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以对苯二胺和对苯二甲酰氯为单体,三正丁胺为酸性气体吸收剂,在N-甲基吡咯烷酮和N,N-二甲基乙酰胺的氯化钙的混合溶液体系中,采用低温溶液缩聚法制备了聚对苯二甲酰对苯二胺聚合物。研究了TPC过量值、单体PPD摩尔浓度、溶剂配比、CaCl2用量、TBA用量等因素对聚合物性能的影响。结果表明:当TPC过量值为8‰～9‰、PPD摩尔浓度为0.4 mol/L、溶剂配比为3∶1、CaCl2用量为6%、TBA投加量为PPD摩尔数的2倍时,可以获得性能较佳的PPTA聚合物。与现有的专利技术相比,该合成工艺的混合溶剂体系及酸吸收剂具有新颖性。
Using p-phenylenediamine and terephthaloyl chloride as monomers, tri-n-butylamine as an acid gas absorbent, in a mixed solution system of N-methylpyrrolidone and N, N-dimethylacetamide in calcium chloride , Poly (p-phenylene terephthalamide) polymer was prepared by polycondensation at low temperature. The effects of excess TPC, molar concentration of PPD, solvent ratio, CaCl2 dosage and TBA dosage on the properties of the polymer were studied. The results showed that when the TPC excess was 8 ‰ ~ 9 ‰, the molar concentration of PPD was 0.4 mol / L, the solvent ratio was 3:1, the dosage of CaCl2 was 6% and the dosage of TBA was twice as many as PPD. Can get better performance PPTA polymer. Compared with the existing patented technology, the mixed solvent system and the acid absorbent of the synthetic process are novel.