高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (1): 140.

• 论文 • 上一篇    下一篇

经γ射线辐照的LLDPE与氢氧化铝体系冲击性能的研究

徐闻, 肖望东, 徐僖   

  1. 成都科技大学高分子研究所, 成都, 610065
  • 收稿日期:1996-01-08 出版日期:1997-01-24 发布日期:1997-01-24
  • 通讯作者: 徐闻, 女, 53岁, 副教授.
  • 作者简介:徐闻, 女, 53岁, 副教授.
  • 基金资助:

    国家自然科学基金

A Study on Impact Properties of γ-Ray Irradiated LLDPE Filled with Alumina Trihydrate

XU Wen, XIAO Wang-Dong, XU Xi   

  1. The State Key Lab.of Polymer Materials Engineering, Polymer Research Institute ofChengdu University of Science and Technology, Chengdu, 610065
  • Received:1996-01-08 Online:1997-01-24 Published:1997-01-24

摘要: 研究了γ射线剂量率对线性低密度聚乙烯(LLDPE)氧化与降解的影响和LLDPE/γ-LLDPE/ATH(氢氧化铝)体系的冲击性能.结果表明,剂量率越低,LLDPE氧化和降解的程度越高.γ-LLDPE的加入可明显改善LLDPE和ATH的相容性,提高LLDPE/ATH体系的冲击强度,改善ATH在LLDPE树脂相中的分散性.

关键词: &gamma, 辐照, 线型低密度聚乙烯, 线型低密度聚乙烯/氢氧化铝体系, 冲击性能

Abstract: Alumina trihydrate(ATH) can be used as a fire retardant of polyethylene which is incompatible with ATH.Functional groups(mainly carbonyl and hydroxyl groups) are intro-duced to LLDPEmolecular chains by γ-rays in air so as to improve the affinity between LLDPEand ATH.The effect of dose rate on oxidation and degradation of LLDPEexposed to γ-rays in air under the same integrated dose, and the impact properties of LLDPE/γ-LLDPE/ATHblend were studied in this paper.The experimental results show that the lower dose rate favors oxidation and degradation of LLDPE.γ-LLDPEcan distinctly increase the impact strength of LLDPE/ATHblend, and improve the dispersion of ATHin LLDPEmatrix.By adding 10% γ-LLDPE (0.1 kGy/h, 50 kGy) of the matrix to ATH (50% by weight) fi1led LLDPE, the impact strength of blend can increase from 65 J/m to 260 J/m.

Key words: &gamma, irradiation, Linear low density polyethylene (LLDPE), Linear low density polyethylene/alumina trihydrate blend, Impact property

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