Zinc Amido-Oxazolinate Catalyzed Ring Opening Copolymerization and Terpolymerization of Maleic Anhydride and Epoxides.

摘要: Ring opening copolymerization (ROCOP) of epoxides and cyclic anhydrides has become an attractive approach for the synthesis biodegradable polyesters with various compositions. Encouraged by efficiency versatility a series amido-oxazolinate zinc complexes, in this study they were shown to be active catalysts unsaturated via ROCOP maleic anhydride epoxides. The relative activity these reactions was observed styrene oxide > cyclohexene phenyl glycidyl ether, which could correlated electronic steric features substrate. To provide more structural possibilities polyesters, difference epoxide reactivity exploited attempt prepare block terpolymers from one two Terpolymerization carried out or steps single pot. thermal characterization thermogravimetric analysis (TGA) differential scanning calorimetry (DSC) techniques suggested that resulting materials mostly random terpolymers.