Dihydroxydiphenylsilane plays a key role in improving the elasticity of silicone rubber by serving as a cross-linking agent for silicone rubber. Here are a few aspects of how it works and how to achieve increased elasticity:

Cross-linking: Dihydroxydiphenylsilane contains two hydroxyl groups (OH), which react with silicon-hydrogen bonds (Si-H) in silicone rubber molecules to form cross-links of silicon-oxygen bonds (Si-O-Si) structure. This cross-linking increases the number of connection points between silicone rubber molecules, allowing them to form a tighter network structure.

Three-dimensional network structure: Cross-linking causes cross-connections between silicone rubber molecules, forming a three-dimensional network structure. This structure makes it more difficult for silicone rubber to deform when stressed, improving its elasticity. The molecules of silicone rubber are able to return to their original shape more freely, thereby improving overall elasticity.

Inhibits molecular mobility: Cross-linking slows down the mobility of silicone rubber molecules. When silicone rubber is subjected to external pressure or deformation, the cross-linked structure prevents large-scale movement of molecules, making it easier to return to its original shape. This helps the silicone rubber quickly return to its original state after the stress disappears.

Improved wear resistance: Cross-linked silicone rubber not only improves elasticity, but also excels in wear resistance. This is because the three-dimensional cross-linked structure enhances the overall strength of silicone rubber, slows down the occurrence of wear and fatigue, and thereby improves its service life and elastic performance.

In general, dihydroxydiphenylsilane, as a cross-linking agent for silicone rubber, effectively improves the elasticity of silicone rubber by initiating a cross-linking reaction to form a three-dimensional network structure. This enhanced elasticity makes silicone rubber more suitable for a variety of applications, including seals, spring elements, etc. where high elasticity is required.