Abstract

Abstract Silyl peroxides have previously been shown to promote the adhesion in a broad range of polymer/substrate and polymer/polymer systems. A correlation between the chemical composition of silyl peroxides and their ability to bond clearly exists. Their effectiveness is usually enhanced with increasing number of reactive sites. Whilemany reactive functional groups are useful, the presence of at least one peroxy group appears to be a necessity. Silyl peroxides are heat-activated. Strength of joints made of silyl peroxides are shown to depend on the extent of their dissociation which can be accelerated or retarded with known radical accelerators or retarders, respectively. Adhesion is believed to result from a sequence of silyl peroxide initiated, free radical reactions taking place during the curing step. This hypothesis is consistent with the kinetic behavior of the silyl peroxides. Internal reflection infrared study reveals that the areas immediately surrounding the interface are diffused layers of si...

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