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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.
A produção de materiais ecológicos está sendo incentivada, visando minimizar os impactos ambientais e promover uma maior sustentabilidade. Portanto, esse trabalho, teve como objetivo desenvolver biocompósitos de biopolietileno (BioPE)/farinha de madeira (FM), utilizando como compatibilizante o polietileno enxertado com anidrido maleico (PE-g-MA). Os biocompósitos foram preparados em uma extrusora de rosca dupla corrotacional e moldados por injeção. As propriedades de resistência ao impacto Izod, resistência à tração, Dureza Shore D, Temperatura de Deflexão Térmica (HDT) e absorção de água foram investigadas. A resistência ao impacto aumentou quando o biocompósito BioPE/FM foi compatibilizado com PE-g-MA. Esse acréscimo foi mais expressivo para 10% de PE-g-MA com alto grau de enxertia de anidrido maleico, indicando um maior nível de interação entre as fases. Os biocompósitos BioPE/FM/PE-g-MA apresentaram propriedades de módulo elástico, resistência à tração, dureza Shore D e HDT aprimoradas, em comparação ao biocompósito não compatibilizado. Um aspecto importante foi a redução da absorção de água para os biocompósitos compatibilizados com PE-g-MA, sugerindo um maior efeito barreira para a difusão de umidade. Do ponto de vista do grau de enxertia de anidrido maleico no PE-g-MA, em geral, a resistência ao impacto foi a propriedade mais sensível. Os resultados indicam que a farinha de madeira é um resíduo com potencial para ser reaproveitado no desenvolvimento de biocompósitos.
Fabiano Santana da Silva; Wallisson Alves da Silva; Carlos Bruno Barreto Luna; Eduardo Da Silva Barbosa Ferreira; Edcleide Maria Araújo. Produção de biocompósitos de biopolietileno/farinha de madeira compatibilizados com PE-g-MA. Avaliação do teor de anidrido maleico nas propriedades mecânicas e termomecânicas. Research, Society and Development 2021, 10, 1 .
AMA StyleFabiano Santana da Silva, Wallisson Alves da Silva, Carlos Bruno Barreto Luna, Eduardo Da Silva Barbosa Ferreira, Edcleide Maria Araújo. Produção de biocompósitos de biopolietileno/farinha de madeira compatibilizados com PE-g-MA. Avaliação do teor de anidrido maleico nas propriedades mecânicas e termomecânicas. Research, Society and Development. 2021; 10 (7):1.
Chicago/Turabian StyleFabiano Santana da Silva; Wallisson Alves da Silva; Carlos Bruno Barreto Luna; Eduardo Da Silva Barbosa Ferreira; Edcleide Maria Araújo. 2021. "Produção de biocompósitos de biopolietileno/farinha de madeira compatibilizados com PE-g-MA. Avaliação do teor de anidrido maleico nas propriedades mecânicas e termomecânicas." Research, Society and Development 10, no. 7: 1.
Membrana pode ser definida como uma barreira, que separa duas fases e restringe o transporte de vários produtos químicos de forma seletiva, apresentando diferentes classificações, morfologias e geometrias. Esses materiais são utilizados em aplicações como: ultrafiltração, microfiltração, pervaporação, separação de gases, órgãos artificiais e outros fins médicos. Membranas sintéticas de fibra oca, obtidas com os diferentes tipos de materiais, vêm ganhando grande atenção nas últimas décadas devido às vantagens em relação à sua grande área específica e a maior compacidade em relação às membranas planas e tubulares utilizadas nos diversos processos de separação com membranas. As fibras ocas em sua grande maioria são preparadas por meio do método de inversão de fases, através da técnica de extrusão a frio com imersão por precipitação. O número de membranas poliméricas disponíveis comercialmente é maior quando comparado com os outros materiais, devido principalmente ao seu baixo custo, mas as membranas provenientes de materiais inorgânicos vêm ganhando uma maior atenção devido a propriedades como resistência química e térmica. Assim, o seguinte estudo tem como objetivo apresentar as principais características das membranas de fibra oca de diversos materiais, destacando as principais vantagens, os métodos de obtenção e aplicações.
