摘要
采用普通湿法成形用的分子量 PVA 聚合体((?)_W=7.5×10~4)及稍高分子量的 PVA 聚合体((?)_W=10.1×10~4)进行了冻胶纺丝、拉伸及纤维结构性能的一系列研究。本报主要讨论冻胶纺丝工艺、初生纤维结构及其与拉伸性能间的关系。研究表明,纺丝原液浓度及喷丝头拉伸与纤维的可拉伸性密切有关。冻胶初生纤维的形态结构和聚集态结构与湿法成形的纤维明显不同.冻胶初生纤维的结构特点决定了它能承受高倍拉抻,从而显著提高纤维的力学性能。经初步探索制得了强度为11.6cN/dtex,模量为151cN/dtex 的 PVA 纤维。
Using two kinds of PVA polymers,one with ordinary molecular weight((?)_w=7.5 ×10~4)for wet-spinning,the other with a little higher molecular weight(_w=10.1×10~4),a series of studies on gel-spinning,drawing of them as well as fiber structureand properties were undergone.This work mainly deals with the relationshipsbetween the gel-spinning technology,as-spun fiber structure and its drawability.The results show that the fiber's drawability is closely related to the concentrationof spinning dope and the draw-down.The gel as-spun fiber is quite different inmorphological structure and polymeric structure from the wet-formed fiber.Gelfibers can be drawn to much higher ratio due to its structure characteristics.Hencethe mechanical properties of obtained fibers are improved remarkably.On the basisof the above investigations,the PVA fibers with tenacity of 11,57cN/dtex andmodulus of about 170cN/dtex have been prepared.
出处
《合成纤维工业》
CAS
CSCD
1990年第3期38-42,共5页
China Synthetic Fiber Industry
