Authors: Lei Gong Bo Yin Lanpeng Li Mingbo Yang Banghu Xie Jianmin Feng
Publish Date: 2013/07/23
Volume: 70, Issue: 11, Pages: 2935-2952
Abstract
Polypropylene PP was blended with ethylene–propylene–diene terpolymer EPDM and calcium carbonate nanoparticles nanoCaCO3 where all the components were in different initial mixing states ie all in solid solid blending composite nanoCaCO3 and EPDM first forming solid master batch then being mixed with solid PP master batch blend composite and all in melt melt blending composite The phase morphology especially the distribution of nanoCaCO3 and mechanical properties of the resultant composites and their dependence on the initial mixing states of the components were studied systematically Morphological observation revealed that essentially different from the respectively dispersed morphology of nanoCaCO3 particles and EPDM phase in the PP matrix in the solid blending composite abundant welldispersed nanoCaCO3 particles concentrating around EPDM phase in the melt blending composite Due to the cavitation initiated by the debonding and the fibrillation present at interface as a result of welldispersed nanoCaCO3 particles its impact strength was pronouncedly enhanced increasing 280 compared to PP/EPDM composite Our work paves the way to obtain highperformance PP compositesThe authors gratefully acknowledge the financial support from the National Natural Science Foundation of China Contract No 51273219 Thanks go to Prof GuoQiang Pan and Mr LiHui Wu from National Synchrotron Radiation Laboratory China for synchrotron WAXS measurements
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