共聚聚酰亚胺纺丝溶液流变性能的研究  

Rheological behavior of co-polyimide spinning solution

作　　者：黄忠[1] 向红兵[1] 邓丽莉[1] 陈蕾[1,2,3] 于俊荣[1,2,3] 诸静[1,2,3] 胡祖明[1,2,3] 

机构地区：[1]东华大学材料科学与工程学院,上海201620 [2]东华大学纤维材料改性国家重点实验室,上海201620 [3]东华大学化学纤维研究所,上海201620

出　　处：《合成纤维工业》2011年第1期19-22,共4页China Synthetic Fiber Industry

摘　　要：研究了二苯酮四酸二酐-二异氰酸甲苯酯-二异氰酸二苯甲烷酯共聚聚酰亚胺(P84)的N-甲基吡咯烷酮(NMP)溶液的流变性能。结果表明:P84质量分数为17%～21%的NMP溶液为切力变稀流体,在温度为40～60℃时,其非牛顿指数为0.80～0.98,随着P84浓度增加或温度降低,其溶液的非牛顿性增加;在低剪切速率下,P84浓度增加使纺丝溶液的粘流活化能增加;随着P84浓度的增加或温度的降低,纺丝溶液的结构粘度指数、储能模量、损耗模量、复数粘度均增大。The rheological behavior of lic dianhydride-tolyene diisocyanate-diphenylmethane diisocyanate co-polyimide（P84） solution was studied using N-methyl pyrrolidone （NMP） as a solvent. The results showed that the NMP solution containing 17% -21% P84 by mass fraction was a shear-thinning fluid with the non-Newtonian index of 0.80 -0.98 from 40℃ to 60℃. The non-Newtonian behavior of the solution increased while increasing I）8d concentration and decreasing the temperature. The viscous flow activation energy of the spinning solution increased while increasing P84 concentration at low shearing rate. The structural viscosity index, storage modulus, loss modulus and complex viscosity of the spinning solution increased while increasing the P84 concentration and decreasing the temperature.

关 键 词：二苯酮四酸二酐-二异氰酸甲苯酯-二异氰酸二苯甲烷酯 共聚聚酰亚胺 N-甲基吡咯烷酮 纺丝 

分 类 号：TQ340.1[化学工程—化纤工业]