STRUCTURAL INVESTIGATION OF POLY(VINYL ALCOHOL) FIBERS UNDER AXIAL COMPRESSIONAL DEFORMATION

XIAO Changfa; ZHANG Yufeng

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STRUCTURAL INVESTIGATION OF POLY(VINYL ALCOHOL) FIBERS UNDER AXIAL COMPRESSIONAL DEFORMATION

Research Article | 更新时间：2021-03-19

- STRUCTURAL INVESTIGATION OF POLY(VINYL ALCOHOL) FIBERS UNDER AXIAL COMPRESSIONAL DEFORMATION
- Acta Polymerica Sinica Issue 6, Pages: 791-794(2002)
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- Published：20 December 2002，
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XIAO Changfa, ZHANG Yufeng. STRUCTURAL INVESTIGATION OF POLY(VINYL ALCOHOL) FIBERS UNDER AXIAL COMPRESSIONAL DEFORMATION. [J]. Acta Polymerica Sinica (6):791-794(2002)
DOI：

XIAO Changfa, ZHANG Yufeng. STRUCTURAL INVESTIGATION OF POLY(VINYL ALCOHOL) FIBERS UNDER AXIAL COMPRESSIONAL DEFORMATION. [J]. Acta Polymerica Sinica (6):791-794(2002) DOI：

摘要

研究了具有不同分子链形态PVA纤维的轴向压缩变形结构 .结果表明

在具有带状结构的PVA纤维中

带状结构对纤维的轴向压缩变形行为有很大影响 .压缩变形后纤维中的带状结构仍然存在

但带状结构内的分子链与纤维轴发生倾斜

随压缩变形程度增大

在有利剪切应力发展的方向形成褶皱变形带

最后导致纤维中所有带状结构破坏 .X光衍射实验结果表明

对于具有带状结构的PVA纤维

(101)[010]晶面系的滑移对其压缩变形过程有重要影响.

Abstract

The influence of supermolecular structures on the axial compressional behavior of poly(vinyl alcohol) (PVA) fibers was investigated．Two kinds of PVA fibers with different the morphological structure of molecular chains

PVA-H fiber and PVA-B fiber were studied．PVA-H fiber with a long-period structure that is made up of stacked folded-chain crystals has a homogeneous appearance

while PVA-B fiber with extended-chain crystals has a characteristic banded structure．The axial deformation behavior of PVA-B fibers was quite different from that of PVA-H fibers．When the PVA-B fibers were axially compressed

the PVA molecules in the banded structure were considerably kinked in zigzag fashion from band to band to form deep “crease”．Finally

all banded structures in the fiber were destroyed．It is suggested that (101)[010] slip plays an important role in the deformation of the PVA-B fibers.

关键词

聚乙烯醇纤维轴向压缩变形结构

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