Modeling and Simulation of Deformation Texture in Semi-Crystalline Polymers: Application to Polypropylene and Nylon-6

Ahzi, Saı̈d; Ganesan, A.; Arruda, Ellen M.

doi:10.4028/www.scientific.net/msf.408-412.1723

Cited by 5 publications

(4 citation statements)

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“…This also shows that the PP rich blends have a higher shear thinning ability as compared to the PA11 rich blends. Thus the BC blend with PA11 doses of 80% and 60% can be processed more easily without imparting abrasion and torque to the screw in an extrusion process 84 . Figure 6(b) shows the complex viscosity of the compatibilized blend of PA11/PP for various compositions.…”

Section: Resultsmentioning

confidence: 99%

“…Thus the BC blend with PA11 doses of 80% and 60% can be processed more easily without imparting abrasion and torque to the screw in an extrusion process. 84 Figure 6(b) shows the complex viscosity of the compatibilized blend of PA11/PP for various compositions. The values for complex viscosity was found to be higher for the compatibilized binary systems when compared to its noncompatibilized form.…”

Section: Complex Viscositymentioning

confidence: 99%

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Morphological properties, rheological behaviors, and phase interaction of nylon 11/polypropylene blends by in situ reactive compatibilization and dispersion through polyhydroxybutyrate

Gadgeel

Mhaske

2020

J of Applied Polymer Sci

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The current research discusses the reactive compatibilization of nylon 11 (PA11) and polypropylene (PP) using maleic anhydride grafted PP (PP-g-MA) through an extruder. PP phase is dispersed in PA11 by coalescence and droplet break-up mechanism by using polyhydroxybutyrate (PHB) as a dispersion agent that induces uniform interaction between the blend components. The reactive compatibilization ensures the mixing of polymers, and the consistent interaction of phases is controlled by dispersion. All of the blends were processed through melt processing at different compositions using a twinscrew extruder. Scanning electron microscopy was used to determine the morphologies of the binary and ternary blends. Surface tension and interfacial tension of the homopolymer characterizes the interaction of the polymers at interphase. The interaction of PHB/PA11 appeared preferable than that of PHB/PP, elaborating on the efficient dispersion and droplet formation of the PP phase. The compatibilizer maleic anhydride grafted PP (PP-g-MA) imparts a drastic effect on the compatibility of PA11-PP and PA11-PHB-PP blends and reduces PP phase particle size, which indicates the affinity of PHB and PP. The encapsulation of PP by PHB was seen in the expectation of minimum free energy models. The rheological measurements were used to understand the phase separation within blends. These measurements were also applied to understand the interaction between PA11-PP-PHB phases. The modulus values and viscosity ratio of the blends were measured to follow the chain relaxation in the melt. In the Cole-Cole plot, it was found that the reduction in PP phase size influences the relaxation of chains of blends.

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Section: Resultsmentioning

confidence: 99%

Section: Complex Viscositymentioning

confidence: 99%

Morphological properties, rheological behaviors, and phase interaction of nylon 11/polypropylene blends by in situ reactive compatibilization and dispersion through polyhydroxybutyrate

Gadgeel

Mhaske

2020

J of Applied Polymer Sci

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“…However, the mechanical responses at the highest strain rate show a greater post-yield strain softening attributing mainly to self-heating effect [20]. Indeed, during the plastic deformation, due to the low chain mobility coupled with internal friction, a great part of the plastic deformation work is converted into heat in the materials [21]. Comparing the mechanical responses of 108MF97 and 7510 (0P or 6P) at same strain rates, the curves of 7510 show the more important post-yield strain softening.…”

Section: Methodsmentioning

confidence: 99%

Constitutive Modeling of the Tensile Behavior of Recycled Polypropylene Based Composites

Wang

Peng

Boumbimba

et al. 2019

Preprint

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The effect of reprocessing on the quasi-static uniaxial tensile behavior of two commercial polypropylene (PP) based composites is experimentally investigated and modeled. In particular, the studied materials consist of an unfilled high-impact PP and a talc-filled high-impact PP. These PP composites are subjected to repeated processing cycles including a grinding step and an extrusion step to simulate recycling at the laboratory level, the selected reprocessing numbers for this study being 0, 3, 6, 9 and 12. Because the repeated reprocessing leads to thermo-mechanical degradation by chain scission mechanisms, the tensile behavior of the two materials exhibits a continuous decrease of elastic modulus and failure strain with increasing number of reprocessing. A physically consistent three-dimensional constitutive model is used to predict the tensile response of non-recycled materials with strain rate dependence. For the recycled materials, the reprocessing effect is accounted by incorporating the reprocessing sensitive coefficient into the constitutive model for Young’s modulus, failure strain, softening and hardening equations. Our predictions of true stress - true strain curves for non-recycled and recycled 108MF97 and 7510 are in a good agreement with experimental data.

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“…However, the mechanical responses at the highest strain rate show a greater post-yield strain softening, attributing mainly to the self-heating effect [20]. Indeed, during the plastic deformation, due to the low chain mobility coupled with internal friction, a large part of the plastic deformation work is converted into heat in the materials [21]. Comparing the mechanical responses of 108MF97 and 7510 (0P or 6P) at the same strain rates, the curves of 7510 show the more important post-yield strain softening.…”

Section: Experimental Studymentioning

confidence: 99%

Constitutive Modeling of the Tensile Behavior of Recycled Polypropylene-Based Composites

et al. 2019

View full text Add to dashboard Cite

The effect of reprocessing on the quasi-static uniaxial tensile behavior of two commercial polypropylene (PP)-based composites is experimentally investigated and modeled. In particular, the studied materials consist of an unfilled high-impact PP and a talc-filled high-impact PP. These PP composites are subjected to repeated processing cycles, including a grinding step and an extrusion step to simulate recycling at the laboratory level, the selected reprocessing numbers for this study being 0, 3, 6, 9, and 12. Because the repeated reprocessing leads to thermo-mechanical degradation by chain scission mechanisms, the tensile behavior of the two materials exhibits a continuous decrease of elastic modulus and failure strain with the increasing amount of reprocessing. A physically consistent three-dimensional constitutive model is used to predict the tensile response of non-recycled materials with strain rate dependence. For the recycled materials, the reprocessing effect is accounted by incorporating the reprocessing sensitive coefficient into the constitutive model for Young’s modulus, failure strain, softening, and hardening equations. Our predictions of true stress—true strain curves for non-recycled and recycled 108MF97 and 7510—are in good agreement with experimental data and can be useful for industries and companies which are looking for a model able to predict the recycling effect on mechanical behavior of polymer-based materials.

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Modeling and Simulation of Deformation Texture in Semi-Crystalline Polymers: Application to Polypropylene and Nylon-6

Cited by 5 publications

References 0 publications

Morphological properties, rheological behaviors, and phase interaction of nylon 11/polypropylene blends by in situ reactive compatibilization and dispersion through polyhydroxybutyrate

Morphological properties, rheological behaviors, and phase interaction of nylon 11/polypropylene blends by in situ reactive compatibilization and dispersion through polyhydroxybutyrate

Constitutive Modeling of the Tensile Behavior of Recycled Polypropylene Based Composites

Constitutive Modeling of the Tensile Behavior of Recycled Polypropylene-Based Composites

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