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This work aimed to investigate the biopolyethylene (BioPE)/wood powder (WP) composites compatibilized with polyethylene-grafted maleic anhydride (PE-g-MA), using macaíba oil (OM) as a processing aid. The composites were prepared, fist, in an internal mixer and, later, the crushed flakes were molded by injection. Mechanical properties (impact, tensile, flexural and Shore D hardness), heat deflection temperature (HDT), differential scanning calorimetry (DSC), thermogravimetry (TG), water absorption, torque rheometry and scanning electron microscopy (SEM) were evaluated. The addition of 30% wood powder to the BioPE matrix increased the elastic modulus (tensile and flexural), Shore D hardness and heat deflection temperature (HDT), compared to neat BioPE. These properties were improved when 10% of the PE-g-MA compatibilizer was added, compared to neat BioPE and the non-compatibilized composite. There was a significant reduction in the torque of the composites with the addition of macaíba oil, indicating that it improved the processability. In addition, the incorporation of macaíba oil into the composites helped to reduce water absorption, as well as to increase impact strength. SEM micrographs illustrated a greater degree of interfacial adhesion when PE-g-MA and macaiba oil were added.
Fabiano Santana da Silva; Carlos Bruno Barreto Luna; Danilo Diniz Siqueira; Eduardo Da Silva Barbosa Ferreira; Edcleide Maria Araújo. From Waste to Reuse: Manufacture of Ecological Composites Based on Biopolyethylene/wood Powder with PE-g-MA and Macaíba Oil. Journal of Polymers and the Environment 2021, 1 -17.
AMA StyleFabiano Santana da Silva, Carlos Bruno Barreto Luna, Danilo Diniz Siqueira, Eduardo Da Silva Barbosa Ferreira, Edcleide Maria Araújo. From Waste to Reuse: Manufacture of Ecological Composites Based on Biopolyethylene/wood Powder with PE-g-MA and Macaíba Oil. Journal of Polymers and the Environment. 2021; ():1-17.
Chicago/Turabian StyleFabiano Santana da Silva; Carlos Bruno Barreto Luna; Danilo Diniz Siqueira; Eduardo Da Silva Barbosa Ferreira; Edcleide Maria Araújo. 2021. "From Waste to Reuse: Manufacture of Ecological Composites Based on Biopolyethylene/wood Powder with PE-g-MA and Macaíba Oil." Journal of Polymers and the Environment , no. : 1-17.
Blendas de poliamida 6 (PA6) com poliestireno de alto impacto (HIPS) foram preparadas, utilizando-se o copolímero de estireno-(etileno-butileno)-estireno enxertado de anidrido maleico (SEBS-MA), como agente compatibilizante. As blendas foram preparadas em uma extrusora de rosca dupla corrotacional e, posteriormente, moldadas por injeção. As propriedades de reometria de torque, resistência ao impacto Izod, temperatura de deflexão térmica (HDT) e microscopia eletrônica de varredura (MEV) foram investigadas. Os resultados mostraram que houve um aumento no torque das blendas de PA6/HIPS com a adição do compatibilizante SEBS-MA. A resistência ao impacto e a HDT aumentaram 56% e 24,5 % em comparação com a PA6 pura, quando a formulação da blenda PA6/HIPS contém 15 pcr de SEBS-MA. Essa blenda apresentou uma maior estabilidade na morfologia, conforme verificado no MEV, com melhor adesão interfacial e menor quantidade de vazios, resultando principalmente na maior resistência ao impacto. Em geral, as propriedades de resistência ao impacto e HDT da PA6 podem ser adaptadas e aprimoradas por meio do desenvolvimento de blendas poliméricas.
Jessika Andrade Dos Santos Nogueira; Carlos Bruno Barreto Luna; Danilo Diniz Siqueira; Edson Antônio Dos Santos Filho; Edcleide Maria Araújo. Investigação do desempenho de blendas PA6/HIPS compatibilizadas com SEBS-MA. Efeito do teor do compatibilizante nas propriedades mecânicas, termomecânicas, reometria de torque e na morfologia. Research, Society and Development 2021, 10, 1 .
AMA StyleJessika Andrade Dos Santos Nogueira, Carlos Bruno Barreto Luna, Danilo Diniz Siqueira, Edson Antônio Dos Santos Filho, Edcleide Maria Araújo. Investigação do desempenho de blendas PA6/HIPS compatibilizadas com SEBS-MA. Efeito do teor do compatibilizante nas propriedades mecânicas, termomecânicas, reometria de torque e na morfologia. Research, Society and Development. 2021; 10 (8):1.
Chicago/Turabian StyleJessika Andrade Dos Santos Nogueira; Carlos Bruno Barreto Luna; Danilo Diniz Siqueira; Edson Antônio Dos Santos Filho; Edcleide Maria Araújo. 2021. "Investigação do desempenho de blendas PA6/HIPS compatibilizadas com SEBS-MA. Efeito do teor do compatibilizante nas propriedades mecânicas, termomecânicas, reometria de torque e na morfologia." Research, Society and Development 10, no. 8: 1.
