Investigation of the Effects of Peroxide Type and Coagent on the Curing and Mechanical Properties of Fluoro Vinyl Methyl Silicone

This study aims to investigate the effects of different peroxides and the triallyl isocyanurate (TAIC) as coagent on the curing, mechanical, and damping properties of fluoro vinyl methyl silicon rubber (FVMQ) elastomers. Rheological analysis reveals that dicumyl peroxide (DCP) provides faster curing rates, with a 50% higher Curing Rate Index (CRI) and 36% greater delta torque than 2,5‐dimethyl‐2,5‐di(tertiary‐butyl peroxy) hexane (DBPH), indicating improved crosslink density. Mechanical testing confirms superior tensile strength and stiffness in DCP‐cured elastomers but at the expense of reduced elongation at break. TAIC further enhances crosslink density, increasing the elastic modulus by 50% and improving shock absorption properties. However, DBPH‐cured systems exhibit superior damping behavior, characterized by higher relative hysteresis loss (tan δ ), making them suitable for vibration‐absorption applications. Di(2,4‐dichlorobenzoyl)peroxide (DCLBP) systems failed to cure adequately, likely due to catalyst poisoning. These findings highlight the critical role of peroxide type and coagent in determining the properties of FVMQ elastomers for specific industrial applications, balancing stiffness, flexibility, and damping performance.