Synthesis of grafted polysilsesquioxane by ring-opening polymerization of lactide and trimethylene carbonate

The polysilsesquioxane containing 3-aminopropyl and phenyl groups was used as the macroinitiator for the graft polymerization of 1,3-trimethylene carbonate and L-(-)-lactide. The ring-opening polymerizations of the monomers by the use of 1-trimethylsilylimidaozle catalyst proceeded effectively to afford the grafted polysilsesquioxanes. In the obtained polysilsesquioxanes, the effects of polysiloxane main chain on the thermal properties of the grafted polymers were observed.