文献类型：期刊文献

中文题名：降冰片烯二羧酸盐类成核剂在等规聚丙烯中的成核效应

英文题名：Nucleation Efficiency of BicycloHept-5-Ene-2,3-Dicarboxylate Salts as Nucleators for Isotactic Polypropylene

作者：赵世成[1];辛忠[1];盛波扬[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,产品工程系,上海200237

年份：2009

卷号：25

期号：3

起止页码：46

中文期刊名：高分子材料科学与工程

外文期刊名：Polymer Materials Science & Engineering

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金资助项目(20876042)

语种：中文

中文关键词：等规聚丙烯;烷基二羧酸盐;成核剂;结晶动力学

外文关键词：isotactic polypropylene （iPP）; alkyl dicarboxylate; nucleating agent; crystallization kinetics

摘要：应用DSC考察了降冰片烯二羧酸盐对等规聚丙烯结晶和熔融行为的影响。结果表明,降冰片烯二羧酸盐的加入提高了聚丙烯的结晶温度和熔融温度。其中钠盐(BCHE11)和钙盐(BCHE20)成核效果较为显著,添加质量分数在0.2%时可使聚丙烯的结晶峰值温度提高10.8℃和9.4℃。应用Avrami方法对降冰片烯二羧酸盐成核的聚丙烯等温结晶动力学进行了研究,结果表明,成核聚丙烯半结晶时间都小于空白聚丙烯,尤其是BCHE11和BCHE20。成核聚丙烯的Avrami指数n都在3左右,这表明成核聚丙烯的结晶生长方式为异相成核的三维球晶生长方式。
Nucleation efficiency of bicyclo [ 2.2.1 ] hept-5-ene-2,3-dicarboxylate salts as the nucleators for isotactic polypropylene （iPP） was investigated with differential scanning calorimeter （DSC）. The results show that the crystallization peak temperature of iPP with 0.2 % sodium salt and calcium salt can be increased by 10.8 ℃ and 9.4 ℃, respectively. Furthermore, the isothermal crystallization kinetics was studied by Avrami method. The results show that crystallization half time （t1/2） is dramatically decreased, the crystallization rate constants Z （T） are greatly increased after the addition of the nucleating agents. The Avrami exponents of nucleated iPP were between 2.4-3.1, which shows the addition of nucleating agent does not change the crystallization growth mode of iPP under isothermal conditions.