甲基丙烯酸缩水甘油酯熔融接枝K树脂  

Melt grafting of K resin with GMA

作　　者：戚远慧 朱永军[1,2] 罗筑[1,2] 黄安荣[1,2] 韦良强[2] 

机构地区：[1]贵州大学材料与冶金学院,贵州省贵阳市550025 [2]国家复合改性聚合物材料工程技术研究中心,贵州省贵阳市550014

出　　处：《合成树脂及塑料》2015年第1期28-31,共4页China Synthetic Resin and Plastics

基　　金：贵州省科技支撑计划项目(工业攻关);黔科合GY字〔2012〕3036号

摘　　要：采用同向双螺杆挤出机熔融挤出制备甲基丙烯酸缩水甘油酯(GMA)接枝苯乙烯-丁二烯嵌段共聚物(简称K树脂)(K-g-GMA),用傅里叶变换红外光谱和酸碱滴定法对K-g-GMA进行表征并测定其接枝率,分析了GMA用量对K-g-GMA接枝率及熔体流动速率的影响。将K-g-GMA添加到K树脂与苯乙烯-丙烯腈共聚物(SAN)共混体系中,采用熔融共混法制备了K/SAN透明合金。结果表明:随着GMA用量的增加,K-g-GMA的接枝率逐渐升高,当GMA用量为4 phr时,接枝率最高,熔体流动性较好。当K树脂与SAN质量比为15∶85,w(K-g-GMA)为3%时,与未加K-g-GMA相比,透明合金的拉伸强度、悬臂梁无缺口冲击强度和透光率分别提高6.08%,25.72%,0.92%。The copolymer of glycidyl methacrylate（GMA） grafting styrene and butadiene block copolymer （referred to as K resin）（K-g-GMA） was prepared by melting extrusion with a co-rotating twin-screw extruder. The character and grafting ratio of K-g-GMA were studied by Fourier transform infrared spectroscopy （FTIR） and acid-base titration. The effects of GMA content on the grafting ratio and the melt flow rate of K-g-GMA were studied. The grafted copolymer was added to the blending system of K resin and styrene-acrylonitrile copolymer （SAN）,and the K/SAN transparent alloy was prepared by melt blending process. The results show that the grafting ratio of K-g-GMA is increased with the increase of GMA content. The grafted copolymer has the highest grafting ratio and therefore good fluidity of its melt when the content of GMA is 4 phr. When the mass ratio of K resin to SAN is 15∶85 and mass percentage of K-g-GMA is 3%,the tensile strength,Izod notched impact strength and transmittance of the transparent alloy are increased by 6.08%,25.72%,0.92%,respectively in comparison with those of the alloy without K-g-GMA.

关 键 词：苯乙烯-丁二烯嵌段共聚物 甲基丙烯酸缩水甘油酯 熔融接枝 接枝率 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]