Synergistic effects of toughening of nano-CaCO3 and toughness of β-polypropylene |
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| Authors: | Zishou ZhangChunguang Wang Yuezhong MengKancheng Mai |
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| Affiliation: | a Materials Science Institute, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Key Laboratory of Polymeric Composites and Functional Materials, The Ministry of Education, Key Laboratory of Designed Synthesis and Application of Polymer Material of Guangdong Province, Guangzhou 510275, China
b The Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province, State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China |
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| Abstract: | High performance β-polypropylene (β-PP) nanocomposites were prepared by nano-CaCO3 with β-nucleation (β-CC) filled PP, and the crystallization and mechanical properties of β-PP nanocomposites were investigated. The results show that β-CC prepared by nano-CaCO3 supported β-nucleating agent calcium pimelate (CaPA) does not only increase the crystallization temperature of PP, but also induce the forming of a number of β-PP. It indicates that the nucleation mechanism of nano-CaCO3 has been changed from α- to β-nucleation. The notched impact strength of β-CC filled PP nanocomposites was higher than that of CC filled PP and CaPA nucleated PP. It is suggested that there is a synergistic effect of toughening of CC and toughness of β-PP. Meanwhile, the reinforcing of CC nanoparticles increased the stiffness of β-PP. The synergistic toughening effect of CC and β-PP was discussed. This method can be extended to prepare other high performance filled β-PP composites. |
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| Keywords: | A Polymer-matrix composites (PMCs) B Mechanical properties D Thermal analysis E Extrusion |
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