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Berenika Hausnerova
Department of Production Engineering, Faculty of Technology, Tomas Bata University in Zlín, Zlin, Czech Republic

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Original contribution
Published: 20 July 2021 in Rheologica Acta
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Transdermal therapeutic systems (TTS) based on pressure-sensitive adhesives (PSAs) allow for the application of pharmaceutical substances via diffusion through the skin. The rheological performance of PSA is largely investigated within small amplitude oscillatory shear (typically up to 1 %), although the skin motions exceed strains beyond 40 %. In this paper, amine-compatible (AC) and non-amine-compatible (NAC) silicone-based PSA compounds differing in the resin content were subjected to strain amplitude sweeps in a twin drive rheometer. Carreau-Yasuda-like fitting of storage and loss moduli curves intercepts the substantial effect of resin content on both compounds; up to four times higher, moduli of AC compounds were determined in SAOS, and their higher molecular mass combined with enhanced interactions contributed to an earlier transition to the nonlinear viscoelastic region. In the nonlinear range, elastic and viscous properties are affected by strains in a different manner with the trend favorable for the PSA application as TTS. The third relative higher harmonic from Fourier transformation I3/1 as well as intra-cycle strain stiffening and shear thickening ratios provide information relevant for an optimization of PSA subjected to large deformations.

ACS Style

Michael Meurer; Roland Kádár; Esther Ramakers-Van Dorp; Bernhard Möginger; Berenika Hausnerova. Nonlinear oscillatory shear tests of pressure-sensitive adhesives (PSAs) designed for transdermal therapeutic systems (TTS). Rheologica Acta 2021, 1 -18.

AMA Style

Michael Meurer, Roland Kádár, Esther Ramakers-Van Dorp, Bernhard Möginger, Berenika Hausnerova. Nonlinear oscillatory shear tests of pressure-sensitive adhesives (PSAs) designed for transdermal therapeutic systems (TTS). Rheologica Acta. 2021; ():1-18.

Chicago/Turabian Style

Michael Meurer; Roland Kádár; Esther Ramakers-Van Dorp; Bernhard Möginger; Berenika Hausnerova. 2021. "Nonlinear oscillatory shear tests of pressure-sensitive adhesives (PSAs) designed for transdermal therapeutic systems (TTS)." Rheologica Acta , no. : 1-18.

Research article
Published: 08 July 2020 in Applied Materials Today
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In additive manufacturing based on the material extrusion of filled polymer melts, a correct description of the rheological behaviour of the processed material is an important requirement. In case of highly filled feedstocks, complexities connected with a proper flow description are not only caused by the high packaging of powder particles (more than 50 vol.%) but also by the notable participation of polymer binder components in the quantification of shear viscosity. In this study, analytical expressions (master curves) of a true shear viscosity are developed to follow and continuously optimize the rheological dependence of the bulk feedstock on particular variables. A nickel-chromium-based compound (Inconel 718, content 59 vol.%) with thermoplastic binders of different molecular weight of polyethylene glycol was selected for the case study. The proposed master curves comprise simultaneously hitherto separately applied two corrections of an apparent shear viscosity: regarding the different capillary geometries with respect to entrance pressure and outlet extension, and determining an actual velocity profile based on shear rate distribution inside a feedstock. This approach eliminates the hitherto used non-Newtonian index, by means of which the logarithmic derivative was approximated. As the master curves depend exclusively on the shear rate and molecular weight of polyethylene glycol and do not involve any adjustable parameter, their application is straightforward. Their accuracy does not exceed experimental errors.

ACS Style

Petr Filip; Berenika Hausnerová; Eva Hnátková. Continuous rheological description of highly filled polymer melts for material extrusion. Applied Materials Today 2020, 20, 100754 .

AMA Style

Petr Filip, Berenika Hausnerová, Eva Hnátková. Continuous rheological description of highly filled polymer melts for material extrusion. Applied Materials Today. 2020; 20 ():100754.