In this work, PA6/EPDM-MA was added as an impact modifier for high-performance polypropylene (PP) production. PA6/EPDM-MA compounds were processed in an internal mixer, aiming at chemical reaction between maleic anhydride of EPDM-MA and the amine terminal groups of PA6. Afterward, PP/(PA6/EPDM-MA) blends were processed by extrusion and injection molding. Rheological properties were evaluated using torque rheometry; additionally, Fourier transform infrared spectroscopy, Molau test, impact and tensile strengths, Shore D hardness, thermal deflection temperature, X-ray diffraction, differential scanning calorimetry, thermogravimetry, water absorption, contact angle, and scanning electron microscopy tests were performed in injected specimens. PP/(PA6/EPDM-MA) with 70/(15/15)% displayed quite high increase in impact and elongation at break, with gains of 850% and 265%, compared to neat PP. There were no drastic losses in tensile strength, elastic modulus, and Shore D hardness, due to PA6 addition. A significant increase was seen in the thermal stability of PP/(PA6/EPDM-MA), corroborating the increase in structural stability seen in HDT. SEM images showed high interfacial adhesion between PP and PA6/EPDM-MA corroborating higher mechanical properties. Summing up, PA6/EPDM-MA premix acted as an efficient impact modifier for PP. Acquired data show that P6/EPDM-MA system was effective in developing high-performance PP with potential for application in the automotive and electronics industries.
Carlos Bruno Barreto Luna; Danilo Diniz Siqueira; Eduardo Da Silva Barbosa Ferreira; Edcleide Maria Araújo; Renate Maria Ramos Wellen. Reactive processing of PA6 / EPDM‐MA blends as modifier for application and development of high‐performance polypropylene. Journal of Vinyl and Additive Technology 2021, 1 .
AMA StyleCarlos Bruno Barreto Luna, Danilo Diniz Siqueira, Eduardo Da Silva Barbosa Ferreira, Edcleide Maria Araújo, Renate Maria Ramos Wellen. Reactive processing of PA6 / EPDM‐MA blends as modifier for application and development of high‐performance polypropylene. Journal of Vinyl and Additive Technology. 2021; ():1.
Chicago/Turabian StyleCarlos Bruno Barreto Luna; Danilo Diniz Siqueira; Eduardo Da Silva Barbosa Ferreira; Edcleide Maria Araújo; Renate Maria Ramos Wellen. 2021. "Reactive processing of PA6 / EPDM‐MA blends as modifier for application and development of high‐performance polypropylene." Journal of Vinyl and Additive Technology , no. : 1.
This work aimed to investigate the biopolyethylene (BioPE)/wood powder (WP) composites compatibilized with polyethylene-grafted maleic anhydride (PE-g-MA), using macaíba oil (OM) as a processing aid. The composites were prepared, initially, in an internal mixer and, later, the crushed flakes were molded by injection. Mechanical properties (impact, tensile, flexural and Shore D hardness), heat deflection temperature (HDT), Vicat softening temperature, differential scanning calorimetry (DSC), thermogravimetry (TG), water absorption, torque rheometry and scanning electron microscopy (SEM) were evaluated. The addition of 30% wood powder to the BioPE matrix increased the elastic modulus (tensile and flexural), Shore D hardness and heat deflection temperature (HDT), compared to neat BioPE. These properties were improved when 10% of the PE-g-MA compatibilizer was added, compared to neat BioPE and the non-compatibilized composite. There was a significant reduction in the torque of the composites with the addition of macaíba oil, indicating that it improved the processability. In addition, the incorporation of macaíba oil into the composites helped to reduce water absorption, as well as to increase impact strength. SEM micrographs illustrated a greater degree of interfacial adhesion when PE-g-MA and macaiba oil were added.
Fabiano Santana da Silva; Carlos Bruno Barreto Luna; D D Siqueira; Eduardo Ferreira; Edcleide Maria Araujo. From Waste to Reuse: Manufacture of Ecological Composites Based on Biopolyethylene/Wood Powder with PE-g-MA and Macaíba oil. 2021, 1 .
AMA StyleFabiano Santana da Silva, Carlos Bruno Barreto Luna, D D Siqueira, Eduardo Ferreira, Edcleide Maria Araujo. From Waste to Reuse: Manufacture of Ecological Composites Based on Biopolyethylene/Wood Powder with PE-g-MA and Macaíba oil. . 2021; ():1.
Chicago/Turabian StyleFabiano Santana da Silva; Carlos Bruno Barreto Luna; D D Siqueira; Eduardo Ferreira; Edcleide Maria Araujo. 2021. "From Waste to Reuse: Manufacture of Ecological Composites Based on Biopolyethylene/Wood Powder with PE-g-MA and Macaíba oil." , no. : 1.
A demanda do mercado por polímeros biodegradáveis tem aumentado rapidamente, e a policaprolactona (PCL) aponta como opção interessante para indústria e a comunidade científica. O presente trabalho teve como objetivo avaliar o efeito do tratamento térmico de recozimento nas propriedades mecânicas (impacto, tração, flexão e dureza), termomecânicas (temperatura de deflexão térmica (HDT) e temperatura de amolecimento Vicat (TAV)) e térmicas (calorimetria exploratória diferencial (DSC) e termogravimetria (TG)), em corpos de prova injetados da PCL. Obteve-se aumento no módulo elástico, na resistência à tração, na dureza Shore D, na HDT, na TAV e na estabilidade térmica da PCL após tratamento térmico à 50°C. Enquanto, decréscimos foram verificados na resistência ao impacto e no alongamento na ruptura. No geral, o recozimento aumentou o desempenho da PCL e pode ser considerado como próspera metodologia na manipulação de propriedades almejadas para aplicações específicas.
Edson Antonio Dos Santos Filho; Carlos Bruno Barreto Luna; Danilo Diniz Siqueira; Edcleide Maria Araújo; Renate Maria Ramos Wellen. Efeito do recozimento nas propriedades mecânicas, térmicas e termomecânicas da PCL. Research, Society and Development 2020, 9, 1 .
