聚对苯二甲酸丁二醇酯共混改性聚丙烯的耐热性能研究  

Study on Heat Resistance of Polypropylene Blending Modified by Polybutylene Terephthalate

作　　者：方丽华[1] 李非凡 董茹欣 陈榛榛 孙子瑞 黄世俊 苏志忠[1,3] FANG Li-hua;LI Fei-fan;DONG Ru-xin;CHENG Zhen-zhen;SUN Zi-rui;HUANG Shi-jun;SU Zhi-zhong(College of Resource and Chemical Engineering,Sanming University,Sanming 365004,China;College of Chemical Engineering,Fuzhou University,Fuzhou 350116,China;Institute of Advanced Polymer Materials,Sanming University,Sanming 365004,China)

机构地区：[1]三明学院资源与化工学院,福建三明365004 [2]福州大学石油与化工学院,福建福州350116 [3]三明学院先进高分子材料研究所,福建三明365004

出　　处：《塑料科技》2024年第11期13-18,共6页Plastics Science and Technology

基　　金：福建省科技厅引导性项目(2023H0018);福建省区域发展项目(2021Y3003)。

摘　　要：为提升聚丙烯(PP)的耐热温度,拓宽PP材料的应用范围,选择马来酸酐接枝氢化苯乙烯-丁二烯嵌段共聚物(SEBS-g-MAH)作为聚对苯二甲酸丁二醇酯(PBT)与PP共混体系的相容剂,并与马来酸酐接枝聚丙烯共聚物(PP-g-MAH)的作用对比,制备PP/PBT共混物。差示扫描量热仪(DSC)、扫描电镜(SEM)分析和力学性能测试结果表明,SEBS-g-MAH有效提升了PP与PBT的相容性,制备的PP/PBT/SEBS-g-MAH(80/20/15)共混物与纯PP相比,热变形温度提升15℃,缺口冲击强度提升50%左右。SEBS-g-MAH与PBT的端羧基反应,改变了PBT的分子结构对称性,使PBT的结晶能力下降,同时在PP与PBT之间起到反应增容作用,提升了共混物的综合性能。In order to improve the heat resistance temperature of polypropylene(PP)and broaden the application range of PP material,maleic anhydride grafted hydrogenated styrene-butadiene block copolymer(SEBS-g-MAH)was selected as the compatibility agent of polybutylene terephthalate(PBT)and PP blending system,and the effect of compatibility agent of SEBS-g-MAH was compared with that of PP-g-MAH to prepare PP/PBT blends.Differential scanning calorimeter(DSC),scanning electron microscopy(SEM)analysis and mechanical properties test results showed that SEBS-g-MAH effectively improved the compatibility of PP and PBT.Compared with pure PP,the heat deflection temperature of the prepared PP/PBT/SEBS-g-MAH(80/20/15)blend was increased by 15℃,and the notch impact strength was increased by about 50%.The terminal carboxyl reaction of SEBS-g-MAH and PBT changed the molecular structure symmetry of PBT,reduced the crystallization ability of PBT,increased the reactive compatibilization between PP and PBT,and improved the comprehensive performance of the PP/PBT blend.

关 键 词：聚丙烯 聚对苯二甲酸丁二醇酯 耐热性能 共混改性 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]