• 文献标题:   Thermal stability of CeO2/graphene/phenyl silicone rubber composites
  • 文献类型:   Article
  • 作  者:   HAN RJ, WANG ZL, ZHANG YH, NIU KM
  • 作者关键词:   silicone rubber composite, mean activation energy, oxidation crosslinking, mechanical analysi, ceo2/graphene modification
  • 出版物名称:   POLYMER TESTING
  • ISSN:   0142-9418 EI 1873-2348
  • 通讯作者地址:   Univ Sci Technol Beijing
  • 被引频次:   10
  • DOI:   10.1016/j.polymertesting.2019.02.027
  • 出版年:   2019

▎ 摘  要

Thermal stability mechanism of CeO2/graphene/phenyl silicone rubber composites (PMVQ) are investigated by means of SEM, TGA, swelling and mechanical testing. First, the degradation mean activation energy E of rubber composites with T-d (the temperature of 50% weight loss, TGA) are used to analyze the action mechanism of CeO2 and graphene in thermal oxidative aging process. The results rev eal that Ce0 2 and graphene have joint effects on improving thermal stability of phenyl silicone rubber composites. Second, swelling test indicates that aging of rubber composites is dominated by oxidation crosslinking at 300 degrees Cfor 48 h. Finally, mechanical analysis shows tensile strength of PMVQ-3 (PMVQ containing graphene: 0.8phr and CeO2: 2phr) can reach 4.67 MPa increasing by 82.4% compared with PMVQ-1 (PMVQ without graphene and CeO2) after aging, and elongation at break of PMVQ-3 can remain at 180%, and even at 213% in PMVQ-4 (PMVQ containing graphene: 1.5phr and CeO2: 2phr).