AMA StyleEdson Antonio Dos Santos Filho, Carlos Bruno Barreto Luna, Danilo Diniz Siqueira, Edcleide Maria Araújo, Renate Maria Ramos Wellen. Efeito do recozimento nas propriedades mecânicas, térmicas e termomecânicas da PCL. Research, Society and Development. 2020; 9 (12):1.
Chicago/Turabian StyleEdson Antonio Dos Santos Filho; Carlos Bruno Barreto Luna; Danilo Diniz Siqueira; Edcleide Maria Araújo; Renate Maria Ramos Wellen. 2020. "Efeito do recozimento nas propriedades mecânicas, térmicas e termomecânicas da PCL." Research, Society and Development 9, no. 12: 1.
Biocomposites processed with polycaprolactone (PCL) and macaíba fiber (MF) were melting extruded in this work with MF content ranging from 10% to 20%. MF was naturally added to PCL as also chemically treated with maleic anhydride (MA), sodium hydroxide (NaOH), and 3-Methacryloxypropyltrimethoxysilane (Silane). Afterwards biocomposite were thermally, spectroscopically, mechanically and morphologically characterized. From the gathered results, higher thermal stability was observed for biocomposites upon higher MF content, regarding the chemical treatment MA presented the best performance whereas NaOH the lowest, similar trend was also verified with mechanical behavior. From contact angle and water absorption results it was suggested macaíba oil exudation to the surface acts decreasing interaction with water and, therefore, increasing the contact angle, while the added MF provide more opened structure which favors the water entrance, whereas the time and polarity effects should be recognized, which eases H2O entrance from surface to biocomposites core and improve interactions between PCL matrix and MF, respectively being translated in higher compatible biocomposites. Summing up, biocomposites with 10% of natural or treated macaíba fiber presented the best synergism. MF addition to PCL provides a sustainable alternative to PCL biocomposites, besides supplying the literature with new information on applications of natural and chemically treated macaíba fibers.
D.D. Siqueira; C.B.B. Luna; E.S.B. Ferreira; E.M. Araújo; R.M.R. Wellen. Tailored PCL/Macaíba fiber to reach sustainable biocomposites. Journal of Materials Research and Technology 2020, 9, 9691 -9708.
AMA StyleD.D. Siqueira, C.B.B. Luna, E.S.B. Ferreira, E.M. Araújo, R.M.R. Wellen. Tailored PCL/Macaíba fiber to reach sustainable biocomposites. Journal of Materials Research and Technology. 2020; 9 (5):9691-9708.
Chicago/Turabian StyleD.D. Siqueira; C.B.B. Luna; E.S.B. Ferreira; E.M. Araújo; R.M.R. Wellen. 2020. "Tailored PCL/Macaíba fiber to reach sustainable biocomposites." Journal of Materials Research and Technology 9, no. 5: 9691-9708.
The practice of recycling over the years has been increasingly encouraged, with the aim being the manufacturing of materials that contribute to sustainable development. In light of this, the present work evaluated the potential of mixtures of polystyrene (PS)/recycled copolymer polypropylene (PPr), using styrene‐(ethylene/butylene)‐styrene (SEBS) as a compatibilizing agent. Initially, the mixtures were prepared in a co‐rotational twin‐screw extruder, and, afterwards, the extruded granules were molded by injection. The properties of torque rheometry, impact strength, tensile properties, differential scanning calorimetry (DSC), heat deflection temperature (HDT), and scanning electron microscopy (SEM) were evaluated. The formulation PS/PPr/SEBS (70/20/10 %wt.) demonstrated an increase in viscosity, corroborating with an increase of 123% and 227% in the elongation at break and impact strength, respectively, compared to neat PS. Though the elastic modulus and tensile strength suffered losses, the reduction was not drastic. Furthermore, the addition of a semi‐crystalline recycled material in the amorphous matrix (PS) contributed to an increase in thermomechanical strength, as seen in the HDT. The morphology revealed that SEBS is effective in making PS/PPr mixtures compatible because the dispersed phase is well adhered to the PS matrix and promotes greater morphological stability. Thus, it is possible to add value to discarded material and reduce the costs of the final product, which can reduce pollution.
Carlos Luna; Danilo Siqueira; Eduardo Ferreira; Wallisson Silva; Jessika Nogueira; Edcleide Araújo. From Disposal to Technological Potential: Reuse of Polypropylene Waste from Industrial Containers as A Polystyrene Impact Modifier. Sustainability 2020, 12, 5272 .
AMA StyleCarlos Luna, Danilo Siqueira, Eduardo Ferreira, Wallisson Silva, Jessika Nogueira, Edcleide Araújo. From Disposal to Technological Potential: Reuse of Polypropylene Waste from Industrial Containers as A Polystyrene Impact Modifier. Sustainability. 2020; 12 (13):5272.
Chicago/Turabian StyleCarlos Luna; Danilo Siqueira; Eduardo Ferreira; Wallisson Silva; Jessika Nogueira; Edcleide Araújo. 2020. "From Disposal to Technological Potential: Reuse of Polypropylene Waste from Industrial Containers as A Polystyrene Impact Modifier." Sustainability 12, no. 13: 5272.
The aim of the present work is to evaluate the effect of NaOH solution as a stress cracking agent on the thermal and tensile properties of PET and PET/ZnO composites. The solutions were applied during tensile testing and the effects were monitored by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and testing the actual mechanical properties. The rate of crystallization was increased when the samples were exposed to NaOH, as observed by both cold and melt crystallization; this is possibly due to the reduction in molar mass of the PET molecules caused by NaOH. During melting, the DSC peaks became more complex, which is probably due to the distinct macromolecular mass, as well as crystallites with different sizes and levels of perfection. According to TGA analyses, no drastic changes were observed on the thermal stability of PET due to the action of NaOH. The tensile properties were shown to decrease drastically upon exposure to NaOH, which is the main symptom of stress cracking, leading to increased fragility, as also observed in the scanning electron microscopy (SEM) images. The presence of ZnO improved PET crystallization and provided some protection against the harmful effects of NaOH.
