Thermodynamics of cationic ring-opening polymerization.- Cyclic oligomers in the cationic ring opening polymerization.- Oxiranes.- Oxetanes.- Oxolanes (Tetrahydrofurans).- Cyclic acetals.- Bicyclic monomers.- Polymers from cyclic esters.- Polymines and polysulfides.- Polyamides.- Polysiloxanes.- Polysiloxanes.- Phosphorus-containing polymers.- Cationic copolymerization of heterocyclic monomers.