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

作　　者：赵松美 初庆凯 秦亚伟 刘会影[4] 于湲 刘伟丽[1] ZHAO Songmei;CHU Qingkai;QIN Yawei;LIU Huiying;YU Yuan;LIU Weili(Institute of New Materials and Advanced Manufacturing,Beijing Academy of Science and Technology,Beijing 100089,China;School of Chemistry and Chemical Engineering,Shanxi Datong University,Datong 037009,China;PetroChina Petrochemical Research Institute,Beijing 102206,China;School of Materials Design and Engineering,Beijing Institute of Fashion Technology,Beijing100029,China;Institute of Resources and Environment,Beijing Academy of Science and Technology,Beijing 100089,China)

机构地区：[1]北京市科学技术研究院新材料与先进制造研究所,北京100089 [2]山西大同大学化学与化工学院,山西大同037009 [3]中国石油石油化工研究院,北京102206 [4]北京服装学院材料设计与工程学院,北京100029 [5]北京市科学技术研究院资源环境研究所,北京100089

出　　处：《石油化工》2025年第3期333-340,共8页Petrochemical Technology

基　　金：国家自然科学基金青年科学基金项目(22103092);北京市科学技术研究院财政资助项目(24CB011-02)。

摘　　要：在等规聚丙烯(iPP)和乙丙橡胶(EPR)两步共聚反应中引入非共轭二烯等交联助剂,制备了支化/交联结构的聚丙烯(PP)多相共聚物iPP/EPR。采用Jeziorny法、Ozawa法和莫志深法等分析了iPP/EPR的非等温结晶动力学,并观察了聚合物的非等温结晶形貌。实验结果表明,支化/交联PP多相共聚物iPP/EPR中的橡胶相EPR含量可达50%(w)以上;随着EPR含量的增加,iPP/EPR的结晶焓和结晶温度明显降低,iPP/EPR中iPP球晶的结晶形态变得不完善;Jeziorny法和莫志深法更适合分析支化/交联PP多相共聚物的非等温结晶动力学。Crosslinking agents like non-conjugated diene were incorporated into the two-step copolymerization of isotactic polypropylene(iPP)and ethylene-propylene rubber(EPR)to prepare branching/crosslinking polypropylene(PP)multiphase copolymer iPP/EPR.The non-isothermal crystallization kinetics of iPP/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 iPP/EPR can reach 50%(w)or higher;with the increase of EPR content,the crystallization enthalpy and crystallization temperature of iPP/EPR decrease significantly,and the crystallization morphology of iPP 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 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]