Thermal stability of CeO2/graphene/phenyl silicone rubber composites

Publication date: Available online 22 February 2019Source: Polymer TestingAuthor(s): Ruijie Han, Zhilong Wang, Yinghe Zhang, Kangmin NiuAbstractThermal 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 Td (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 CeO2 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°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).

Source: Polymer Testing - February 23, 2019 Category: Chemistry Source Type: research