### Effect of radiation vulcanization on the mechanical properties of ethylene propylene dine terpolymer rubber

HU Guowen1  LIU Bi1  DU Jifu1  GAO Tao1  ZHAI Maolin2

1. 1 (College of Nuclea Technology, Chemistry and Biology , Hubei University of Science and
Technology, Xianning 437100, China)
2 (Department of Applied Chemistry, College of Chemistry and Molecular Engineering,
Peking University, Beijing 100871, China)
• Received:2011-06-21 Revised:2011-07-18 Online:2012-04-20 Published:2014-09-25

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.

CLC Number:

• TQ333.4，O644.2