3，4′-ODA改性PPTA流变性能的研究  

Study on rheological behavior of PPTA modified with 3,4′-ODA

作　　者：曹煜彤[1] 潘婉莲[1] 胡祖明[1] 刘兆峰[1] 

机构地区：[1]东华大学材料科学与工程学院纤维材料国家改性重点实验室,上海201620

出　　处：《合成纤维工业》2008年第1期41-43,共3页China Synthetic Fiber Industry

摘　　要：采用对苯二胺、对苯二甲酰氯以及第三单体3,4′-二氨基二苯醚(3,4′-ODA)在极性有机溶剂体系中进行低温缩聚,得到了聚对苯二甲酰对苯二胺(PPTA)共聚体溶液。研究了PPTA共聚体溶液的流变性能。结果表明:3,4′-ODA改性PPTA的共聚体溶液是典型的切力变稀流体;随着聚合温度的升高,溶液的表观粘度下降,非牛顿指数增大;随着溶液浓度的升高,溶液的表观粘度升高,非牛顿指数下降;随着剪切速率的提高,溶液的粘流活化能下降。A copolymer solution of poly-p-phenylene diamine terephthalamide （PPTA） was prepared by low-temperature polycondensation from p-phenylenediamine, terephthalyl chloride and 3,4＇-diaminodiphenyl ether （3,4＇-ODA） in presence of polar organic solvent system. The rheological behavior of the PPTA copolymer solution was studied. The results showed that the copolymer solution of PPTA modified with 3,4＇-ODA was a typical shear thinning fluid, The apparent viscosity of the solution was decreased and the non-Newtonian index was increased while elevating the polymerization temperature. The apparent viscosity was increased and the non-Newtonian index was decreased while raising the solution concentration. The viscous activation energy was decreased while increasing the shearing rate.

关 键 词：聚对苯二甲酰对苯二胺 3 4'-二氨基二苯醚 改性 流变性能 

分 类 号：TQ342.72[化学工程—化纤工业]