Abstract
Ring-opening polymerization of cyclic carbonates was studied. Volume expansion during polymerization of cyclic carbonates could be explained by the difference between intermolecular interaction of monomers and polymers, which was evaluated by dipole moment. A seven-membered cyclic carbonate polymerized much faster than a six-membered one. Bulky substituents of six-membered cyclic carbonates increased the equilibrium monomer concentration. A novel initiator system, combination of alcohol and trifluoroacetic acid, efficiently polymerized cyclic carbonates.
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