期刊
EUROPEAN POLYMER JOURNAL
卷 40, 期 4, 页码 679-684出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2003.12.004
关键词
polypropylene; beta-phase; CaCO3 filler; tensile properties
Commercial-grade polypropylene was modified with a specific nucleation agent based on an amide of dicarboxylic acid, which promotes crystallization predominantly in the beta-phase. The resulting material was used as a matrix for composites containing 10%, 20%, and 30% (by weight) of different calcium carbonate fillers. These fillers differed in particle size and surface treatment. The beta-phase content, morphology and tensile mechanical properties were investigated. A distinct beta-nucleation activity was found with surface-treated fillers; nevertheless, to obtain stiff and reasonably ductile composite materials, a matrix containing a critical nucleant concentration (0.03 wt%) was necessary. (C) 2004 Elsevier Ltd. All rights reserved.
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