Ana Beatriz De Sousa Barros; Rômulo De Freitas Farias; Danilo Diniz Siqueira; Carlos Bruno Barreto Luna; Edcleide Maria Araújo; Marcelo Silveira Rabello; Renate Maria Ramos Wellen. The Effect of ZnO on the Failure of PET by Environmental Stress Cracking. Materials 2020, 13, 2844 .
AMA StyleAna Beatriz De Sousa Barros, Rômulo De Freitas Farias, Danilo Diniz Siqueira, Carlos Bruno Barreto Luna, Edcleide Maria Araújo, Marcelo Silveira Rabello, Renate Maria Ramos Wellen. The Effect of ZnO on the Failure of PET by Environmental Stress Cracking. Materials. 2020; 13 (12):2844.
Chicago/Turabian StyleAna Beatriz De Sousa Barros; Rômulo De Freitas Farias; Danilo Diniz Siqueira; Carlos Bruno Barreto Luna; Edcleide Maria Araújo; Marcelo Silveira Rabello; Renate Maria Ramos Wellen. 2020. "The Effect of ZnO on the Failure of PET by Environmental Stress Cracking." Materials 13, no. 12: 2844.
RESUMO Neste estudo, foram avaliadas blendas de polipropileno copolímero (PPCop)/polipropileno reciclado (PPRec), proveniente de baldes industriais pós-consumo, em três proporções diferentes (80:20; 60:40 e 40:60% em peso). As blendas foram avaliadas por índice de fluidez, reometria de torque e reologia em regime dinâmico-oscilatório. Os resultados de índice de fluidez indicaram que a mistura de material reciclado com o PPCop promove uma diminuição da massa molar, em comparação ao PPCop. Por reometria de torque, verificou-se que as blendas melhoraram a processabilidade em comparação ao PPCop. Além disso, as blendas apresentaram estabilidade ao longo do processamento, indicando ausência de degradação para as condições de processos utilizadas. Por meio dos ensaios em regime dinâmico-oscilatório, observou-se que, em baixas frequências (< 1 rad/s), o PPCop e as blendas (PPCop/PPRec) apresentam um comportamento de fluido Newtoniano, enquanto que, para frequências maiores que 1 rad/s, um comportamento de fluido pseudoplástico. Os valores dos pontos de intersecção (G’ = G”) das curvas de módulo de armazenamento (G’) e de módulo de perda (G’’), em função da frequência angular (ω), indicaram que as blendas apresentaram uma redução da massa molar, sendo mais pronunciada na composição contendo 60% de PPRec. Os resultados reológicos das blendas PPCop/PPRec foram de grande relevância, uma vez que permitem analisar o comportamento de blendas contendo material reciclado.
Carlos Bruno Barreto Luna; Wallisson Alves Da Silva; Edcleide Maria Araújo; Danilo Diniz Siqueira; Akidauana Dandara Brito De Oliveira. Propriedades reológicas de blendas de polipropileno copolímero/polipropileno reciclado oriundo de recipientes industriais. Matéria (Rio de Janeiro) 2020, 25, 1 .
AMA StyleCarlos Bruno Barreto Luna, Wallisson Alves Da Silva, Edcleide Maria Araújo, Danilo Diniz Siqueira, Akidauana Dandara Brito De Oliveira. Propriedades reológicas de blendas de polipropileno copolímero/polipropileno reciclado oriundo de recipientes industriais. Matéria (Rio de Janeiro). 2020; 25 (3):1.
Chicago/Turabian StyleCarlos Bruno Barreto Luna; Wallisson Alves Da Silva; Edcleide Maria Araújo; Danilo Diniz Siqueira; Akidauana Dandara Brito De Oliveira. 2020. "Propriedades reológicas de blendas de polipropileno copolímero/polipropileno reciclado oriundo de recipientes industriais." Matéria (Rio de Janeiro) 25, no. 3: 1.
Reusing rubber waste from footwear industry emerges as great practise in order to reduce environmental damage on natural ecosystems. Based on this target, the present work aimed to apply the response surface methodology (RSM) to polystyrene/styrene-butadiene PS/SBRr blends compatibilized with styrene-ethylene-butylene-styrene (SEBS). A mixture planning was applied to PS/SBRr/SEBS blends in order to investigate mechanical and thermomechanical behaviors as response variables. Scanning electron microscopy (SEM) was used to evaluate the morphology of investigated blends, which were melt extruded in a corrotational twin screw extruder and specimens were injection moulded. High impact strength, toughness, elongation at break and thermal deflection temperature (HDT) were achieved at SEBS rich region (~ 10%). At PS rich region, tensile strength, Shore D hardness and Vicat softening temperature (VST) were more expressive. Related to morphological character, blends with 10% SEBS presented the highest interfacial adhesion, with high level of plastic deformation. Gathered results show that depending on the composition, properties significantly change, being RSM a proper tool to preview trends on mechanical and thermomechanical properties.
Carlos Bruno Barreto Luna; Eduardo Da Silva Barbosa Ferreira; Danilo Diniz Siqueira; Edcleide Maria Araújo; Renate Maria Ramos Wellen. RSM applied to PS/SBRr/SEBS Blends. Proper tool for maximized properties. Materials Research Express 2020, 7, 015327 .
