【摘要】 本工作对两种第三单体(乙叉降冰片烯和双环戊二烯)EPDM与CIIR的并用胶料,以硫磺或硫磺-过氧化二异丙苯体系硫化得到的EPDM/CIIR硫化胶,进行了力学性能和热氧老化性能的研究。实验结果表明,两种门尼粘度相近、第三单体不同的 EPDM,对 EPDM/CIIR硫化胶的力学性能无明显影响,但将显著影响其热氧老化性能。EPDM的第三单体、分子量分布、丙烯含量等因素会直接影响并用胶料的硫化速度、交联度和热分解温度,进而影响 EPDM/CIIR硫化胶的使用寿命等热氧老化性能。更多还原

【Abstract】 The blends of EPDM’s containing different kinds of diene monomers and chlorinated isobutylene-isoprene rubber ( CIIR ) were vulcanized with S and S-DCP curing systems, respectively.The mechanical properties,thermal oxidative properties, curing speed, and crosslinking degree of EPDM/ CIIR vulcanizates were investigated. The service-life of EPDM/CIIR vulcanizates was established by means of compressed stress relaxation in hot air. The results show that the type of diene monomer used, molecular weight distribution, and propylene content in EPDM have remarkable effect on the curing speed of the blends, crosslinking degree, and thermal decomposition temperature as well as the service-life of the EPDM/CIIR vulcanizates.更多还原