PPAE和改性PPTA的合成及性能表征

The Synthesis and Characterization of PPAE and Modified PPTA

本文通过对苯二甲酰氯(TPC)和4,4′—二氨基二苯醚(DAE)在 N—甲基吡咯烷酮(NMP)—6%CaCl_2溶液体系中低温溶液缩聚合成了聚对苯二甲酰对二氨基二苯醚酰胺(PPAE),聚合物的对数比浓粘度(η_(inh))达到2.22.通过 DAE,对苯二胺(PPD)和 TPC 三元共缩聚制得改性聚对苯二甲酰对苯二胺(PPTA),并考察了 DAE 用量、叔胺添加剂等对聚合体η_(inh)及溶解性能的影响,对制得的二种类型的聚合体进行了IR、TG 电镜扫描等分析表征.

Poly(p-diphenyl ether terephalamide)(PPAE)and Copolymer of 4,4′-diphenyl ether p-pheny- lene terephthalamide(modified PPTA)are synthesized by the low-temperature polymerization of p- phenylenediamine,4,4′-diaminodiphenyl ether(DAE)and terephthaloyl chloride in N-Methyl-2- Pyrrolidone(NMP)6% calcium chloride is used as the alkali salt.The inherent viscosity(η_(inh))of PPAE is 2.2 and the η_(inh) of modified PPTA decreases with increasing of the mole content of DAE.But the solubility of modified PPTA is increased.They can be dissolved in NMP-CaCl_26% when the mole frac- tion of DAE is more than 15 percent.Some properties of these polymers are tested by IR,TG,TEM.