多检测凝胶渗透色谱技术在超支化聚氨酯表征中的应用  

Studies of Hyperbranched Polyurethane by Multi-Detector Gel Permeation Chromatography

作　　者：洪玲[1] 王新灵[1] 赵喜安[1] 唐小真[1] 

机构地区：[1]上海交通大学化学化工学院,上海200240

出　　处：《上海交通大学学报》2003年第5期629-631,649,共4页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目 (5 990 3 0 0 4)

摘　　要：采用凝胶渗透色谱 ( GPC) /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 2 5°C的四氢呋喃 ( THF)中对超支化聚氨酯及与其结构类似的线性聚氨酯进行了表征 .比较了超支化聚合物和线性聚合物 lg[η],lg Rg 与 lg Mr的关系 ,计算了超支化聚氨酯的结构因子 ε.结果表明 ,超支化聚合物具有较低的特性粘数 ( [η]) ,较小的旋转半径 ( Rg) ;Hyperbranched polyurethane(HPU) and its linear analog(LPU) were studied by triple detector gel permeation chromatography (GPC) with refractive index(RI), right angle laser light scattering (RALLS) and differential viscosity(DV) detectors. The relationships between intrinsic viscosity( [η] ),radius of gyration ( R g) and the molecular structure were investigated. It was shown that the hyperbranched polyurethane has lower [η] and R g than that of its linear analog when they have the same molecular weight. The structure parameter ε was also calculated.

关 键 词：超支化 聚氨酯 多检测凝胶渗透色谱 

分 类 号：TQ323.2[化学工程—合成树脂塑料工业]