接枝改性SBS对PS/SBS/CaC0_3复合材料形态和力学性能的影响  

Effect of Grafting Modification of SBS on Morphology and Mechanical Properties of PS/SBS/CaCO_3 Ternary Composites

作　　者：龚兴厚[1] 邱巧锐[1] 李纯清[1] 陈绪煌[1] 

机构地区：[1]湖北工业大学化学与环境工程学院,湖北武汉430068

出　　处：《塑料》2009年第6期94-96,93,共4页Plastics

基　　金：湖北工业大学博士启动基金项目(32700122)

摘　　要：采用马来酸酐(MAH)和苯乙烯(St)作为接枝单体,通过溶液聚合法合成接枝极性基团的苯乙烯-丁二烯-苯乙烯三嵌段共聚物(SBS),然后与聚苯乙烯(PS)基体、碳酸钙(CaCO_3)粒子复合,用傅立叶红外光谱仪表征接枝处理前后SBS表面化学结构的变化;并研究了SBS改性对复合材料微观结构和力学性能的影响。结果表明:双单体溶液聚合法成功地将极性基因接枝在SBS链上;填充SBS-g-MAH后,促进CaCO_3在PS基体中的分散、改善PS-CaCO_3粒子间界面粘接,起到良好的增容作用;SBS-g-MAH和CaCO_3粒子对PS基体具有协同增强增韧作用,同时能提高复合材料的拉伸强度和冲击强度。The styrene-butadiene-styrene triblock copolymer was modified by solution grafting copolymerization with maleic anhydride（MAH） and styrene（St）, then compounded with PS and CaCO3. The effect of grafting modification of SBS on morphology and mechanical properties of PS/SBS-g-MAH/CaCO3 ternary composites were investigated. The FT-IR spectra confirmed that the MAH molecules were grafted on the SBS segmented. The modification of SBS enhanced the compatibility between CaCO3 and PS,improved the dispersion of CaCO3 particles in PS matrix, and enhanced the interfacial adhesion between CaCO3 and matrix. Thereby,the tensile strength and notch impact strength of PS/SBS-g-MAH/CaCO3 ternary composites were improved at the same time.

关 键 词：苯乙烯-丁二烯-苯乙烯三嵌段共聚物 聚苯乙烯 碳酸钙 复合材料 增韧 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]