Through the study on the high-temperature resistant system,anti-sealing degradation system and catalyst system,a silicon sealant for polyimide curing and molding was prepared,and the sealing property of the silicone sealant was evaluated and verified.The prepared silicone sealant exhibited a temperature resistance of up to 380℃,and still retained a certain extent of elasticity after aging at 350℃ for 24h,demonstrating excellent high-temperature resistance and anti-sealing degradation properties.Moreover,the silicone sealant could ensure the sealing effect required by hot-press can molding process at a polyimide curing temperature of up to 380℃ and a pressure of 3MPa,which met the demands of the batch preparation of polyimide composites.
维普
万方数据