聚合物长支链的表征  

Characterization for Long Chain Branching of Polymer

作　　者：梁晓坤[1,2] 袁霞[1,2] 魏江涛[1,2] 罗筑[1,2] 

机构地区：[1]贵州大学材料与冶金学院高分子材料与工程系,贵州贵阳550025 [2]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014

出　　处：《塑料》2015年第6期23-28,共6页Plastics

摘　　要：在聚合物中少量长支链(LCB)的引入就能显著地提高熔体强度,改善聚合物在拉伸流场中的加工性能,因此LCB的表征在基础研究和工业化应用中显得十分重要。GPC-MALLS和流变学被视为表征LCB最为敏感的方法,近年来受到普遍的关注。总结了利用GPC-MALLS和流变学表征聚合物长支链的机理和研究进展,最后展望了聚合物中长支链表征的发展前景。The melt strength and processing in extensional flows of polymer can be significantly improved by introducing low amounts of long chain branching （LCB）. Therefore, characterization of LCB is significant importance in both basic research and industrial aplieations, for which GPC-MALLS and rheological methods proved to be the most sensitive methods to detect very low amounts of LCB is widely used. Mechanism and recent development of studies on GPC-MALLS and theological characterization of LCB are reviewed. The future prospect of LCB characterization is foreseen at last.

关 键 词：长支链 凝胶渗透色谱 多角激光散射 流变学 支化度 

分 类 号：O657.7[理学—分析化学]