What is the difference between the use of trialkoxysilyl groups and dialkoxysilyl groups in silane coupling agents?
While trialkoxysilyl groups cross-link three-dimensionally when hydrolyzed and condensed, dialkoxysilyl groups cross-link two-dimensionally when hydrolyzed and condensed, so dialkoxysilyl groups are more stable when adjusted to an aqueous solution. However, the trialkoxysilyl group has a higher cross-linking density with the substrate, which may result in higher adhesion.
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