应用化学 ›› 1997, Vol. 0 ›› Issue (4): 46-49.

• 研究论文 • 上一篇    下一篇

辐照聚乙烯单晶的退火研究

袁玉珍, 景遐斌, 姜炳政, 冯之榴   

  1. 中国科学院长春应用化学研究所高分子物理联合开放实验室, 长春 130022
  • 收稿日期:1996-12-25 修回日期:1997-05-14 出版日期:1997-08-10 发布日期:1997-08-10
  • 基金资助:
    国家科委国家基础性研究关键项目

Annealing Behaviour of Irradiated Polyethylene Single Crystals

Yuan Yuzhen, Jing Xiabin, Jiang Bingzheng, Feng Zhiliu   

  1. Polymer Physics Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
  • Received:1996-12-25 Revised:1997-05-14 Published:1997-08-10 Online:1997-08-10

摘要: 用红外光谱、DSC、SAXS和WAXD等方法考察了辐照5MGy后的聚乙烯单晶在退火前后的结构变化,对比未辐照样品在同样条件下的变化,提出在90℃以下和105℃聚乙烯有不同的退火机理,辐照引起的交联和晶区结构损伤,限制了退火对晶体结构的改善程度。

关键词: 聚乙烯, 氘代聚乙烯, 辐照, 红外光谱, 退火

Abstract: The annealing behaviour of irradiated polyethylene(PE) single crystals was studied with Mixed-Crystals IR spectroscopy, SAXS, WAXD and DSC. The results were: (1)There are both adjacent reentry folding and random stems in the PE single crystals, the former is predominant. (2)In the annealing below or at 90℃, reptation is the major molecular motion, and it leads to improvement of the crystal structure to limited extent; partial fusion and recrystalization are involved in the annealing at 105℃. (3)The crosslinking and damage in the crystal region caused by irradiation prevents the PE crystals from being improved.

Key words: polyethylene, deuterated polyethylene, irradiation, infrared, annealing