Isothermal Crystallization Behaviors of Isotactic Polypropylene Nucleated with Nucleating Agent Bicyclic [2,2,1] heptane di-carboxylate

被引：5

作者：

Zhang, Yue-Fei ^{[1
]}

Li, Xun ^{[1
]}

Wei, Xian-Shan ^{[1
]}

机构：

[1] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China

来源：

JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS | 2009年 / 48卷 / 06期

基金：

国家高技术研究发展计划(863计划);

关键词：

bicyclic [2,2,1] heptane di-carboxylate; isotactic polypropylene; isothermal crystallization; nucleating agent; HETEROCYCLIC PHOSPHATE SALTS; NONISOTHERMAL CRYSTALLIZATION; ORGANIC PHOSPHORUS; KINETICS; MORPHOLOGY; MELT;

D O I：

10.1080/00222340903275693

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Bicyclic [2,2,1] heptane di-carboxylate (commercial product name: HPN-68) is a novel nucleating agent with high nucleation efficiency for alpha-iPP. In this article, differential scanning calorimetry (DSC) was adopted to investigate the isothermal crystallization kinetics of isotactic polypropylene (iPP) nucleated with HPN-68. The Avrami equation well described the isothermal crystallization kinetics of iPP nucleated with HPN-68. The results showed that addition of HPN-68 could shorten half crystallization time (t(1/2)) and increase the crystallization rate of iPP significantly. The Avrami exponents of both virgin iPP and iPP nucleated with HPN-68 were close to 3.0, which indicated that the addition of nucleating agent HPN-68 didn't change the crystallization growth patterns of iPP under isothermal conditions and the crystal growth was heterogeneously nucleated three-dimensional spherulitic growth. In addition, incorporation of nucleating agent HPN-68 obviously decreased the crystallization activation energy Delta E of iPP, from 368 kJ/mol for virgin iPP to 306 kJ/mol.

引用

页码：1125 / 1131

页数：7

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