Chicago/Turabian Style

Petr Filip; Berenika Hausnerová; Eva Hnátková. 2020. "Continuous rheological description of highly filled polymer melts for material extrusion." Applied Materials Today 20, no. : 100754.

Journal article
Published: 05 June 2020 in Polymers
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In this study, environmentally convenient highly metal powder filled feedstocks intended for powder injection molding is presented. The composition of 60 vol % 316L stainless steel gas atomized powder feedstocks containing semicrystalline waxes: acrawax or carnauba wax and paraffin wax, combined with polyethylene glycol and modifier, was optimized to provide defect-free parts. Rheological as well as thermogravimetric analyses supported with scanning electron microscopy and metallography were employed to set up optimum conditions for molding, debinding and sintering. The performance of the novel feedstock was compared with currently available polyolefines-based materials, and results showed an efficiency enhancement due to the substantially lower (about 100 °C) mixing and molding temperatures as well as a reduction of debinding and sintering times at the simultaneous achievement of better mechanical properties in terms of elongation and tensile strength, in comparison to the mass production feedstock.

ACS Style

Berenika Hausnerova; Martin Novak. Environmentally Efficient 316L Stainless Steel Feedstocks for Powder Injection Molding. Polymers 2020, 12, 1296 .

AMA Style

Berenika Hausnerova, Martin Novak. Environmentally Efficient 316L Stainless Steel Feedstocks for Powder Injection Molding. Polymers. 2020; 12 (6):1296.

Chicago/Turabian Style

Berenika Hausnerova; Martin Novak. 2020. "Environmentally Efficient 316L Stainless Steel Feedstocks for Powder Injection Molding." Polymers 12, no. 6: 1296.

Journal article
Published: 25 April 2020 in Powder Technology
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This work reports on an essential effect of rather slight size differences in water atomized 17–4PH stainless steel powder on resulting microstructure and dimensional tolerances of metal injection molding (MIM) parts. The powders of round to irregular shapes prepared in three different powder volume fractions were admixed into the paraffin wax/HDPE (50/50) binder in a double sigma mixer. After determination of critical solid loading, the rheological, molding, and sintering performance of 66 vol% solid loading feedstocks was tested on a complex-shaped MIM component. The slight differences in size fractions are reflected also in the powder shape, which was quantified through sphericity factor and aspect ratio by dynamic image analysis. The results indicate an increase in viscosity, flow instability and injection pressure, lower sintered density with enhanced dimensional deformations for feedstocks having higher amount of coarser (10−20) μm fraction accompanied with higher shape irregularity determined from sphericity factor and aspect ratio.

ACS Style

Bhimasena Nagaraj Mukund; Berenika Hausnerova. Variation in particle size fraction to optimize metal injection molding of water atomized 17–4PH stainless steel feedstocks. Powder Technology 2020, 368, 130 -136.

AMA Style

Bhimasena Nagaraj Mukund, Berenika Hausnerova. Variation in particle size fraction to optimize metal injection molding of water atomized 17–4PH stainless steel feedstocks. Powder Technology. 2020; 368 ():130-136.

Chicago/Turabian Style

Bhimasena Nagaraj Mukund; Berenika Hausnerova. 2020. "Variation in particle size fraction to optimize metal injection molding of water atomized 17–4PH stainless steel feedstocks." Powder Technology 368, no. : 130-136.