AMA StyleCarlos Bruno Barreto Luna, Eduardo Da Silva Barbosa Ferreira, Danilo Diniz Siqueira, Edcleide Maria Araújo, Renate Maria Ramos Wellen. RSM applied to PS/SBRr/SEBS Blends. Proper tool for maximized properties. Materials Research Express. 2020; 7 (1):015327.
Chicago/Turabian StyleCarlos Bruno Barreto Luna; Eduardo Da Silva Barbosa Ferreira; Danilo Diniz Siqueira; Edcleide Maria Araújo; Renate Maria Ramos Wellen. 2020. "RSM applied to PS/SBRr/SEBS Blends. Proper tool for maximized properties." Materials Research Express 7, no. 1: 015327.
Polyamide 6 (PA6) is a widely applied thermoplastic, however, drawbacks as low notch impact strength and high moisture absorption hinder its commercialization. Seeking improvements for PA6, this work investigated blends based on PA6/maleic anhydride grafted ethylene propylene diene copolymer (EPDM-MA) with 1% maleic anhydride (MA). In the first step, blends were processed using a co-rotational twin-screw extruder, afterwards, pellets were injection moulded. Torque rheometry, impact strength, tensile strength, thermal deflection temperature (HDT), differential scanning calorimetry (DSC), contact angle and scanning electron microscopy (SEM) were performed and the main properties were defined. Torque of PA6/EPDM-MA blends increased compared to neat PA6. Only subtle decreases were verified in the tensile strength, elastic modulus and HDT parameters. Nevertheless, significant increases were observed for the elongation at break and the impact strength. EPDM-MA addition to PA6 did not affect its melting and crystallization parameters. Contact angle of all blends increased when compared to PA6, suggesting higher hydrophobic character of PA6/EPDM-MA blends. Improved results were collected for EPDM-MA 10%, reaching increases of 850% and 213% in impact strength and elongation at break. From SEM images, particles were observed with diameters ranging from 0.1 to 2 µm, which were well dispersed and properly distributed in the PA6 matrix; additionally, for the blends with 10%; 12.5% and 15% EPDM-MA, higher level of plastic deformation was reached corroborating with the significant increase in the impact strength and elongation at break.
Carlos Bruno Barreto Luna; Danilo Diniz Siqueira; Eduardo Da Silva Barbosa Ferreira; Edcleide Maria Araújo; Renate Maria Ramos Wellen. Reactive compatibilization as a proper tool to improve PA6 toughness. Materials Research Express 2019, 6, 125367 .
AMA StyleCarlos Bruno Barreto Luna, Danilo Diniz Siqueira, Eduardo Da Silva Barbosa Ferreira, Edcleide Maria Araújo, Renate Maria Ramos Wellen. Reactive compatibilization as a proper tool to improve PA6 toughness. Materials Research Express. 2019; 6 (12):125367.
Chicago/Turabian StyleCarlos Bruno Barreto Luna; Danilo Diniz Siqueira; Eduardo Da Silva Barbosa Ferreira; Edcleide Maria Araújo; Renate Maria Ramos Wellen. 2019. "Reactive compatibilization as a proper tool to improve PA6 toughness." Materials Research Express 6, no. 12: 125367.
Dear Editor, and dear David Marquiss, The present contribution "Reactive compatilization of PCL/WP upon addition of PCL-MA. Smart option for recycling industry", previously submitted as "Benefits of PCL/WP Biocomposites. Smart Option for Recycling Industries", was re-read and re-written aiming to attain MRE exigencies, its reference style, as also grammar and spelling mistakes were properly modified. We would like to apologize for any inconvenience we may have caused. Its worth of mention this manuscript presents a detailed investigation concerned with biodegradable compounds based on poly (ε-caprolactone) (PCL) filled with wood powder (WP) and compatibilized with maleic anhydride grafted polycaprolactone (PCL-MA). Effect of WP and PCL-MA addition were in details investigated, from main data, increase in elastic modulus, Shore D hardness, HDT and VST were observed related to neat PCL; whereas losses were verified in impact strength, tensile strength and thermal stability. Additionally PCL-MA provided greater interfacial adhesion between PCL and WP, while WP made crystallization faster providing shorter injection cycles with no warping. Higher wettability between PCL and WP was reached, which are important findings for recycling industries, since WP can be used to develop higher performance bio-composites, economically viable, contributing to new sustainable products generation. We are sure that this collaboration will be fruitful to the readers and admirers of Materials Research Express Journal. Hoping that the paper is suitable for publication, I remain. Sincerely yours,
Carlos Bruno Barreto Luna; Danilo Diniz Siqueira; Eduardo Da Silva Barbosa Ferreira; Edcleide Maria Araújo; Renate Maria Ramos Wellen. Reactive compatilization of PCL/WP upon addition of PCL-MA. Smart option for recycling industry. Materials Research Express 2019, 6, 125317 .
AMA StyleCarlos Bruno Barreto Luna, Danilo Diniz Siqueira, Eduardo Da Silva Barbosa Ferreira, Edcleide Maria Araújo, Renate Maria Ramos Wellen. Reactive compatilization of PCL/WP upon addition of PCL-MA. Smart option for recycling industry. Materials Research Express. 2019; 6 (12):125317.
Chicago/Turabian StyleCarlos Bruno Barreto Luna; Danilo Diniz Siqueira; Eduardo Da Silva Barbosa Ferreira; Edcleide Maria Araújo; Renate Maria Ramos Wellen. 2019. "Reactive compatilization of PCL/WP upon addition of PCL-MA. Smart option for recycling industry." Materials Research Express 6, no. 12: 125317.
