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.
作者
戚远慧
朱永军
罗筑
黄安荣
韦良强
Qi Yuanhui;Zhu Yongjun;Luo Zhu;Huang Anrong;Wei Liangqiang(College of Materials and Metallurgy,Guizhou University,Guiyang 550025,China;National Engineering Research Center for Compounding and Modification of Polymer Materials,Guiyang 550014,China)
出处
《合成树脂及塑料》
CAS
北大核心
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