Journal article
Published: 05 February 2020 in Polymer
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Performance demands on injection- and blow-molded parts are steadily increasing. As a dimensional stability depends largely on shrinkage and warpage during/after processing, the process-induced changes should be taken into account in a mold design. To predict shrinkage, this study introduces an approach to model the thermal expansion based on an elementary volume unit cell consisting of stacked crystalline and amorphous layers. Its validation is performed with the help of the thermal expansions of injection- and blow-molded polyethylene parts measured with respect to the process directions by a dynamic mechanical analyzer in a tension mode. Differential scanning calorimetry measurements are carried out to obtain crystallinity as a function of temperature of the PE parts as an input parameter to calculate the thermal expansion. The additional utilization of the phase specific coefficients of thermal expansion (CTE) and Young's moduli taken from literature for the model showed that the measured thermal expansion lies between the calculated ultimate coefficient of thermal expansion. To adjust the ultimate CTE, the process-dependent tilting and rotation angles are fitted, and it seems that relaxation processes at elevated temperatures (which are not considered in the model yet) cause a deviation. Thus, the model yields a good agreement with the measured data up to a temperature of 70 °C.

ACS Style

Esther Ramakers-Van Dorp; Bernhard Möginger; Berenika Hausnerova. Thermal expansion of semi-crystalline polymers: Anisotropic thermal strain and crystallite orientation. Polymer 2020, 191, 122249 .

AMA Style

Esther Ramakers-Van Dorp, Bernhard Möginger, Berenika Hausnerova. Thermal expansion of semi-crystalline polymers: Anisotropic thermal strain and crystallite orientation. Polymer. 2020; 191 ():122249.

Chicago/Turabian Style

Esther Ramakers-Van Dorp; Bernhard Möginger; Berenika Hausnerova. 2020. "Thermal expansion of semi-crystalline polymers: Anisotropic thermal strain and crystallite orientation." Polymer 191, no. : 122249.

Journal article
Published: 25 December 2019 in Polymer Testing
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Although applied for several decades, production of hollow plastic parts by extrusion blow molding (EBM) is still over-dimensioned. To overcome this issue, a thorough investigation of the process-structure-property relationship is required. In this study, the local process-structure-property relationship for high-density polyethylene EBM containers is analyzed with differential scanning calorimetry and dynamic mechanic analysis microindentation. Local process-dependent crystallinity and complex modulus data at various processing conditions are supplemented with wide-angle X-ray diffraction and transmission electron microscopy (TEM). The crystallinities and the complex moduli clearly show lower values close to the mold side than at the inner side and the middle of the cross-section, which reflects the temperature gradient during processing. Additionally, the orientation of the polymer chain (c-axis) reveals a low level of biaxiality with a slight tendency towards transverse direction. The biaxiality increases for low mold temperature and high draw ratio. Finally, biaxiality is confirmed with TEM, which reveals no preferred lamellar orientation.

ACS Style

Esther Ramakers-Van Dorp; Benedikt Eger; Clemens Raschen; Michal Urbanek; Bernhard Möginger; Berenika Hausnerova. Local process-dependent structural and mechanical properties of extrusion blow molded high-density polyethylene hollow parts. Polymer Testing 2019, 82, 106314 .

AMA Style

Esther Ramakers-Van Dorp, Benedikt Eger, Clemens Raschen, Michal Urbanek, Bernhard Möginger, Berenika Hausnerova. Local process-dependent structural and mechanical properties of extrusion blow molded high-density polyethylene hollow parts. Polymer Testing. 2019; 82 ():106314.

Chicago/Turabian Style

Esther Ramakers-Van Dorp; Benedikt Eger; Clemens Raschen; Michal Urbanek; Bernhard Möginger; Berenika Hausnerova. 2019. "Local process-dependent structural and mechanical properties of extrusion blow molded high-density polyethylene hollow parts." Polymer Testing 82, no. : 106314.

Journal article
Published: 01 October 2019 in Manufacturing Technology
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Detail záznamu - Cooling aluminium coils by outdoor air - Detailní zobrazení záznamu - Vědecká knihovna UJEP

ACS Style

Dieter Sedlacek; Berenika Hausnerová. Cooling Aluminium Coils by Outdoor Air. Manufacturing Technology 2019, 19, 848 -854.

AMA Style

Dieter Sedlacek, Berenika Hausnerová. Cooling Aluminium Coils by Outdoor Air. Manufacturing Technology. 2019; 19 (5):848-854.

