摘要
超高分子量聚乙烯(UHMWPE)的初生凝胶电丝在超倍拉伸(简称为超拉伸)过程中其结构和性能要发生一系列变化。描述和表征这一过程可采用多种途径和多项指标。本文在用传统表征方法相比较的基础上提出了可用小角 X 射线散射(SAXS)强度来衡量纤维中的缺陷度,而缺陷度能很好地表征纤维在整个拉伸过程中力学性能的变化规律。本文的结论同时亦适用于其它高性能纤维品种,如 PVA 凝胶纤维等。
In this paper the formation mechanism of supermolecular structure of gel-spun
ultra-high molecular weight polyethylene(UHMWPE)fibers is discussed on bases of data
from scanning electron microscopy(SEM),wide angle X-ray diffraction(WAXD),small
angle X-ray scattering(SAXS)and transmission electron microscopy(TEM).It shows that
high drawn PE gel-fibers have the structure of shish-kcbabs gradually formed during draw-
ing process.This characteristic structure can be transformed to extented-chain crystal struc-
ture at very high drawing degree.And it is just the internal structure that contributes to the
high-performance of UHMWPE fibers
出处
《中国纺织大学学报》
CSCD
1992年第1期12-18,共7页
Journal of China Textile University
关键词
聚乙烯
凝胶纤维
gel
polyethylene
transmission electron microscopy(TEM)
structure parameter
ultra-drawing
shish-kebabs
gel-spinning
ultra-high molecular weight polyethylene(UHMWPE)gel-fibers