In this work blending design was applied to development of polypropylene (PP)/high impact polystyrene (HIPS) blends using styrene-(ethylene/butylene) styrene (SEBS) as compatibilizing agent. PP/HIPS/SEBS (50/40/10%) which presented the best balance between impact strength and stiffness was selected, aiming to investigate the effect of five blending sequences on morphology, mechanical, thermomechanical and thermal properties. Blends were initially compounded in a corrotational twin screw extruder and later on extruded granules were injection molded. Acquired results showed the morphology and impact of compatible blends were distinct and depend on blending sequence, i.e., being PP and SEBS firstly extrusion premixed followed by HIPS addition in the second extrusion step there was increase in impact strength, thermal deflection temperature (HDT), and thermal stability compared to PP and PP/HIPS, contrary, when HIPS and SEBS were firstly extrusion premixed and PP was added in the second extrusion step excessive reduction of HIPS particle size was verified; and additionally HDT, impact strength and thermal stability decreasing were observed compared to the other sequences. Summing up, PP/HIPS/SEBS properties are adjustable to specific application needs modifying the blending route.
Carlos Bruno Barreto Luna; Eduardo Da Silva Barbosa Ferreira; Danilo Diniz Siqueira; Wallisson Alves Da Silva; Edcleide Maria Araújo; Renate Maria Ramos Wellen. Tailoring performance of PP/HIPS/SEBS through blending design. Materials Research Express 2019, 6, 115321 .
AMA StyleCarlos Bruno Barreto Luna, Eduardo Da Silva Barbosa Ferreira, Danilo Diniz Siqueira, Wallisson Alves Da Silva, Edcleide Maria Araújo, Renate Maria Ramos Wellen. Tailoring performance of PP/HIPS/SEBS through blending design. Materials Research Express. 2019; 6 (11):115321.
Chicago/Turabian StyleCarlos Bruno Barreto Luna; Eduardo Da Silva Barbosa Ferreira; Danilo Diniz Siqueira; Wallisson Alves Da Silva; Edcleide Maria Araújo; Renate Maria Ramos Wellen. 2019. "Tailoring performance of PP/HIPS/SEBS through blending design." Materials Research Express 6, no. 11: 115321.
Researches of polymer blends based on biological and biodegradable polymers appear as a viable alternative to develop environmentally friendly materials. Therefore, the aim of this research was to produce compounds made with biological polyethylene, i.e., Biopolyethylene, Bio-PE, added to the biodegradable Polycaprolactone (PCL) and functionalized by the copolymer of polyethylene grafted with acrylic acid (PEgAA), to obtain better mechanical properties and toughen Bio-PE. Compounds were processed in a co-rotating twin screw extruder and sample tests were injection molded. The compositions investigated were: Bio-PE/PCL at 90/10, 80/20 and 70/30 wt.% without compatibilizer and upon addition of 10 phr (parts per hundred of resin) of PEgAA. The blends were characterized by X-ray diffraction (XRD), impact strength, heat deflection temperature (HDT) and scanning electron microscopy (SEM). Through XRD, it was observed that addition of PCL and PEgAA did not significantly change Bio-PE diffraction patterns. Impact strength data showed that the blends presented a tougher behavior upon addition of PCL and PEgAA. The HDT of compatibilized blend with 20wt.% of PCL was slightly higher. SEM images of compatibilized blends showed lower average particle diameters as well as absence of coalescence and aggregates.
Elieber Barros Bezerra; Danyelle Campos França; Dayanne Diniz De Souza Morais; Danilo Diniz Siqueira; Edcleide Maria Araújo; Renate Maria Ramos Wellen. Toughening of bio-PE upon addition of PCL and PEgAA. REM - International Engineering Journal 2019, 72, 469 -478.
AMA StyleElieber Barros Bezerra, Danyelle Campos França, Dayanne Diniz De Souza Morais, Danilo Diniz Siqueira, Edcleide Maria Araújo, Renate Maria Ramos Wellen. Toughening of bio-PE upon addition of PCL and PEgAA. REM - International Engineering Journal. 2019; 72 (3):469-478.
Chicago/Turabian StyleElieber Barros Bezerra; Danyelle Campos França; Dayanne Diniz De Souza Morais; Danilo Diniz Siqueira; Edcleide Maria Araújo; Renate Maria Ramos Wellen. 2019. "Toughening of bio-PE upon addition of PCL and PEgAA." REM - International Engineering Journal 72, no. 3: 469-478.
This work investigated the melting and nonisothermal melt crystallization of poly (butylene terephthalate) (PBT) and poly (ε-caprolactone) (PCL) blends with PCL content ranging from 3 to 10% of the weight. Thermal stability and morphology analyses were performed by thermogravimetry (TG) and scanning electron microscopy (SEM), whereas the nonisothermal crystallization of PBT/PCL blends carried out by differential scanning calorimetry (DSC), and the kinetic parameters were determined using Pseudo-Avrami, Ozawa and Mo models. PCL improved thermal stability by decreasing the degradation rate of PBT. From SEM images the brittle fracture of PBT was modified through PCL addition with absorption energy mechanisms developed in PBT/PCL blends. PCL delayed the melt crystallization of PBT, most due to its fluid viscous state during PBT crystallization. Ozawa model failed to provide an effective description of the blends, while Pseudo-Avrami and Mo models successfully described the nonisothermal melt crystallization, and linearity deviations were observed only at the beginning and at the end of crystallization, probably due to nucleation and spherulite impingement during secondary crystallization.
