多检测GPC/SEC技术在高分子表征中的应用—聚(α-甲基苯乙烯-异戊二烯)二嵌段共聚物的溶液性质  

Use of Multiple Detectors GPC/SEC in Polymer Characterization -The Solution Properties of Poly(α-methylstyrene)-Polyisoprene Diblock Copolymer

作　　者：郝磊[1] 张德震[1] 陈建定[1] 徐种德[1] 

机构地区：[1]华东理工大学材料科学与工程学院,上海200237

出　　处：《功能高分子学报》2001年第4期422-426,共5页Journal of Functional Polymers

摘　　要：采用体积排斥色谱法 (SEC) /示差折光指数 (RI) /直角激光光散射 (RALLS) /示差粘度 (DV )三检测联用技术 ,在THF为溶剂、2 5℃的条件下表征了聚 (α 甲基苯乙烯 异戊二烯 ) (PαMS PI)二嵌段共聚物 ;计算得到了PαMS PI分子的无扰尺寸A为 0 .0 778nm·mol1/ 2 ·g-1/ 2 ;根据PαMS PI与PS分子的无扰尺寸A ,比较了两者在 2 5℃、THF溶剂体系中的链柔性程度 ,证明在此体系中PαMS PI与PS的链柔性程度相当 ;验证了PαMSPoly(α methylstyrene) polyisoprene(PαMS PI) di block copolymers were characterized via SEC/RI/RALLS/DV in THF at 25?℃. The unperturbed dimensions of PαMS PI and PS were calculated by using one mathematical procedure for the extrapolation. Then the value of the unperturbed dimension of PαMS PI was obtained and that was 0.077?8?nm·mol 1/2 ·g 1/2 . It was demonstrated that the chain flexibility of PαMS PI and PS didn't differ much in THF at 25?℃ by comparing the unperturbed dimensions of the two.The universal calibration of PαMS PI was also confirmed.

关 键 词：多检测器体积排斥色谱法 聚(α-甲基苯乙烯-异戊二烯) 二嵌段共聚物 MHS方程 无扰尺寸 溶液 性质 

分 类 号：O631.1[理学—高分子化学] O631.4[理学—化学]