EPDM-g-MS/MS共混物的热性能及流变性能  

Study on Thermal Properties and Rheological Properties of EPDM-g-MS/MS Blends

作　　者：付锦锋[1] 王炼石[1] 张安强[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《现代塑料加工应用》2007年第6期27-30,共4页Modern Plastics Processing and Applications

摘　　要：用溶液聚合法合成的EPDM(乙烯/丙烯/二烯共聚物)与MMA(甲基丙烯酸甲酯)及St(苯乙烯)接枝共聚物(EP-DM-g-MS)与MS(苯乙烯-甲基丙烯酸甲酯共聚物)树脂共混制备MES(EPDM-g-MS增韧MS),通过热重分析研究了MES的热稳定性,通过测试MES的表观粘度、非牛顿指数和粘流活化能等流变参数,分析其流变性能。结果表明,MES具有较好的耐热性能,且随EPDM-g-MS含量及MMA/St配比的增加而提高。MES的非牛顿指数小于1,符合假塑性流体流动规律。其表观粘度随剪切速率和温度升高而降低,随EPDM-g-MS含量增加而提高。MES的粘流活化能小于MS树脂的。EPDM-g-MS synthesized by solution grafting copolymerization was blended with MS resin to prepare MES. The thermal stability of MES were studied by using thermogravimetric analysis. The rheological properties of MES were analyzed by testing rheological parameter, such as the apparent viscosity, non-Newton index and the flow activation energy. The results show that MES has excellent thermal stability, and the thermal stability increases with the increase of EPDM content and MMA/St ratio. The non-Newton index of MES are less than 1, which confirms pseudoplastic flow characteristics. The apparent viscosity of MES decreases with the increase of shearing rate and temperature, but increase with the increase of EPDM content. The flow activation energy of MES is less than that of MS resin.

关 键 词：增韧剂 苯乙烯-甲基丙烯酸甲醇共聚物 热性能 流变性能 

分 类 号：TQ320.7[化学工程—合成树脂塑料工业]