共混海岛法制备亚微米级PPS超细纤维及结构性能研究-中国材料进展

文章信息/Info

Title:: Preparation and structural performance of PPS/PP blend the island superfine fiber

Author(s):: Wan Yanxia; Zhu Zhiguo; Wang Rui; Dong Zhenfeng; Zhang Xiuqin; School of Material Science and Engineering，Beijing Institute of Fashion Technology，Beijing 100029

摘要:: 以聚苯硫醚(PPS)和聚丙烯(PP)为原料，采用熔融共混纺丝法制备PPS/PP共混海岛纤维，经二甲苯溶除剥离掉基体相PP可制得PPS超细纤维。研究了PPS/PP共混组成、牵伸比对纤维的相结构、线密度、结晶、力学性能的影响。结果表明：PPS/PP共混组成比从30/70增加至 60/40时，PPS超细纤维平均直径从228 nm 增至 408 nm；当PPS/PP共混组成比大于 60/40时，开始出现相转变现象；PP的加入提高了PPS的结晶能力，随着PPS/PP共混组成比增大，纤维线密度逐渐变大，共混纤维中PPS组分的结晶度变小，纤维力学性能降低；提高牵伸倍数，纤维线密度变小，断裂强度增强，共混纤维中PPS组分的结晶度升高，纺速在280～350 m/min之间时，共混纤维可在2.0～3.0倍下进行牵伸；共混纺丝制得的PPS超细纤维热稳定性有所下降，但并不影响PPS高温使用性能。

Abstract:: The polyphenylene sulfide/polypropylene (PPS/PP) sea-island blend fibers were prepared from PPS and PP by blended melt spinning process. PPS superfine fibers were prepared by removing off PP matrix phase from the blend fiber in presence of xylene.The effect of composition ratio,drawing ratio on the phase structure,linear density,crystallization and mechanical properties of the blend fibers were studied.The results showed that the average diameter of PPS superfine fiber rose to 408nm from 228nm when the composition ratio of PPS/PP increased to 60/40 from 30/70.The phase transition began to appear when the composition ratio of PPS/PP more than 60/40.PP improved the crystallization ability of PPS, the fiber linear density became larger, the crystallinity of PPS and the mechanical properties of fibers was decreased, with the PPS/PP blend composition ratio increased.The fiber linear density became small,the fracture strength of fiber reinforced,crystallinity of PPS increased,with the drawing ratio improved.The drawing ratio of PPS/PP blend fiber was 2.0 to 3.0 times when the spinning speed was between in 280 and 350 m/min.The thermal stability of PPS superfine fiber declined, but that did not affect the high temperature properties of PPS.