Chicago/Turabian Style

Dieter Sedlacek; Berenika Hausnerová. 2019. "Cooling Aluminium Coils by Outdoor Air." Manufacturing Technology 19, no. 5: 848-854.

Journal article
Published: 27 June 2019 in Ceramics International
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Processability of ceramics via injection molding consists in reaching sufficiently high solid loading despite submicrometric size of Al2O3 ceramic particles with a correspondingly high specific surface area. High (critical) solid loading limits injection molding reflected by flow properties of the compounds. This paper is focused on the evaluation of the critical solid loading (CSL) parameter as well as reliable description of the flow properties. As surface active agents are usually incorporated in polymer binders, most often used stearic acid (SA) is combined with three different binders to achieve higher CSL. CSL is determined from evolution of mixing torque based on continuously increasing powder loading from 50 to 60 vol %. Flowability of Al2O3 feedstocks with a fixed powder loading (52 vol %) was analyzed with a capillary rheometer, and viscosity data were predicted by a master curve model representing a fixed functional structure with no adjustable (fitting) parameters. The only variables are shear rate and surface agent (SA) concentration. A deviation from the experimental data does not exceed an experimental error.

ACS Style

Eva Hnátková; Berenika Hausnerova; Petr Filip. Evaluation of powder loading and flow properties of Al2O3 ceramic injection molding feedstocks treated with stearic acid. Ceramics International 2019, 45, 20084 -20090.

AMA Style

Eva Hnátková, Berenika Hausnerova, Petr Filip. Evaluation of powder loading and flow properties of Al2O3 ceramic injection molding feedstocks treated with stearic acid. Ceramics International. 2019; 45 (16):20084-20090.

Chicago/Turabian Style

Eva Hnátková; Berenika Hausnerova; Petr Filip. 2019. "Evaluation of powder loading and flow properties of Al2O3 ceramic injection molding feedstocks treated with stearic acid." Ceramics International 45, no. 16: 20084-20090.

Proceedings article
Published: 21 May 2019 in Preface: Novel Trends in Rheology VIII
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The feedstocks used in Powder Injection Moulding (PIM) are formed by solid particles incorporated into a binder with presence of surfactant enabling manufacturing of highly concentrated suspensions. Relatively even distribution of particles is violated in the close vicinity of the walls. A thin layer adjacent to the walls is pre-dominantly occupied by the binder only and at the interface wall-binder so-called wall slip occurs. Success and acceptance of an injection moulding step in PIM process primarily subjects to this wall slip phenomenon. The wall slip was qualitatively and quantitatively measured using a capillary rheometer equipped with the dies of different entrance angles. It was proved that this differentness has a significant impact on an appearance of wall slip (its intensity). Using four PIM feedstocks reliable slip velocity values of highly filled compounds were obtained for conical dies contrasting to the results with flat dies used in the majority of studies.

ACS Style

Petr Filip; Berenika Hausnerova; Daniel Sanetrnik; Eva Hnatkova. Wall slip of highly filled powder injection moulding compounds in dependence on capillary die geometry. Preface: Novel Trends in Rheology VIII 2019, 2107, 030005 .

AMA Style

Petr Filip, Berenika Hausnerova, Daniel Sanetrnik, Eva Hnatkova. Wall slip of highly filled powder injection moulding compounds in dependence on capillary die geometry. Preface: Novel Trends in Rheology VIII. 2019; 2107 (1):030005.

Chicago/Turabian Style

Petr Filip; Berenika Hausnerova; Daniel Sanetrnik; Eva Hnatkova. 2019. "Wall slip of highly filled powder injection moulding compounds in dependence on capillary die geometry." Preface: Novel Trends in Rheology VIII 2107, no. 1: 030005.

