星型支化聚苯乙烯在四氢呋喃溶液中的形态和溶液性质  

Morphologies and Properties of Star Polystyrene in Tetrahydrofuran Solution

作　　者：朱梦冰[1] 孙凡[1] 董英伟[1] 俞强[1] 

机构地区：[1]常州大学材料科学与工程学院江苏省太阳能电池材料与技术重点实验室,江苏常州213164

出　　处：《高分子材料科学与工程》2013年第5期54-57,共4页Polymer Materials Science & Engineering

基　　金：江苏省太阳能电池材料与技术重点实验室资助项目

摘　　要：通过原子转移自由基聚合制备不同臂长的三臂和四臂星型支化聚苯乙烯(PS),采用示差折光指数(RI)/多角度光散射(MALLS)/毛细管黏度(DV)三检测器联用凝胶渗透色谱对不同臂结构星型PS在四氢呋喃中的形态和溶液性质进行了研究。结果表明,星型支化PS的线团尺寸及特性黏数均低于相同分子量的线型PS,臂数越多,线团紧密程度越大,旋转半径及特性黏数随分子量增加而增大的幅度越小。与线型PS相比,星型支化PS的Mark-Houwink-Sakurada(MHS)方程参数K、α表现出较强的分子量依赖性。3-arm and 4-arm star polystyrenes with different arm lengths were synthesized through atom transfer radical polymerization （ATRP）, and their solution morphologies and properties in tetrahydrofuran （THF） were investigated by multi-detection GPC with refractive index, multiangle light-scattering and viscosity detectors（R I/ MALLS/DV）. The results indicate that the radius of gyration （Rg） and intrinsic viscosity （[η） of star-shaped PS in THF are lower than those of linear PS with similar molecular weight. With increase of arm number, the molecular coils become more tight, and the slope：of curves of R g and [η] versus molecular weight decreases. Compared with linear PS, K and a parameters of Mark-Houwink-Sakurada（MHS） equation for the 3-arm and 4-arm star PS show strong dependence on molecular weight.

关 键 词：星型支化聚苯乙烯 溶液形态 MHS方程参数 

分 类 号：O631.4[理学—高分子化学]