石油化工2025，Vol.54Issue(3)：333-340,8.DOI:10.3969/j.issn.1000-8144.2025.03.006
支化/交联聚丙烯多相共聚物的非等温结晶行为
Non-isothermal crystallization of branching/crosslinking polypropylene multiphase copolymer
摘要
Abstract
Crosslinking agents like non-conjugated diene were incorporated into the two-step copolymerization of isotactic polypropylene(i PP)and ethylene-propylene rubber(EPR)to prepare branching/crosslinking polypropylene(PP)multiphase copolymer i PP/EPR.The non-isothermal crystallization kinetics of i PP/EPR were analyzed using methods of Jeziorny,Ozawa,and Mo Zhishen,and the non-isothermal crystallization morphology of the polymers was observed.Experimental results show that the rubber phase of EPR content in the branching/crosslinking PP multiphase copolymer i PP/EPR can reach 50%(w)or higher;with the increase of EPR content,the crystallization enthalpy and crystallization temperature of i PP/EPR decrease significantly,and the crystallization morphology of i PP spherulites become imperfect;Jeziorny and Mo Zhishen methods are much more suitable for analyzing the non-isothermal crystallization kinetics of branching/crosslinking PP multiphase copolymers.关键词
支化/交联聚丙烯多相共聚物/非等温结晶/结晶动力学/结晶形貌Key words
branching/crosslinking polypropylene multiphase copolymer/non-isothermal crystallization/crystallization kinetics/crystallization morphology分类
化学化工引用本文复制引用
赵松美,初庆凯,秦亚伟,刘会影,于湲,刘伟丽..支化/交联聚丙烯多相共聚物的非等温结晶行为[J].石油化工,2025,54(3):333-340,8.基金项目
国家自然科学基金青年科学基金项目(22103092) （22103092）
北京市科学技术研究院财政资助项目(24CB011-02). （24CB011-02）
