Silicone rubber has excellent high and low temperature resistance, aging resistance, excellent dielectric properties, physiological inertia and other characteristics. It has become one of the indispensable high elastic materials in modern science and technology. The main disadvantage of silicone rubber is its strength, especially its low tear strength, which limits its application. Therefore, it is necessary to improve the strength and tear resistance of silicone rubber.
High tear resistant silicone rubber, high reinforcing silica, surface treated silica and some special compounding agents are added to the silicone rubber; Silicone rubber is used together with other organic polymers to improve tear resistance; A new type of silicone rubber with high tear resistance was synthesized by changing the molecular link structure of silicone rubber.
Silicone rubber compound for general use is mainly composed of raw rubber, reinforcing filler - commonly used silica, structural control agent to prevent the interaction between silica and raw rubber, and heat-resistant additive - peroxide commonly used iron trioxide as crosslinking agent. The results show that the strength and tear resistance of vulcanizate can be improved by using meteorological silica with high dispersion.