氯化钙对间位聚芳砜酰胺/二甲基甲酰胺溶液的影响  

The Effect of CaCl_2 on the Solution Behavior of Poly(3,3'-diphenylsulfone isophthalamide)/Dimethylformamide

作　　者：余优霞[1] 陈晟辉 袁峥[1] 陆顺兴 王华平[1] 张玉梅[1] 

机构地区：[1]东华大学纤维材料改性国家重点实验室,上海201620 [2]上海特安纶纤维有限公司,上海201419

出　　处：《合成纤维》2013年第1期7-12,共6页Synthetic Fiber in China

基　　金：国家自然科学基金的资助"(利用同步辐射技术研究聚芳砜酰胺纤维沿纺程的相态结构变化";编号11079015)

摘　　要：通过黏度法和电导率研究了间位聚芳砜酰胺——聚间二苯砜间苯二甲酰胺(mi-PSA)在二甲基甲酰胺(DMF)/氯化钙(CaCl)2中的稀溶液行为。结果表明:mi-PSA的特性黏度强烈依赖于CaCl2质量浓度的变化,并随着CaCl2质量浓度的增大出现最大值。针对这一现象,采用黏度法研究了CaCl2在DMF中的存在形式,推测CaCl2以[(DMF)4Ca]2+Cl2-形式存在于DMF中,Cl-与mi-PSA中酰胺基团上的氢原子相互作用,导致mi-PSA在DMF/CaCl2中产生聚电解质效应。电导率随CaCl2质量浓度变化的结果同样说明了mi-PSA在DMF/CaCl2中存在着聚电解质效应。The dilute solution properties of poly （3,3＇-diphenylsulfone isophthalamide） （mi-PSA） in DMF/ CaC12 were studied by an Ubbeholde viscometer and a Conductivity meter. It is found that the variations of intrinsic viscosity [η] of mi-PSA depend on the CaC12 concentration and there is a maximum in [η] as a function of CaC12. Thus the interactions between CaCI2 and DMF were studied and it was deduced that CaC12 could be in form of [（DMF）4Ca]^2＋Cl^2- in DMF by an Ubbeholde viscometer. C1- will be associated with N-H groups of the macromolecule which result in the polyelectrolyte behavior of mi-PSA. The result of conductivity as a function of CaCI2 concentration also explains that mi-PSA behaves as polyelectrolyte in DMF/CaCI2.

关 键 词：聚芳砜酰胺 溶液特性 电解质效应 特性黏度 电导率 

分 类 号：O633.2[理学—高分子化学]