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HU Guowen1; LIU Bi1; DU Jifu1; GAO Tao1; ZHAI Maolin2

doi:10.11889/j.1000-3436.2012.rrj.30.120204

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更新时间：2021-12-01

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- Journal of Radiation Research and Radiation Processing Vol. 30, Issue 2, Pages: 81-86(2012)
- 作者机构：
  
  1. 1（湖北科技学院核技术与化学生物学院）,咸宁,437100
  2. 2（北京大学化学与分子工程学院应用化学系）,北京,100871
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- DOI：10.11889/j.1000-3436.2012.rrj.30.120204
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HU Guowen1, LIU Bi1, DU Jifu1, et al. [J]. Journal of Radiation Research and Radiation Processing 30(2):81-86(2012)
DOI：

HU Guowen1, LIU Bi1, DU Jifu1, et al. [J]. Journal of Radiation Research and Radiation Processing 30(2):81-86(2012) DOI： 10.11889/j.1000-3436.2012.rrj.30.120204.

摘要

以三元乙丙橡胶（Ethylene propylene dine terpolymer rubber，EPDM）为基材，三羟甲基丙烷三甲基丙烯酸酯（Trimethylopropane trimethylacrylate，TMPTMA）为交联敏化剂，采用60Co对其进行辐射硫化。研究了不同吸收剂量、不同TMPTMA用量对EPDM的凝胶分数和力学性能的影响，并通过热空气老化测试和热重分析，研究了辐射硫化橡胶与化学硫化橡胶耐老化性和热稳定性。结果表明：随着TMPTMA用量的增加，EPDM的凝胶分数增加，适宜用量为EPDM质量的8%。吸收剂量在120 kGy以下时，拉伸强度、伸长率为100%时的弹性模量及邵氏A硬度随着剂量的增加而增加，而断裂伸长率减小，合适的吸收剂量为约80 kGy。热空气老化后，化学硫化橡胶的拉伸强度及断裂伸长率迅速下降，而辐射硫化橡胶的拉伸强度先增加后减小，断裂伸长率缓慢降低。热重分析结果显示，化学交联的EPDM在430℃－480℃发生热分解，辐射硫化交联的EPDM的热分解温度为480℃－530℃。这些结果表明辐射硫化橡胶比化学硫化橡胶的耐老化性能和热稳定性好。

Abstract

Using trimethylopropane trimethylacrylate (TMPTMA) as crosslinking sensitizer, ethylene propylene dine terpolymer rubber (EPDM) was vulcanized by 60Co irradiation method. It has been found that the gel fraction of EPDM increases with the TMPTMA dosage and the appropriate dosage is 8% in weight percentage to EPDM. Tensile strength increases with the absorbed dose until 120 kGy. And the adopted absorbed dose is about 80 kGy. At the same time, the properties of aging resistance and thermal stability of radiation vulcanizate are improved compared with chemical vulcanizate. TG results show that the thermal decomposition temperature of radiation vulcanizate (480℃-530℃) is higher than that of chemical vulcanizate (430℃-480℃). These experimental results indicate that the properties of aging resistance and thermal stability of radiation vulcanizate are better than those of chemical vulcanizate.Cited

关键词

三元乙丙橡胶辐射硫化力学性能耐老化性能

Keywords

Ethylene propylene dine terpolymer rubber (EPDM)Radiation vulcanizationMechanical propertyAging resistance

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CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China

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DOI：10.11889/j.1000-3436.2012.rrj.30.120204

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