Department;
of;
Chemistry,;
Wuhan;
University,;
Wuhan;
430072,;
China;
Department;
of;
Chemistry,;
Wuhan;
University,;
Wuhan;
430072,;
China;
Department;
of;
Chemistry,;
Wuhan;
University,;
Wuhan;
430072,;
China;
enzymatic; ring-opening; copolymerization,; poly(trimethylene; carbonate-co; ethylene; ethyl; phosphate),; polycarbonates,; polyphosphates,; lipase.;