SEBS熔融接枝MAH及SEBS-g-MAH的热性能  

A STUDY ON SEBS MELT GRAFTED BY MAH AND SEBS-g-MAH THERMAL BEHAVIOR

作　　者：叶强[1] 周涛[2] 徐建波[1] 张爱民[2] 

机构地区：[1]中国石化巴陵石油化工有限责任公司,湖南岳阳414014 [2]高分子材料工程国家重点实验室

出　　处：《高分子材料科学与工程》2005年第5期220-223,共4页Polymer Materials Science & Engineering

基　　金：国家高技术研究发展项目(863计划)(2003AA333020);国家重点基础研究发展规划项目(G1999064809);国家自然科学基金重点项目(20034006)

摘　　要：采用双螺杆挤出机进行了SEBS熔融接枝M AH的反应挤出,得到了一系列不同接枝率的SEBS-g-M AH产品。采用酸碱滴定法测定了SEBS-g-M AH的接枝率。通过FT-IR和13C-NM R确定了SEBS-g-M AH的生成及接枝反应中M AH的接枝形式。通过DSC、TG两种方法对SEBS-g-M AH进行了热性能分析。由DSC分析,发现接枝后SEBS的PS段的Tg稍有降低,而EB段的Tg几乎没有变化;TG测试发现SEBS-g-M AH的热稳定性能比SEBS要高。In this paper, fusion method was screw extruder and SEBS-g-MAH with different employed to prepare SEBS-g-MAH via double graft ratio was obtained. Acid-base titration was used to evaluate the graft ratio of SEBS-g-MAH. From the results of FT-IR and ^13C-NMR, it can be proved that MAH has grafted on SEBS molecular chains and the form of MAH grafting is unimolecule. DSC and TG were used to investigate thermal behavior of SEBS-g-MAH. Through DSC data, we find that, after grafting by MAH, Tg of SEBS PS block slightly decreases with graft ratio increasing, however, Tg of SEBS EB block maintains uniform with graft ratio increasing. From TG results, we also find that thermal stability of SEBS-g-MAH is better than SEBS.

关 键 词：SEBS SEBS—g—MAH 熔融接枝 示差扫描量热分析 热失重 

分 类 号：O631.22[理学—高分子化学]