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论文类型：期刊论文

发表时间：2011-02-01

发表刊物：JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY

收录刊物：SCIE、EI

卷号：103

期号：2

页面范围：701-710

ISSN号：1388-6150

关键字：Crystallization; Isotactic polypropylene; Magnesium salt whisker; Melting behavior

摘要：Crystallization behavior of isotactic polypropylene (iPP)/magnesium salt whisker (MSW) composites modified by compatibilizer PP-g-MAH was studied under both isothermal and nonisothermal conditions. Analysis of the isothermal crystallization showed that the Avrami model successfully described the crystallization process. On the basis of Lauritzen-Hoffman theory, a regime transition was observed at about 139 A degrees C for the iPP/MSW composite, and a decrease in the fold surface free energy was calculated with the addition of MSW and PP-g-MAH. The addition of MSW filler and PP-g-MAH compatibilizer distinctly improved the crystallization temperature and accelerated the total crystallization rate of iPP. It was observed that MSW induced the formation of beta-iPP but PP-g-MAH suppressed the formation of beta-iPP.