Abstract
It is well known that vinyl monomers such as styrene and methyl methacrylate (MMA), cyclic ethers, and lactones undergo large shrinkage during polymerization. Further, network polymers such as epoxy resins, phenol resin, and unsaturated polyester undertake shrinkage on crosslinking, and this cause the big problem in the materialization.
We have already reported spiro ortho ester (SOE), spiro ortho carbonate (SOC), and bicyclo ortho ester (BOE) shows no shrinkage during cationic ring-opening polymerization.
In this article synthetic methods of vinyl monomers containing SOE, SOC, and BOE moieties are described, and polymers carrying SOE, SOC, and BOE structure as no shrinkage function in the side chain are synthesized by the their homopolymerization and copolymerization with vinyl monomers.
These polymers undergo cationic ring-opening polymerization to obtain the corresponding network polymers and showed no shrinkage during crosslinking.
