Synthesis and radical polymerization of 2-vinylcyclopropanes

摘要

The radical polymerization of I,1-disubstituted 2-vinylcyclopropanes with electron-withdrawing substituents results in polymers with mainly 1,5-ring-opened units. Moreover, they show a significant lower volume shrinkage during their ring-opening polymerization than other vinyl monomers, such as methacrylates. New asymmetric. 1,1-disubstituted 2-vinylcyclopropanes were synthesized and polymerized. Hybrid 2-vinylcyclopropanes were polymerized step-by-step under the formation of reactive polymers and polymer networks. Multifunctional cross-linking vinylcyclopropanes were used as new low-shrinking matrix monomers for photopolymerizable materials. In addition, the sol-gel process of trialkoxy-silyl-functionalized 2-vinylcyclopropanes afforded low shrinking organic-inorganic nanocomposites. [References: 17]