Effect of Soluble Oligo(spiroorthocarbonate)s on the Curing Reaction of Epoxides : Relationship between Volume Shrinkage and Adhesive Strength

Abstract

Sulfonium salt-initiated cationic copolymerizations of bisphenol-A diglycidyl ether (BADGE) with a soluble oligo(spiroorthocarbonate) bearing methyl group in the side chain (Me-OSOC) were employed, and the relationship between the resulting volume change degree upon the curing reaction and the lap-shear adhesive strength were evaluated. As a result, it might be suggested that the degree of volume change decreased along with increasing the addition amount of Me-OSOC, and the resulting tensile lap-shear adhesive strength was improved.