文章摘要
Effect on Reinforcement Agents and Vulcanization Agents on Thermal-Oxidative Aging Resistance of Silicone Rubber Compounds
Received:March 09, 2023  Revised:March 09, 2023
DOI：10.12136/j.issn.1000-890X.2024.12.0903
Key Words: silicone rubber；reinforcing agent；vulcanization agent；thermal-oxidative aging resistance
Author NameAffiliationE-mail
YANG Dechao Qingdao University of Science and Technology 952097532@qq.com 
LI Chaoqin* Qingdao University of Science and Technology chaoqinli@sina.com 
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Abstract:
      The effects of reinforcement agents and vulcanization agents on the thermal-oxidative aging resistance of silicone rubber compounds were studied by using methyl vinyl silicone rubber as the matrix，fumed silica or precipitation silica as the reinforcment agent and vulcanization agent double 25 or platinum vulcanization agent as the vulcanization agent.The results showed that the reinforcement agent had a more significant effect on the thermal-oxidative aging resistance of silicone rubber compound.With the extension of aging time，the cross-linking density of fumed silica reinforced silicone rubber compound showed an increasing trend，the hardness increased，the tensile strength increased first and then decreased，and the tensile elongation at break decreased.The cross-linking density of precipitation silica reinforced silicone rubber compound first decreased and then increased，while the hardness，tensile strength and tensile elongation at break all showed a decreasing trend. Overall，the thermal-oxidative aging resistance of precipitation silica reinforced silicone rubber compound was slightly better. The performance of silicone rubber compound using different vulcanization agents before thermo-oxidative aging was equivalent. After thermo-oxidative aging，compared with the vulcanization agent double 25 vulcanized silicone rubber compound，the cross-linking density and hardness of the platinum vulcanization agents vulcanized silicone rubber compound were slightly smaller，the tensile elongation at break increased，and the thermal-oxidative aging resistance was slightly better.
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