Journal article
Published: 13 May 2019 in Polymer Testing
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Extrusion blow molding (EBM) is a manufacturing technique to produce plastic hollow containers. Requirements on complex geometries are steadily increasing, especially in packaging and automotive, although some issues of EBM remain unclear. Consequently, EBM parts are still over-dimensioned. Thus, processing-structure-properties relationship is investigated via dynamic mechanical analysis and differential scanning calorimetry. Storage modulus and crystallinity data were obtained at various flow directions, draw ratios and mold temperatures. The data evaluation of the influence of these three parameters on the storage modulus proved as statistically significant, process-dependent, for specific measuring temperature ranges. Relaxation processes during sample storage and elevated measuring temperatures can explain the process independency for the flow direction and the draw ratio for specific measuring temperature ranges from which the mold temperature was unaffected. Mold temperature and draw ratio had a significant influence on crystallinity of EBM containers; higher mold temperature and draw ratio caused higher crystallinities due to the flow-induced orientation.

ACS Style

Esther Ramakers-Van Dorp; Christian Blume; Tobias Haedecke; Vladimir Pata; Dirk Reith; Olaf Bruch; Bernhard Möginger; Berenika Hausnerova. Process-dependent structural and deformation properties of extrusion blow molding parts. Polymer Testing 2019, 77, 105903 .

AMA Style

Esther Ramakers-Van Dorp, Christian Blume, Tobias Haedecke, Vladimir Pata, Dirk Reith, Olaf Bruch, Bernhard Möginger, Berenika Hausnerova. Process-dependent structural and deformation properties of extrusion blow molding parts. Polymer Testing. 2019; 77 ():105903.

Chicago/Turabian Style

Esther Ramakers-Van Dorp; Christian Blume; Tobias Haedecke; Vladimir Pata; Dirk Reith; Olaf Bruch; Bernhard Möginger; Berenika Hausnerova. 2019. "Process-dependent structural and deformation properties of extrusion blow molding parts." Polymer Testing 77, no. : 105903.

Journal article
Published: 08 May 2019 in Polymers
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This study presents a microindentation system which allows spatially resolved local as well as bulk viscoelastic material information to be obtained within one instrument. The microindentation method was merged with dynamic mechanical analysis (DMA) for a tungsten cone indenter. Three tungsten cone indenters were investigated: tungsten electrode, tungsten electrode + 2% lanthanum, and tungsten electrode + rare earth elements. Only the tungsten electrode + 2% lanthanum indenter showed the sinusoidal response, and its geometry remained unaffected by the repeated indentations. Complex moduli obtained from dynamic microindentation for high-density polyethylene, polybutylene terephthalate, polycarbonate, and thermoplastic polyurethane are in agreement with the literature. Additionally, by implementing a specially developed x-y-stage, this study showed that dynamic microindentation with a tungsten cone indenter was an adequate method to determine spatially resolved local viscoelastic surface properties.

ACS Style

Esther Ramakers-Van Dorp; Thomas Haenel; Dominik Ciongwa; Bernhard Möginger; Berenika Hausnerova. Development of an Advanced Dynamic Microindentation System to Determine Local Viscoelastic Properties of Polymers. Polymers 2019, 11, 833 .

AMA Style

Esther Ramakers-Van Dorp, Thomas Haenel, Dominik Ciongwa, Bernhard Möginger, Berenika Hausnerova. Development of an Advanced Dynamic Microindentation System to Determine Local Viscoelastic Properties of Polymers. Polymers. 2019; 11 (5):833.

Chicago/Turabian Style

Esther Ramakers-Van Dorp; Thomas Haenel; Dominik Ciongwa; Bernhard Möginger; Berenika Hausnerova. 2019. "Development of an Advanced Dynamic Microindentation System to Determine Local Viscoelastic Properties of Polymers." Polymers 11, no. 5: 833.

