聚丙烯腈
水溶液
材料科学
硫氰酸钠
化学工程
共聚物
氧化物
衍射
聚合物
三元运算
单体
纺纱
复合材料
纤维
高分子化学
化学
无机化学
光学
有机化学
冶金
程序设计语言
物理
工程类
计算机科学
作者
Igor Makarov,Л. К. Голова,M. I. Vinogradov,И. С. Левин,S. E. Sorokin
出处
期刊:Fibre Chemistry
[Springer Nature]
日期:2019-03-15
卷期号:50 (6): 508-513
被引量:7
标识
DOI:10.1007/s10692-019-10020-9
摘要
Structural and morphological evolution of polyacrylonitrile (PAN) samples from starting powder of a ternary copolymer to fibers produced from concentrated solutions of PAN in N-methylmorpholine-N-oxide (NMMO) was studied using x-ray diffraction for the first time. X-ray exposures in transmission and reflection geometries allowed the structures of outer and inner parts of the PAN fibers to be differentiated. It was shown that a shell—core structure formed in the precipitation bath during fiber spinning. A comparison of x-ray diffraction patterns of fibers spun using the NMMO process and industrial samples spun from DMSO and aqueous sodium thiocyanate solutions did not reveal fundamental structural differences.
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