高流动高抗冲高强PP/EPR共混物的设计与制备  

Design and Preparation of PP/EPR Blends with High Processing Flowability and Impact Resistance and Mechanical Strength

作　　者：乔泽爽 鞠翼龙 刘宣伯[2] 白红伟[1] 傅强[1] QIAO Zeshuang;JU Yilong;LIU Xuanbo;BAI Hongwei;FU Qiang(College of Polymer Science and Engineering,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China;Institute of Material Science,SINOPEC Beijing Research Institute of Chemical Industry,Beijing 100013,China)

机构地区：[1]四川大学高分子科学与工程学院,高分子材料工程国家重点实验室,四川成都610065 [2]中国石化北京化工研究院材料科学研究所,北京100013

出　　处：《塑料工业》2022年第8期45-50,62,共7页China Plastics Industry

基　　金：中国石油化工股份有限公司科技部项目(219004-1)。

摘　　要：针对橡胶增韧塑料存在熔体流动性与力学强度和韧性难以平衡这一重要问题,以聚丙烯/乙丙橡胶(PP/EPR)共混物为例,提出通过构筑分子量分布呈“双峰”特性的PP基体来同步实现高流动、高强度和高抗冲韧性的策略。结果表明,通过将高、低分子量的PP按不同质量比复配形成“双峰”基体可设计得到具有较高流动性的高强高韧共混物,并且扩大二者的分子量差异更有利于流动性和力学性能的平衡。进一步分析表明,基体的链缠结密度是影响共混物性能的关键因素。It was challenging to achieve balance between the melt flowability, mechanical strength and toughness in rubber toughened plastics.Herein, taking polypropylene/ethylene-propylene rubber(PP/EPR)blends as example, a simplified but effective strategy was proposed to simultaneously realize high melt flowability, mechanical strength, and impact toughness simultaneously by constructing PP matrix with a bimodal molecular weight distribution.The results show that the combination of high-and low-molecular-weight PP provides an opportunity for the design of high-strength and high-toughness blends with high melt flowability.Moreover, increasing the difference between the molecular weight of the two PP components is beneficial to obtain the balanced melt flowability and mechanical properties.Further analysis indicates that the chain entanglement density of the compounded PP matrix is the crucial factor affecting the properties of the blends.

关 键 词：聚丙烯 增韧 刚韧平衡 流动性 熔体质量流动速率 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]