The application difference between end-chain vinyl silicone oil and straight-chain vinyl silicone oil is mainly reflected in the difference in reactivity and application scenarios caused by the molecular structure. The former is mostly used for high elasticity and high strength silicone rubber due to the high activity of vinyl at both ends; the latter is mostly used for liquid silicone rubber and modified materials with high fluidity requirements due to the strong stability of the straight-chain structure.The following is the specific analysis：


Molecular structure and reactivity
End-chain vinyl silicone oil: Its molecular structure is characterized by the presence of vinyl groups only at both ends of the silicone chain.This structure enables the end-chain vinyl silicone oil to undergo a rapid addition reaction with hydrogen-containing silicone oil under the action of a catalyst, and has a high reactivity.
Straight-chain vinyl silicone oil: Its molecular structure is straight-chain, with a vinyl at each end, and the molecular overhang is removed.This structure makes straight-chain vinyl silicone oil have better chemical stability and physical morphological stability while maintaining a certain reactivity.
Application area
End chain vinyl silicone oil：
Additive liquid silicone rubber: As the main raw material, it is used to prepare silicone rubber products with high elasticity, high strength and good weather resistance.
Silicone gel: As a key ingredient, it is used to prepare silicone gels with excellent insulation, light transmittance and elasticity.
Rubber compound modifier: Used to improve the processing properties and physical and mechanical properties of rubber compound.
Plastic additives and reinforcing materials: used to improve the heat resistance, aging resistance and mechanical strength of plastics.
Straight chain vinyl silicone oil：
High temperature vulcanized silicone rubber (HTV): As the basic raw material, it is used to enhance the strength and hardness of silicone rubber and improve its stability and durability in high temperature environments.
Liquid silicone rubber: As the main material of injection thermoforming silicone rubber, it is used to prepare silicone rubber products with good fluidity and elasticity.
Preparation of new materials: react with polyurethane, acrylic acid and other organic materials to prepare new materials with weather resistance, aging resistance, UV resistance, enhanced toughness and other properties, which are widely used in coatings, adhesives, sealing materials and other fields.