Eduardo Da Silva Barbosa Ferreira; Rodholfo Da Silva Barbosa Ferreira; Carlos Bruno Barreto Luna; Edcleide Maria Araújo; Hélio De Lucena Lira. Membranas de fibra oca de diversos materiais e suas aplicações. Research, Society and Development 2021, 10, 1 .
AMA StyleEduardo Da Silva Barbosa Ferreira, Rodholfo Da Silva Barbosa Ferreira, Carlos Bruno Barreto Luna, Edcleide Maria Araújo, Hélio De Lucena Lira. Membranas de fibra oca de diversos materiais e suas aplicações. Research, Society and Development. 2021; 10 (1):1.
Chicago/Turabian StyleEduardo Da Silva Barbosa Ferreira; Rodholfo Da Silva Barbosa Ferreira; Carlos Bruno Barreto Luna; Edcleide Maria Araújo; Hélio De Lucena Lira. 2021. "Membranas de fibra oca de diversos materiais e suas aplicações." Research, Society and Development 10, no. 1: 1.
Environmental damage promoted trough post‐consumer waste from the wood industry has worried the society, while its inadequate disposal has raised concerns of the scientific community. Environmentally and economically effective alternative is reusing this residue to produce smart composites. Therefore, this work aimed to investigate the performance of polypropylene (PP)/Jatobá Wood Powder (WP) composites compatibilized with ethylene propylene diene monomer rubber‐maleic anhydride (EPDM‐MA). The effect of distinct melt flow index (MFI) (PP H103 and PP H503) was also investigated. The composites were characterized using differential scanning calorimetry, thermogravimetry, mechanical properties (tensile, flexural, impact, and Shore D hardness), heat deflection temperature, Vicat softening temperature, water absorption and scanning electron microscopy (SEM). Addition of EPDM‐MA, increased impact strength. The best performance was observed for the composition with 10% EPDM‐MA and PP with lower MFI (PP H503). EPDM‐MA also decreased the water absorption for both PP, most due to the chemical interactions among composite phases. SEM images suggest encapsulation of wood particles by EPDM‐MA, promoting better composites performance. Reported results are valuable for the recycling industry, as well as are economically and environmentally promising.
Eduardo Da Silva Barbosa Ferreira; Carlos Bruno Barreto Luna; Edcleide Maria Araújo; Danilo Diniz Siqueira; Renate Maria Ramos Wellen. Polypropylene/wood powder/ethylene propylene diene monomer rubber‐maleic anhydride composites: Effect of PP melt flow index on the thermal, mechanical, thermomechanical, water absorption, and morphological parameters. Polymer Composites 2020, 42, 484 -497.
AMA StyleEduardo Da Silva Barbosa Ferreira, Carlos Bruno Barreto Luna, Edcleide Maria Araújo, Danilo Diniz Siqueira, Renate Maria Ramos Wellen. Polypropylene/wood powder/ethylene propylene diene monomer rubber‐maleic anhydride composites: Effect of PP melt flow index on the thermal, mechanical, thermomechanical, water absorption, and morphological parameters. Polymer Composites. 2020; 42 (1):484-497.
Chicago/Turabian StyleEduardo Da Silva Barbosa Ferreira; Carlos Bruno Barreto Luna; Edcleide Maria Araújo; Danilo Diniz Siqueira; Renate Maria Ramos Wellen. 2020. "Polypropylene/wood powder/ethylene propylene diene monomer rubber‐maleic anhydride composites: Effect of PP melt flow index on the thermal, mechanical, thermomechanical, water absorption, and morphological parameters." Polymer Composites 42, no. 1: 484-497.
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.
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.
