Study on the Possibility of One-Step Method Processing for Poly(p-Phenylene Terephthalamide) Fiber

Abstract

In this paper, the low molecular weight poly (p-phenylene terephthalamide) (LMW-PPTA) solutions with different end group were obtained through changing molar ratio of monomers. Then, the high molecular weight PPTA (HMW-PPTA) polymer was synthesis by Secondary copolymerization. At that time, the PPTA fiber may be produced by means of reaction spinning in one step. Hence, the possibility of one-step method processing for PPTA fiber was studied by investigating the polymerization degree and gelling time of secondary copolymerization under different situations. The one-step method processing for PPTA fiber is not only free from the dependence on concentrated sulfuric acid, but also able to be controllable easily. Remarkably, the facile procedure, lower cost and better environmental protection are significant for the manufacture of PPTA fiber.