Rheological behavior of compatibilized and non-compatibilized PA6/EPM blends |
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Authors: | Jorge Silva Ana Vera Machado João Maia |
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Institution: | 1.Department of Polymer Engineering, IPC—Institute for Polymers and Composites,University of Minho,Guimar?es,Portugal |
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Abstract: | The rheological properties of PA-6/EPM polymer blends, non-compatibilized and compatibilized with grafted ethylene propylene
rubber (EPM-g-MA), have been investigated. Linear and non-linear (relaxation both in shear and extension) experiments were
realized. Stress relaxation experiments coupled with scanning electron microscopy (SEM) analysis showed the existence of one
relaxation time and non-deformed droplets for the immiscible blend, and two relaxation times and deformed droplets for the
compatibilized ones, the second relaxation being more pronounced for higher compatibilizer contents. These results clearly
indicate that, despite the high viscosity and elasticity ratios, if high amounts of compatibilizer are added to the blend,
interfacial slip is suppressed and a high-enough adhesion between the phases is achieved for the high-viscosity dispersed
phase to be deformed.
Paper presented at the 3rd Annual European Rheology Conference, April 27–29, 2006, Crete, Greece |
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Keywords: | Polymer blends Compatibilization Interface Nonlinear rheology PA-6/EPM blends Droplet deformation |
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