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
方丽华 1李非凡 2董茹欣 1陈榛榛 1孙子瑞 1黄世俊 3苏志忠3
作者信息
- 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. 三明学院资源与化工学院,福建 三明 365004;三明学院先进高分子材料研究所,福建 三明 365004
- 折叠
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.
Abstract
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Key words
Polypropylene/Polybutylene terephthalate/Heat resistance/Blending modification引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据