磺化SIS及其离聚物的稀溶液性质  

Dilute Solution Properties of Sulfonated Styrene-Isoprene- Styrene Triblock Copolymer and Its Ionomers

作　　者：李谷[1] 麦堪成[1] 冯开才[1] 刘振兴[1] 

机构地区：[1]教育部聚合物复合材料及功能材料重点实验室

出　　处：《应用化学》2004年第5期518-520,共3页Chinese Journal of Applied Chemistry

基　　金：广东省自然科学基金 (0 2 173 1)重点项目

摘　　要：The relationship between the reduced viscosity and concentation of sulfonated styrene-isoprene- styrene triblock copolymer（SSIS） and its ionomers in toluene and toluene/methanol solutions were studied. The intrinsic viscosity \ was calculated. The results show that SSIS tends to form an intra-molecular chain interaction and form more enclosed molecular chain with a lower reduced viscosity and intrinsic viscosity when the sulfonation degree x（SO3H） decreased. A change of interaction from intra- to inter-molecular chain was observed, and the intrinsic viscosity improved from 0.641 dL/g to 0.656 dL/g by increasing the sulfonation degree from 3.95% to 7.36% due to the chain combination. This also make the size of molecular chain of SSIS larger than SIS . Although be a precipitant for SIS , a few amounts of methanol can change the solubility of SSIS in toluene by destroying the combination of molecular chain. Lanthanum ionomers showed a lower reduced viscosity as compared with sodium and zinc ionomers.The relationship between the reduced viscosity and concentation of sulfonated styrene-isoprene- styrene triblock copolymer(SSIS) and its ionomers in toluene and toluene/methanol solutions were studied. The intrinsic viscosity \ was calculated. The results show that SSIS tends to form an intra-molecular chain interaction and form more enclosed molecular chain with a lower reduced viscosity and intrinsic viscosity when the sulfonation degree x(SO_3H) decreased. A change of interaction from intra- to inter-molecular chain was observed, and the intrinsic viscosity improved from 0.641 dL/g to 0.656 dL/g by increasing the sulfonation degree from 3.95% to 7.36% due to the chain combination. This also make the size of molecular chain of SSIS larger than SIS . Although be a precipitant for SIS , a few amounts of methanol can change the solubility of SSIS in toluene by destroying the combination of molecular chain. Lanthanum ionomers showed a lower reduced viscosity as compared with sodium and zinc ionomers.

关 键 词：磺化(苯乙烯-异戊二烯-苯乙烯)嵌段共聚物 比浓粘度 特性粘数 溶液性质 

分 类 号：O631[理学—高分子化学]