J4 ›› 2009, Vol. 47 ›› Issue (05): 1054-1056.

• 材料科学 • 上一篇    下一篇

二次拉伸温度对PAN原丝中微孔洞形貌变化的影响

李延根1,2, 黄祖飞1, 王春忠1   

  1. 1. 吉林大学 材料科学与工程学院, 长春 130012|2. 长春大学 理学院, 长春 130022
  • 收稿日期:2008-11-20 出版日期:2009-09-26 发布日期:2009-11-03
  • 通讯作者: 王春忠 E-mail:wcz@jlu.edu.cn

Influence of Secondary Stretching Temperature on |Configuration Change of |Microvoids in Polyacylonitrile-based Precursor Fibres

LI Yan gen1,2, HUANG Zu fei1, WANG Chun zhong1   

  1. 1. College of Materials Science and Engineering, Jilin University, Changchun 130012, China;2. College of Science, Changchun University, Changchun |130022, China
  • Received:2008-11-20 Online:2009-09-26 Published:2009-11-03
  • Contact: WANG Chun zhong E-mail:wcz@jlu.edu.cn

摘要:

利用一维多取向X射线小角散射(SAXS)方法研究二次拉伸温度对聚丙烯腈碳纤维(PAN)原丝中微孔洞形貌的影响. 结果表明, 在一定温度(2T0)加热拉伸时, PAN原丝中微孔洞的相对体积分数(V/V0)较低温时有所增加, 但其取向角()最小, 长径比(L/2R)最大, 两者均有利于提高碳纤维的力学性能; 当拉伸温度过高时, 微孔洞形状的变化规律与之相反, 不利于提高碳纤维的力学性能.

关键词: PAN原丝, 一维多取向X射线小角散射, 微孔洞

Abstract:

The influence of stretching temperature on the configuration of the microvoids in PAN precursor fibres was investigated by multi\|orientated one\|dimensional small angle X\|ray scattering. The results show that  though the relative content of microvoids (V/V0) is  increased in some degree at the relative temperature 2T0,  the oriented angle () of microvoids would be the  minimal, and the ratio of the length with the diameter of microvoids (L/2R) would be the maximal. These are benefit to increasing the mechanics performance of fibers. But when the heating temperature is too high, the changes of micropores will be on the contrary.

Key words: PAN precursor fibre, multi-orientated one-dimensional SAXS, microvoid

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