Ingridy Silva; Nichollas Jaques; Janetty Barros; Débora Almeida; Eunice Lima; Rondinele Araújo; Glauber Cerqueira; Camila Pereira; Arthur Silva; Neymara Nepomuceno; Luanna Cesario; Danilo D. Siqueira; Renate Maria Ramos Wellen. Clever use of PCL as kinetic controller in PBT/PCL blends. Materials Research Express 2019, 6, 115313 .
AMA StyleIngridy Silva, Nichollas Jaques, Janetty Barros, Débora Almeida, Eunice Lima, Rondinele Araújo, Glauber Cerqueira, Camila Pereira, Arthur Silva, Neymara Nepomuceno, Luanna Cesario, Danilo D. Siqueira, Renate Maria Ramos Wellen. Clever use of PCL as kinetic controller in PBT/PCL blends. Materials Research Express. 2019; 6 (11):115313.
Chicago/Turabian StyleIngridy Silva; Nichollas Jaques; Janetty Barros; Débora Almeida; Eunice Lima; Rondinele Araújo; Glauber Cerqueira; Camila Pereira; Arthur Silva; Neymara Nepomuceno; Luanna Cesario; Danilo D. Siqueira; Renate Maria Ramos Wellen. 2019. "Clever use of PCL as kinetic controller in PBT/PCL blends." Materials Research Express 6, no. 11: 115313.
Biocomposites of poly (ɛ-caprolactone)/Macaiba (PCL/MF) upon fiber addition ranging from 10% to 20% were successfully extruded and throughly characterized by torque rheometry, thermogravimetry (TG), Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), contact angle, heat deflection temperature (HDT), scanning electron microscopy (SEM), mechanical properties in tension, flexural and impact. No degradation evidences were verified during processing and all PCL/MF biocomposites presented higher thermal stability related to neat PCL. Narrower crystallization peaks were shifted to higher temperatures suggesting Macaiba fiber nucleating effect whereas its oil may be acted as plasticizer for PCL changing to lower or higher the mechanical properties depending on the investigated parameter. Throughout this work is shown MF provides a sustainable alternative to PCL biocomposites with wider applications.
Danilo D. Siqueira; C B B Luna; Edcleide M. Araújo; E S B Ferreira; R M R Wellen. Biocomposites based on PCL and macaiba fiber. Detailed characterization of main properties. Materials Research Express 2019, 6, 095335 .
AMA StyleDanilo D. Siqueira, C B B Luna, Edcleide M. Araújo, E S B Ferreira, R M R Wellen. Biocomposites based on PCL and macaiba fiber. Detailed characterization of main properties. Materials Research Express. 2019; 6 (9):095335.
Chicago/Turabian StyleDanilo D. Siqueira; C B B Luna; Edcleide M. Araújo; E S B Ferreira; R M R Wellen. 2019. "Biocomposites based on PCL and macaiba fiber. Detailed characterization of main properties." Materials Research Express 6, no. 9: 095335.
This research aimed to evaluate the influence of styrene–butadiene–styrene (SBS) compatibilizer in the polystyrene blends properties with a recycled styrene–butadiene rubber compound. The SBS content was 5, 7.5, and 10%. Commercial high-impact polystyrene (HIPS) was used for comparison. The results indicated that the viscosity of the blends was higher than that of HIPS. The blends compatibilized with 5 and 7.5% had the same level of impact strength as HIPS, while the one with 10% obtained a gain of 80% in relation to HIPS. The flexural strength, hardness, heat deflection temperature, and Vicat softening temperature properties were similar to those of HIPS, which was attributed to the presence of inorganic fillers, minimizing losses in these properties. By atomic force microscopy, two distinct phases were observed, and in the morphology analyzed through scanning electron microscopy, a typical characteristic of immiscible blends was observed.
Carlos Bruno Barreto Luna; Edcleide Maria Araújo; Danilo Diniz Siqueira; Dayanne Diniz De Souza Morais; Edson Antonio Dos Santos Filho; Marcus Vinícius Lia Fook. Incorporation of a recycled rubber compound from the shoe industry in polystyrene: Effect of SBS compatibilizer content. Journal of Elastomers & Plastics 2019, 52, 3 -28.
AMA StyleCarlos Bruno Barreto Luna, Edcleide Maria Araújo, Danilo Diniz Siqueira, Dayanne Diniz De Souza Morais, Edson Antonio Dos Santos Filho, Marcus Vinícius Lia Fook. Incorporation of a recycled rubber compound from the shoe industry in polystyrene: Effect of SBS compatibilizer content. Journal of Elastomers & Plastics. 2019; 52 (1):3-28.
Chicago/Turabian StyleCarlos Bruno Barreto Luna; Edcleide Maria Araújo; Danilo Diniz Siqueira; Dayanne Diniz De Souza Morais; Edson Antonio Dos Santos Filho; Marcus Vinícius Lia Fook. 2019. "Incorporation of a recycled rubber compound from the shoe industry in polystyrene: Effect of SBS compatibilizer content." Journal of Elastomers & Plastics 52, no. 1: 3-28.
In this work, compounds based on two grades of polypropylene (PP), i.e., PP H503 or PP H103 with residues of Big bag fabrics (RBB) were processed in a corrotational twin screw extruder with RBB content ranging from 10% to 50% of the weight. Then, their thermal properties were investigated through Differential Scanning Calorimetry (DSC) and Thermogravimetry (TG); mechanical by tensile and impact; thermomechanic by heat deflection temperature (HDT); and their morphology by Scanning Electron Microscopy (SEM). With the aim to add maximum RBB content without considerable damage to the properties of neat PPs, it was observed that addition of 10%, 30% and 50% of RBB did not significantly interfere in the PP matrices, being the compound PP + 30% RBB which one presented more successful properties, leading to reused compounds with higher performance and lower costs at same time.