Journal article
Published: 06 March 2019 in Polymers
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Wall slip in the flow of powder injection molding (PIM) compounds can be the cause of unrealistically low viscosity values, and can lead to a failure of flow simulation approaches. Regardless of its importance, it has been considered only scarcely in the rheological models applied to PIM materials. In this paper, an online extrusion rheometer equipped with rectangular slit dies was used to evaluate the slip velocity of commercial as well as in-house-prepared PIM feedstocks based on metallic and ceramic powders at close-to-processing conditions. The tested slit dies varied in their dimensions and surface roughness. The wall-slip effect was quantified using the Mooney analysis of slip velocities. The smaller gap height (1 mm) supported the wall-slip effect. It was shown that both the binder composition and the powder characteristic affect slip velocity. Slip velocity can be reduced by tailoring a powder particle size distribution towards smaller particle fractions. The thickness of the polymer layer formed at the channel wall is higher for water-soluble feedstocks, while in the case of the catalytic polyacetal feedstocks the effect of surface roughness was manifested through lower viscosity at smooth surfaces.

ACS Style

Daniel Sanetrnik; Berenika Hausnerova; Vladimir Pata. Online Rheometry Investigation of Flow/Slip Behavior of Powder Injection Molding Feedstocks. Polymers 2019, 11, 432 .

AMA Style

Daniel Sanetrnik, Berenika Hausnerova, Vladimir Pata. Online Rheometry Investigation of Flow/Slip Behavior of Powder Injection Molding Feedstocks. Polymers. 2019; 11 (3):432.

Chicago/Turabian Style

Daniel Sanetrnik; Berenika Hausnerova; Vladimir Pata. 2019. "Online Rheometry Investigation of Flow/Slip Behavior of Powder Injection Molding Feedstocks." Polymers 11, no. 3: 432.

Journal article
Published: 07 January 2019 in Ceramics International
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Compounds used for Ceramic Injection Molding (CIM) are rheologically complex materials. The applicability of currently available mathematical models to CIM systems fails due to high number of variables playing a significant role: binder composition, powder morphology and loading as well as concentration of processing aids. In this paper we present the way to overcome this issue with a model, where a set of its parameters is a priori given regardless the contents of powder or additional ingredients in a feedstock. Then, the relative viscosity of an individual composition of a CIM feedstock is obtained only by inserting the corresponding concentrations of powder (aluminium oxide) and additive (stearic acid). The proposed master curve exhibits the fixed functional structure common for 36 composition combinations arising from Al2O3 powder loading (0–50%) and stearic acid concentration (up to 5%). The deviation from the measured values does not exceed an experimental error.

ACS Style

Petr Filip; Berenika Hausnerova; Chiara Barretta. Master flow curves as a tool to modelling ceramic injection molding. Ceramics International 2019, 45, 7468 -7471.

AMA Style

Petr Filip, Berenika Hausnerova, Chiara Barretta. Master flow curves as a tool to modelling ceramic injection molding. Ceramics International. 2019; 45 (6):7468-7471.

Chicago/Turabian Style

Petr Filip; Berenika Hausnerova; Chiara Barretta. 2019. "Master flow curves as a tool to modelling ceramic injection molding." Ceramics International 45, no. 6: 7468-7471.

Journal article
Published: 01 December 2018 in Manufacturing Technology
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Detail záznamu - Surface properties of powder injection moulded parts related to processing conditions - Detail záznamu - Vědecká knihovna UJEP

ACS Style

Berenika Hausnerová; Daniel Sanétrník; Vladimír Pata. Surface Properties of Powder Injection Moulded Parts Related to Processing Conditions. Manufacturing Technology 2018, 18, 895 -899.

AMA Style

Berenika Hausnerová, Daniel Sanétrník, Vladimír Pata. Surface Properties of Powder Injection Moulded Parts Related to Processing Conditions. Manufacturing Technology. 2018; 18 (6):895-899.

Chicago/Turabian Style

Berenika Hausnerová; Daniel Sanétrník; Vladimír Pata. 2018. "Surface Properties of Powder Injection Moulded Parts Related to Processing Conditions." Manufacturing Technology 18, no. 6: 895-899.