Polypropylene is one of the most consumed thermoplastics in the transformation industry, generating a large volume of post-consumer waste. The practice of reusing materials presents an opportunity for the revaluation of post-consumer plastic waste, aiming to minimize the negative impacts of its disposal. In this work, blends of copolymer polypropylene (PPCop) and recycled copolymer polypropylene (PPRec) from industrial containers were evaluated using 20, 40 and 60% of PPRec. The blends were initially prepared in a co-rotational twin screw extruder, and thereafter, the extruded granules were injection molded. The mechanical, thermal, thermomechanical properties and morphology of the blends produced were evaluated. There was an increase in elastic modulus, tensile strength, heat deflection temperature (HDT), Vicat softening temperature and thermal stability, as compared to the PPCop matrix. An increase in crystallinity was observed by Differential Exploration Calorimetry (DSC), being favored by the reduction of the blends viscosity as verified in the melt flow index (MFI). However, losses were seen in impact strength and elongation at break. The morphologies obtained with the Scanning Electronic Microscope (SEM) are typical of immiscible blends, with spherical domains dispersed in a continuous matrix. The results indicate that PPCop/PPRec blends can contain up to 60% of recycled material by weight, while maintaining quality and reducing the product final cost.
Carlos Bruno Barreto Luna; Eduardo Da Silva Barbosa Ferreira; Lara Júlia Medeiros Dantas Da Silva; Wallisson Alves Da Silva; Edcleide Maria Araújo; João Baptista Da Costa Agra De Melo. Blends with technological potential of copolymer polypropylene with polypropylene from post-consumer industrial containers. Materials Research Express 2019, 6, 125319 .
AMA StyleCarlos Bruno Barreto Luna, Eduardo Da Silva Barbosa Ferreira, Lara Júlia Medeiros Dantas Da Silva, Wallisson Alves Da Silva, Edcleide Maria Araújo, João Baptista Da Costa Agra De Melo. Blends with technological potential of copolymer polypropylene with polypropylene from post-consumer industrial containers. Materials Research Express. 2019; 6 (12):125319.
Chicago/Turabian StyleCarlos Bruno Barreto Luna; Eduardo Da Silva Barbosa Ferreira; Lara Júlia Medeiros Dantas Da Silva; Wallisson Alves Da Silva; Edcleide Maria Araújo; João Baptista Da Costa Agra De Melo. 2019. "Blends with technological potential of copolymer polypropylene with polypropylene from post-consumer industrial containers." Materials Research Express 6, no. 12: 125319.
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.
Large waste amounts from wood industries as powder and sawdust are daily produced, and reusing these materials otherwise would be discharged to the environment has become an economically viable and environmentally friendly alternative to produce new materials. Based on these arguments, polypropylene (PP)/Jatobá wood powder composites upon addition of two types of PP were processed in a corotational twin screw extruder; specimens were injected and molded and their characterization was performed through differential scanning calorimetry, thermogravimetry, mechanical properties (impact, tensile, flexural, and hardness), heat deflection temperature (HDT), Vicat softening temperature, and scanning electron microscopy (SEM). Increased elastic modulus, shore D hardness, HDT, and Vicat related to neat PPs were reached. Nevertheless, losses in impact and tensile strength as well as in elongation at break were also verified. These lower data may be associated with the wood agglomeration, as shown in SEM images. Apparently, the investigated properties were not affected by PP viscosities, where both of them presented similar data. Summing up, presented results can be considered commercially feasible, focusing at economic and environmental benefits while producing higher performance products.
Eduardo Da Silva Barbosa Ferreira; Carlos Bruno Barreto Luna; Edcleide Maria Araújo; Danilo Diniz Siqueira; Renate Maria Ramos Wellen. Polypropylene/wood powder composites: Evaluation of PP viscosity in thermal, mechanical, thermomechanical, and morphological characters. Journal of Thermoplastic Composite Materials 2019, 1 .
AMA StyleEduardo Da Silva Barbosa Ferreira, Carlos Bruno Barreto Luna, Edcleide Maria Araújo, Danilo Diniz Siqueira, Renate Maria Ramos Wellen. Polypropylene/wood powder composites: Evaluation of PP viscosity in thermal, mechanical, thermomechanical, and morphological characters. Journal of Thermoplastic Composite Materials. 2019; ():1.
Chicago/Turabian StyleEduardo Da Silva Barbosa Ferreira; Carlos Bruno Barreto Luna; Edcleide Maria Araújo; Danilo Diniz Siqueira; Renate Maria Ramos Wellen. 2019. "Polypropylene/wood powder composites: Evaluation of PP viscosity in thermal, mechanical, thermomechanical, and morphological characters." Journal of Thermoplastic Composite Materials , no. : 1.