Eduardo Da Silva Barbosa Ferreira; Caio Henrique Do Ó Pereira; Edcleide Maria Araújo; Elieber Barros Bezerra; Danilo Diniz Siqueira; Renate Maria Ramos Wellen. Properties and Morphology of Polypropylene/Big Bags Compounds. Materials Research 2019, 22, 1 .
AMA StyleEduardo Da Silva Barbosa Ferreira, Caio Henrique Do Ó Pereira, Edcleide Maria Araújo, Elieber Barros Bezerra, Danilo Diniz Siqueira, Renate Maria Ramos Wellen. Properties and Morphology of Polypropylene/Big Bags Compounds. Materials Research. 2019; 22 (suppl 1):1.
Chicago/Turabian StyleEduardo Da Silva Barbosa Ferreira; Caio Henrique Do Ó Pereira; Edcleide Maria Araújo; Elieber Barros Bezerra; Danilo Diniz Siqueira; Renate Maria Ramos Wellen. 2019. "Properties and Morphology of Polypropylene/Big Bags Compounds." Materials Research 22, no. suppl 1: 1.
Danilo Diniz Siqueira; Carlos Bruno Barreto Luna; Edcleide Maria Araújo; Edson Antônio Dos Santos Filho; Dayanne Diniz De Souza Morais; Renate Maria Ramos Wellen. Biodegradable Compounds of Poly (Ɛ-Caprolactone)/Montmorillonite Clays. Materials Research 2019, 22, 1 .
AMA StyleDanilo Diniz Siqueira, Carlos Bruno Barreto Luna, Edcleide Maria Araújo, Edson Antônio Dos Santos Filho, Dayanne Diniz De Souza Morais, Renate Maria Ramos Wellen. Biodegradable Compounds of Poly (Ɛ-Caprolactone)/Montmorillonite Clays. Materials Research. 2019; 22 (suppl 1):1.
Chicago/Turabian StyleDanilo Diniz Siqueira; Carlos Bruno Barreto Luna; Edcleide Maria Araújo; Edson Antônio Dos Santos Filho; Dayanne Diniz De Souza Morais; Renate Maria Ramos Wellen. 2019. "Biodegradable Compounds of Poly (Ɛ-Caprolactone)/Montmorillonite Clays." Materials Research 22, no. suppl 1: 1.
RESUMO Este trabalho teve como objetivo avaliar o envelhecimento termo-oxidativo, nas propriedades mecânicas e de índice de amarelamento (YI), de blendas de poliestireno com borracha reciclada (SBRr), compatibilizadas. As blendas foram preparadas, inicialmente, em uma extrusora de rosca dupla corrotacional e, posteriormente, os grânulos extrudados foram moldados por injeção. Para efeito comparativo, o poliestireno de alto impacto comercial (HIPS) foi processado nas mesmas condições das blendas. Os resultados da caracterização do SBRr indicaram, em sua composição, cargas de sílica, carbonato de cálcio, talco e óxido de zinco, enquanto que, por termogravimetria, verificou-se duas etapas de decomposição térmica. Verificou-se que a resistência ao impacto diminuiu, significativamente, nos 15 dias iniciais do envelhecimento, e, subsequentemente, apresentou uma tendência de estabilização com pequenas oscilações. As propriedades de módulo de elasticidade, resistência e alongamento na ruptura sob tração apresentaram o mesmo comportamento da resistência ao impacto, redução acentuada nos 15 dias inicias, seguida de estabilização, com o decorrer do envelhecimento. Quando a blenda foi compatibilizada com 5% de estireno-butadieno-estireno (SBS), foram observadas as melhores propriedades, antes e após o envelhecimento, apresentando resistência ao impacto equiparáveis ao HIPS. A perda de massa das blendas indicou extração de componentes voláteis. Por índice de amarelamento (YI), observou-se, nas blendas, um aumento brusco nos 15 dias iniciais e, em seguida, estabilidade, com uma taxa de amarelamento praticamente constante. Até 30 dias de envelhecimento, o HIPS apresentou uma baixa taxa de amarelamento, e, posteriormente, ocorreu uma intensificação no YI. No geral, as blendas obtidas por mistura mecânica apresentaram comportamento similar ao HIPS. Porém, somente quando a blenda foi compatibilizada com SBS que o comportamento de impacto apresentou o mesmo patamar do HIPS.
Carlos Bruno Barreto Luna; Felipe Belchior Calheiro Gomes; Danilo Diniz Siqueira; Edcleide Maria Araújo. Influência do envelhecimento termo-oxidativo nas propriedades mecânicas e de amarelamento de blendas de poliestireno com borracha reciclada de estireno-butadieno (SBR). Matéria (Rio de Janeiro) 2019, 24, 1 .
AMA StyleCarlos Bruno Barreto Luna, Felipe Belchior Calheiro Gomes, Danilo Diniz Siqueira, Edcleide Maria Araújo. Influência do envelhecimento termo-oxidativo nas propriedades mecânicas e de amarelamento de blendas de poliestireno com borracha reciclada de estireno-butadieno (SBR). Matéria (Rio de Janeiro). 2019; 24 (3):1.
Chicago/Turabian StyleCarlos Bruno Barreto Luna; Felipe Belchior Calheiro Gomes; Danilo Diniz Siqueira; Edcleide Maria Araújo. 2019. "Influência do envelhecimento termo-oxidativo nas propriedades mecânicas e de amarelamento de blendas de poliestireno com borracha reciclada de estireno-butadieno (SBR)." Matéria (Rio de Janeiro) 24, no. 3: 1.