Terpolymer for controllable degradation of carbon dioxide/epoxide/lactone and preparation method thereof

A ter-copolymer for controlling to degrade carbon dioxide/epoxide/lactone and the producing method thereof are provided. The ter-copolymer is named of lactone-epoxide-carbon dioxide. The invention increases the polycarbonate hydrophilicity and biodegradation capacity by introducing the lactone unit containing easy hydrolysis group and bonding easy hydrolysis group on the aliphatic polycarbonate molecular chain and regulates the polycarbonate degradation speed and further achieves the controlled material degradation by controlling the content of the ester-containing unit.