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.
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.
Carlos Bruno Barreto Luna; Felipe Belchior Calheiro Gomes; Eduardo Da Silva Barbosa Ferreira; Edcleide Maria Araújo; Rodholfo Da Silva Barbosa Ferreira; Renate Maria Ramos Wellen. Photo-degradation of PS/SBRr blends compatibilized with SEBS. Materials Research Express 2019, 6, 095327 .
AMA StyleCarlos Bruno Barreto Luna, Felipe Belchior Calheiro Gomes, Eduardo Da Silva Barbosa Ferreira, Edcleide Maria Araújo, Rodholfo Da Silva Barbosa Ferreira, Renate Maria Ramos Wellen. Photo-degradation of PS/SBRr blends compatibilized with SEBS. Materials Research Express. 2019; 6 (9):095327.
Chicago/Turabian StyleCarlos Bruno Barreto Luna; Felipe Belchior Calheiro Gomes; Eduardo Da Silva Barbosa Ferreira; Edcleide Maria Araújo; Rodholfo Da Silva Barbosa Ferreira; Renate Maria Ramos Wellen. 2019. "Photo-degradation of PS/SBRr blends compatibilized with SEBS." Materials Research Express 6, no. 9: 095327.
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.
RESUMO O reômetro de torque é um equipamento que reproduz em escala laboratorial o processamento de polímeros. Neste equipamento, a velocidade de rotação dos rotores, temperatura e tempo de processamento são parâmetros predeterminados e impostos ao sistema investigado; avalia-se o torque necessário para a fusão, mistura e homogeneização da amostra. Através do gráfico do torque em função do tempo e do gráfico da temperatura em função do tempo de processamento, cujos valores estão relacionados com as propriedades reológicas, estrutura e massa molar das amostras, é possível obter informações sobre o comportamento dos polímeros em fluxo, ou seja, durante o processamento. Neste trabalho, foi investigado o efeito do polietileno graftizado com ácido acrílico (PEgAA) e do polietileno graftizado com anidrido maléico (PEgMA) no biopolietileno (Bio-PE) e no poli(ε-caprolactona) (PCL) por reometria de torque. Foi verificado que o PEgAA e o PEgMA promoveram aumento no torque dos sistemas Bio-PE/PEgAA, Bio-PE/PEgMA, PCL/PEgAA e PCL/PEgMA, possivelmente resultante de interações e/ou reações químicas ocorridas nesses sistemas poliméricos. Espectros de FTIR evidenciaram possíveis interações e/ou reações químicas entre os grupos funcionais dos polímeros grafitizados e o Bio-PE e o PCL. Valores de torque mais altos foram observados nos sistemas com parâmetros de solubilidade (δ) mais próximos, corroborando com os cálculos propostos por Hansen.
Elieber Barros Bezerra; Danyelle Campos De França; Dayanne Diniz De Souza Morais; Eduardo Silva Barbosa Ferreira; Edcleide Maria Araújo; Renate Maria Ramos Wellen. Comportamento reológico do Bio-PE e do PCL na presença do PEgAA e PEgMA. Matéria (Rio de Janeiro) 2017, 22, 1 .
AMA StyleElieber Barros Bezerra, Danyelle Campos De França, Dayanne Diniz De Souza Morais, Eduardo Silva Barbosa Ferreira, Edcleide Maria Araújo, Renate Maria Ramos Wellen. Comportamento reológico do Bio-PE e do PCL na presença do PEgAA e PEgMA. Matéria (Rio de Janeiro). 2017; 22 (1):1.
Chicago/Turabian StyleElieber Barros Bezerra; Danyelle Campos De França; Dayanne Diniz De Souza Morais; Eduardo Silva Barbosa Ferreira; Edcleide Maria Araújo; Renate Maria Ramos Wellen. 2017. "Comportamento reológico do Bio-PE e do PCL na presença do PEgAA e PEgMA." Matéria (Rio de Janeiro) 22, no. 1: 1.