Structure change of CR-39 after neutron irradiation

Zhang Guangli Wang Tan

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Structure change of CR-39 after neutron irradiation

更新时间：2021-04-20

- Structure change of CR-39 after neutron irradiation
- NUCLEAR TECHNIQUES Issue 7, (1991)
- 作者机构：
  
  1. 北京大学
  2. 卫生部工业卫生实验所
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：01 July 1991
- 稿件说明：
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[1]张广利,王琰,冯玉水,赵秋芬.CR-39塑料在中子辐照前后结构变化的研究[J].核技术,1991(07):397-399.

Zhang Guangli Wang Tan. Structure change of CR-39 after neutron irradiation[J]. Nuclear techniques, 1991, (7): 397-399.
[1]张广利,王琰,冯玉水,赵秋芬.CR-39塑料在中子辐照前后结构变化的研究[J].核技术,1991(07):397-399. DOI：

Zhang Guangli Wang Tan. Structure change of CR-39 after neutron irradiation[J]. Nuclear techniques, 1991, (7): 397-399. DOI：

摘要

本文通过化学方法对经中子辐照处理前后的CR-39塑料中残存碳-碳双键含量进行测定

并用GPC法测定了碱性水解后水解产物聚烯丙醇链的分子量及其分布。辐照前后的碳-碳双键的百分含量分别为0.83％和0.66％

水解产物聚烯丙醇链辐照前的=1.87×10

=7.39×10

;辐照后的=1.79×10

=12.2×10

。实验结果表明辐照可以引发CR-39中的碳-碳双键;辐射交联反应主要发生在烯丙基链

辐射裂解反应主要发生在酯键。

Abstract

Determined were the percentage of C=C double bond in CR-39

the molecular weight and the distribution of polyallyl chains obtained by hydrolysis of the plastic. C=C（%） is 0.83% and 0.66% before and after irradiation

respectively. Mn= l.87×103 and 1.79×103 while Ma

=7.39×103 and 12.2×103 before and after irradiation respectively. The hydrolysis of CR-39 after irradiation is by far faster than before irradiation. These experimental results indicate that irradiation can initiate C=C double bond in CR-39

the racia-tion crosslinking occurs mainly on polyallyl chains and the radiation degradation mainly on diethyleneglycol dicarborate links.

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