In‐source and post‐polymerization of long chain monomers γ‐irradiated in urea canal complexes

Abstract

AbstractUrea canal complexes with hexanediol diacrylate (HDDA) and hexanediol monoacrylate (HDMA) were formed within very short time only by mixing and at relatively high temperature, at 25°C. These canal complexes were more stable even at higher temperatures than those canal complexes including short chain monomers such as acrylonitrile, vinyl chloride and 1,3‐butadiene.The rate of polymerization increased with increasing temperature. The radicals were trapped in the canal even at 25°C and the radicals caused a post‐polymerization when the temperature was elevated to values near the decomposition temperature of the canal complex, although the post‐polymerization in well‐known canal complexes occurred only at low temperature. During polymerization, the crystal lattice of the canal was destroyed and the polymerization reaction proceeded around the destroyed canal. It is considered that this polymerization was different from the polymerization in urea canal complexes including short chain monomers.