Journal article
Published: 14 April 2018 in Polymer Testing
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Micro- and nanoindentation and Dynamic Mechanical Analysis (DMA) are different methods to determine mechanical and viscoelastic material properties. The aim of this study was to broaden the capabilities of their utilization by merging these methods. Three standard diamond indenters and a tungsten needle were implemented in a conventional DMA. Four types of standard polymers were investigated. Quasi-static microindentation was performed to determine local material static stiffness, and dynamic microindentation was performed to evaluate local material complex modulus. The results of the quasi-static microindentation showed that different static stiffnesses of the polymers can be distinguished. Even the smallest differences in local mechanical properties due to processing and annealing were distinguished. The complex moduli determined by dynamic microindentation were in good agreement with literature values and three-point bending results. It was shown that a conventional DMA is suitable to determine local and bulk mechanical viscoelastic material properties within one instrument.

ACS Style

Esther Ramakers-Van Dorp; Thomas Haenel; Frank Sturm; Bernhard Möginger; Berenika Hausnerova. On merging DMA and microindentation to determine local mechanical properties of polymers. Polymer Testing 2018, 68, 359 -364.

AMA Style

Esther Ramakers-Van Dorp, Thomas Haenel, Frank Sturm, Bernhard Möginger, Berenika Hausnerova. On merging DMA and microindentation to determine local mechanical properties of polymers. Polymer Testing. 2018; 68 ():359-364.

Chicago/Turabian Style

Esther Ramakers-Van Dorp; Thomas Haenel; Frank Sturm; Bernhard Möginger; Berenika Hausnerova. 2018. "On merging DMA and microindentation to determine local mechanical properties of polymers." Polymer Testing 68, no. : 359-364.

Journal article
Published: 01 February 2018 in Powder Technology
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ACS Style

Daniel Sanetrnik; Berenika Hausnerova; Petr Filip; Eva Hnatkova. Influence of capillary die geometry on wall slip of highly filled powder injection molding compounds. Powder Technology 2018, 325, 615 -619.

AMA Style

Daniel Sanetrnik, Berenika Hausnerova, Petr Filip, Eva Hnatkova. Influence of capillary die geometry on wall slip of highly filled powder injection molding compounds. Powder Technology. 2018; 325 ():615-619.

Chicago/Turabian Style

Daniel Sanetrnik; Berenika Hausnerova; Petr Filip; Eva Hnatkova. 2018. "Influence of capillary die geometry on wall slip of highly filled powder injection molding compounds." Powder Technology 325, no. : 615-619.

Journal article
Published: 01 December 2017 in Powder Technology
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ACS Style

Eva Hnátková; Berenika Hausnerová; Andrew Hales; Lukas Jiranek; Fatos Derguti; Iain Todd. Processing of MIM feedstocks based on Inconel 718 powder and partially water-soluble binder varying in PEG molecular weight. Powder Technology 2017, 322, 439 -446.

AMA Style

Eva Hnátková, Berenika Hausnerová, Andrew Hales, Lukas Jiranek, Fatos Derguti, Iain Todd. Processing of MIM feedstocks based on Inconel 718 powder and partially water-soluble binder varying in PEG molecular weight. Powder Technology. 2017; 322 ():439-446.

Chicago/Turabian Style

Eva Hnátková; Berenika Hausnerová; Andrew Hales; Lukas Jiranek; Fatos Derguti; Iain Todd. 2017. "Processing of MIM feedstocks based on Inconel 718 powder and partially water-soluble binder varying in PEG molecular weight." Powder Technology 322, no. : 439-446.

