PS/PU硬核软壳核壳聚合物增韧改性聚苯乙烯  

PS Toughening modification by PS/PU soft shell-hard core polymer

作　　者：王福瑶 李德重 龚德朋 刘卓航 李杨 孙义明[1,2] Wang Fuyao;Li Dezhong;Gong Depeng;Liu Zhuohang;Li Yang;Sun Yiming(School of Materials and Chemical Engineering,Hubei University of Technology,Wuhan 430068,China;Hubei Provincial Key Laboratory of Green Materials for Light Industry,Hubei University of Technology,Wuhan 430068,China)

机构地区：[1]湖北工业大学材料与化学工程学院,湖北省武汉市430068 [2]湖北工业大学绿色轻工材料湖北省重点实验室,湖北省武汉市430068

出　　处：《合成树脂及塑料》2018年第4期5-9,共5页China Synthetic Resin and Plastics

摘　　要：采用丙酮法合成了水性聚氨酯(PU),以核壳种子乳液聚合法合成了核壳质量比为1:1的聚苯乙烯(PS)/PU硬核软壳核壳聚合物。对核壳聚合物进行傅里叶变换红外光谱测试、动态热机械分析,并以核壳聚合物质量分数为变量设计了一系列质量分数梯度,对PS进行了增韧改性研究。结果表明:预期设计的核壳结构粒子形成;加入相容剂后形成了部分相容体系,PS/PU核壳结构增韧改性剂质量分数在20%以上时,共混体系熔体在受应力状态时更多表现为弹性形变,且随核壳结构增韧改性剂质量分数增加而上升。PS/PU核壳结构增韧改性剂质量分数为20%时,共混体系的冲击强度为纯PS的261.23%,达到最佳。Waterborne polyurethane(PU)was synthesized by acetone method.Polystyrene/polyurethane(PS/PU)hard core-soft shell polymer with core-shell mass ratio of 1∶1 was synthesized by core-shell seed emulsion polymerization.The core-shell polymer was tested by Fourier transform infrared spectroscope and dynamic thermo-mechanical analysis.A series of mass fraction gradients were designed based on the mass fraction of the core-shell polymer.The toughening modification of PS was investigated.The results show that the particles in core-shell structure are formed as expected.A partially compatible system is formed by adding compatibilizer.The melt system performs more elastic deformation under stress when the mass fraction of PS/PU core-shell structure modifier is more than 20%,and it enhances with the increase of the mass fraction of core shell structure modifier.The impact strength of the blended system reaches the optimum of 261.23%of that of pure PS when the mass fraction of PS/PU core-shell structure toughening modifier is 20%.

关 键 词：聚苯乙烯 核壳结构 硬核软壳 增韧改性 

分 类 号：TQ322.2[化学工程—合成树脂塑料工业]