| abstract |
The invention discloses a brominated polyisobutylene-p-methylstyrene-based rubber composition, a preparation method and a vulcanizate. The rubber composition is prepared from raw materials including brominated polyisobutylene-p-methylstyrene-based rubber, polyamide, antioxidant, zinc oxide, magnesium oxide, stearic acid, accelerator, end-capping agent and catalyst; first The end-capping agent, catalyst, antioxidant and polyamide are blended and capped, and then the brominated polyisobutylene-p-methylstyrene-based rubber is uniformly masticated and blended with it, and then a vulcanization system is added, and after uniform mixing, the The rubber composition is then placed in a twin-screw extruder for dynamic vulcanization to obtain a thermoplastic vulcanizate. The present invention adopts the method of pre-capping nylon, which shields the reaction between nylon end groups and rubber, improves the vulcanization degree of rubber and the interfacial compatibility between rubber and plastic phases, and the prepared thermoplastic vulcanizate has fine microscopic phase. state structure, excellent physical and mechanical properties and high temperature resistance and high gas barrier properties. |