中华医学超声杂志

应用化学 ›› 1996, Vol. 0 ›› Issue (4): 68-70.

• 研究简报 • 上一篇    下一篇

聚乙烯片晶辐照破坏的X射线散射研究

王国英, 姜炳政   

  1. 中国科学院长春应用化学研究所 长春 130022
  • 收稿日期:1995-08-30 修回日期:1996-01-25 出版日期:1996-08-10 发布日期:1996-08-10
  • 基金资助:
    国家自然科学基金

X-ray Scattering Studies of Crystalline Lamellar Damage in Irradiated Polyethylene

Wang Guoying, Jiang Bingzheng   

  1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
  • Received:1995-08-30 Revised:1996-01-25 Published:1996-08-10 Online:1996-08-10

PDF

351

被引次数

3 | 1

摘要： 有关聚乙烯辐照破坏和交联问题,Hoseman等从X射线衍射的研究指出,辐照交联和破坏在晶区内部发生;Keller等从辐照聚乙烯经硝酸或臭氧腐蚀后,试洋的G PC研究和聚乙烯在电子显微镜的电子束辐照的跟踪考察提出,片晶自表面的折叠处交联、破坏,逐渐向片晶内部延伸的机理,称之为“片晶表面破坏机理”;我们由广角X射线衍射(WAXD)所得的品胞参数随辐照剂量变化关系的研究,提出了交联和破坏以内部破坏为主的看法,称之为“片晶内部破坏机理.本文通过对广角X射线衍射的分峰拟合和小角X射线散射(SAXS)偏大角部分的尾部曲线的分析,进一步探讨了辐照聚乙烯“片晶内部破坏机理”的可靠性.

关键词: 辐照聚乙烯, 广角X射线衍射, 小角X射线散射

Abstract: The tails of small angle X-ray scattering curves of polyethylene irradiated with different dos age have been analysed and found to agree with Porod's linearity relations of two-phase model. After irradiation the two-phase demarcation of polyethylene remains unchanged. The correlation length estimated from integral invariant and the intercept of a straight line does not change with dose remarkably. These results agree with the prediction of "lamellar core damage mechanism" and do not coincide with the prediction of "lamellar surface damage mechanism".

Key words: irradiated polyethylene, WAXD, SAXS

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