A RESEARCH ON SOME FACTORS AFFECTING RADIATION SENSIBILIZED CROSS-LINKING

Huang Guanglin; Chen Zefang; Li Yunhui; Zhong Yaoqiong; Xiong Wenshu; Zhou Wei

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A RESEARCH ON SOME FACTORS AFFECTING RADIATION SENSIBILIZED CROSS-LINKING

更新时间：2023-04-23

- A RESEARCH ON SOME FACTORS AFFECTING RADIATION SENSIBILIZED CROSS-LINKING
- Journal of Radiation Research and Radiation Processing Vol. 7, Issue 4, Pages: 1-7(1989)
- 作者机构：
  
  1.四川大学化学系，成都
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Huang Guanglin, Chen Zefang, Li Yunhui, et al. A RESEARCH ON SOME FACTORS AFFECTING RADIATION SENSIBILIZED CROSS-LINKING. [J]. Journal of Radiation Research and Radiation Processing 7(4):1-7(1989)
DOI：

Huang Guanglin, Chen Zefang, Li Yunhui, et al. A RESEARCH ON SOME FACTORS AFFECTING RADIATION SENSIBILIZED CROSS-LINKING. [J]. Journal of Radiation Research and Radiation Processing 7(4):1-7(1989) DOI：

摘要

本文研究多官能团单体对聚烯烃辐射交联增感的某些影响因素。首先研究了原料中不饱和结构的特征和数量对辐射增感交联的影响，结果表明，聚乙烯中亚乙烯基（RR'=CH,2,）双键有加速交联的作用，对此种双键含量较高的聚乙烯，多官能团单体增感辐射交联的作用很小。其次探讨了抗氧剂对辐射交联的影响，选用阻位酚类（1010和3114）和小分子酚类（PG）抗氧剂进行实验，结果发现1010和3114在抗氧化降解的同时，阻滞聚乙烯的辐射交联反应，推迟凝胶化。而PG则相反，既有抗氧化降解的作用，又能促进聚乙烯的辐射交联。质谱分析给出，PG的辐解中间体为活泼自由基OH，它可以引发链自由基的产生，从而起到促进交联的作用。当加入多官能团单体时，观察到对含阻位酚类抗氧剂的聚乙烯有增感作用，而对含PG的聚乙烯则基本上不起作用，其原因可能与二者对链分子竞争反应有关。

Abstract

The influence of unsaturation of various polyethylene on the radiation cross-linking, with and without polyfunctional monomers, was investigated. The results showed, that the suspended double-bonds of vinylidene has higher contribution to the radiation cross-linking. The polyethylene contained a bit more double-bonds possessed auto-sensibilized cross-linking action. The sensibilizing agent added outside posses has very small influence on the acceleration of radiation cross-linking.,The effects of three autioxidants (1010, 3114 and PG) on the radiation cross-linking efficiency of LDPE were studied. Experimental results showed, both 1010 and 3114 decreased the amount of crosslinking at a given dose, contrarily, the PG increased it. PG decomposed by radiation and produced OH radical which could accelerate the radiation cross-linking.,When the polyfunctional monomer was added to the system, the radiation cross-linking of LDPE containing 1010 was accelerated. However, for sample cotaining PG the sensibilizer exhibited very small influence on the radiation cross-linking.

关键词

聚乙烯辐射交联增感剂（敏化剂）不饱和结构抗氧剂

Keywords

PolythyleneRadiation cross-linkingSensibilizerUnsaturationAntioxidant

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