Article
Published: 09 June 2017 in Polymer Engineering & Science
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In a novel binder system, carnauba wax (CW), and acrawax (AW) (N,N′-Ethylene Bis-stearamide) were considered to replace the synthetic backbone polymers (polyolefins) in aluminum oxide (Al2O3) Ceramic Injection Molding feedstocks. For both proposed substitutes there is a significant reduction in viscosity in comparison to polyolefin based binder and also commercially available one, and in case of CW based feedstock also in processing temperature, which is essential for injection molding of reactive powders. For all ceramic feedstocks studied, there is a nonmonotonous dependence of viscosity on shear rate/stress, whose fitting requires eight-parameter model. At the processing-relevant shear conditions, polyolefin based feedstocks show dilatant cause, whereas both CW and AW compounds have a pseudoplastic manner. Thermal characterization was used to evaluate i(miscibility) of the neat binder components, their mixtures and mixtures with Al2O3. The presence of powder lowered melting temperatures of all tested binders except of polyolefin. Further depression in melting point of poly(ethylene glycol) is observed in combination with polyolefin in the presence of powder, and it is related to changes in size of the crystalline domains. POLYM. ENG. SCI., 57:739–745, 2017. © 2017 Society of Plastics Engineers

ACS Style

Berenika Hausnerova; Vera Kasparkova; Eva Hnatkova. Effect of backbone binders on rheological performance of ceramic injection molding feedstocks. Polymer Engineering & Science 2017, 57, 739 -745.

AMA Style

Berenika Hausnerova, Vera Kasparkova, Eva Hnatkova. Effect of backbone binders on rheological performance of ceramic injection molding feedstocks. Polymer Engineering & Science. 2017; 57 (7):739-745.

Chicago/Turabian Style

Berenika Hausnerova; Vera Kasparkova; Eva Hnatkova. 2017. "Effect of backbone binders on rheological performance of ceramic injection molding feedstocks." Polymer Engineering & Science 57, no. 7: 739-745.

Journal article
Published: 01 May 2017 in Powder Technology
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ACS Style

Berenika Hausnerová; Bhimasena Nagaraj Mukund; Daniel Sanétrník. Rheological properties of gas and water atomized 17-4PH stainless steel MIM feedstocks: Effect of powder shape and size. Powder Technology 2017, 312, 152 -158.

AMA Style

Berenika Hausnerová, Bhimasena Nagaraj Mukund, Daniel Sanétrník. Rheological properties of gas and water atomized 17-4PH stainless steel MIM feedstocks: Effect of powder shape and size. Powder Technology. 2017; 312 ():152-158.

Chicago/Turabian Style

Berenika Hausnerová; Bhimasena Nagaraj Mukund; Daniel Sanétrník. 2017. "Rheological properties of gas and water atomized 17-4PH stainless steel MIM feedstocks: Effect of powder shape and size." Powder Technology 312, no. : 152-158.

Journal article
Published: 01 April 2017 in Powder Technology
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ACS Style

Dongguo Lin; Daniel Sanétrník; Hanlyun Cho; Seong Taek Chung; Young Sam Kwon; Kunal Kate; Berenika Hausnerová; Sundar V. Atre; Seong Jin Park. Rheological and thermal debinding properties of blended elemental Ti-6Al-4V powder injection molding feedstock. Powder Technology 2017, 311, 357 -363.

AMA Style

Dongguo Lin, Daniel Sanétrník, Hanlyun Cho, Seong Taek Chung, Young Sam Kwon, Kunal Kate, Berenika Hausnerová, Sundar V. Atre, Seong Jin Park. Rheological and thermal debinding properties of blended elemental Ti-6Al-4V powder injection molding feedstock. Powder Technology. 2017; 311 ():357-363.

Chicago/Turabian Style

Dongguo Lin; Daniel Sanétrník; Hanlyun Cho; Seong Taek Chung; Young Sam Kwon; Kunal Kate; Berenika Hausnerová; Sundar V. Atre; Seong Jin Park. 2017. "Rheological and thermal debinding properties of blended elemental Ti-6Al-4V powder injection molding feedstock." Powder Technology 311, no. : 357-363.