Synthesis and Properties of Terpolymers Derived from Carbon Dioxide,Propylene Oxide and Phthalic Anhydride

Terpolymerization of carbon dioxide(CO2) with propylene oxide(PO) and phthalic anhydride(PA) was successfully carried out using supported zinc glutarate catalyst(s-ZnGA).Consequently giving high molecular weight poly(propylene carbonate phthalate)(PPCPA) in a very high yield.The resulting terpolymers were fully characterized by 1H-NMR and 13C-NMR techniques.The thermal and mechanical properties of PPCPA were also investigated.Thermogravimetric analysis(TGA) indicates that the decomposition temperature of PPCPA dramatically increases due to the introduction of the phenyl of PA into the backbone of terpolymer.The glass transition temperature(Tg) and tensile strength of PPCPA first increase and finally decrease with increasing PA content in PPCPA,owing to the increasing content of polyether in PPCPA.