文献类型：期刊文献

中文题名：iPP/HDPE/EPDM三元共混体系的组分分布、相容性和结晶行为

英文题名：THE COMPONENT DISTRIBUTION, COMPATIBILITY AND CRYSTALLIZATION BEHAVIOR OF IPP/HDPE/EPDM TERNARY BLENDS

作者：汪道明[1];张志平[1];应圣康[1]

机构：[1]华东化工学院材料科学研究所

年份：1991

卷号：1

期号：4

起止页码：390

中文期刊名：高分子学报

外文期刊名：Acta Polymerica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心1992】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：三元共混体系;IPP;HDPE;EPDM;相容

外文关键词：Ternary blends, Component distribution, Compatibility, Crystallization behavior

摘要：用DSC、^(13)C-NMR、SEM和WAXD等方法研究了IPP/HDPE/EPDM三元共混体系的组分分布、相容性和结晶行为。实验结果表明,EPDM与PE组分的相容性优于与PP组分的相容性,多数EPDM分子链段能够分布在PE组分中;EPDM含量为15％时,共混物相容性最好,SEM照片呈现晶体微区的互连或网络状结构;随EPDM含量增加,总结晶度X_c减小,其中PE组分结晶度X_(cE)有较大幅度地降低,PP组分结晶度X_(cp)基本没有变化,这可以根据EPDM和PE、PP之间相容性的差异以及PE、PP两组分在冷却过程中不同的结晶行为来解释。
The component distribution, cpmpatibility and crystallization behavior of the polyolefin blends of isotactic polypropylene (IPP), high density polyethylene (HDPE) and ethylene-pro-pylene-diene terpolymer (EPDM) were investigated by means of differential scanning calori-metry (DSC), 13C-nuclear magnetic resonance (18C-NMR), scanning electron microscopy (SEM) and wide-angle X-ray diffraction (WAXD). EPDM with high ethylene content was more compatible with PE component than PP component in the blends and its molecular segments mostly distributed in PE component. The ternary blend containing 15% of EPDM had best compatibility, exhibiting a interconnecting structure of domains of crystals in the SEM micrograph. The overall crystallinity (Xc) decreased with increasing EPDM content, which was ascribed to the facts that the crystallinky of PE component (XCE) decreased significantly and that of PP component (XCP) was almost unchanged. The results were explained on the basis of the difference in compatibility of EPDM with PE and PP as well as the different crystallization behavior of semicrystalline components in the course of cooling.