Abstract: Several synthetic routes of hydroxyl functionalized polyester, including linear polycondensation, ringopening polymerization, hydroxyl group protection and deprotection, introducing hydroxyl group into the side chain of polyester and enzymatic polymerization, were introduced. The characteristics of every synthetic route were compared. Taking synthetic route by linear polycondensation, raw materials are rich and cheap, but reaction conditions are harsh. Taking synthetic route by ringopening polymerization, reaction time is short and performances of product are good, but cost of separating and recovering is high. Taking synthetic route by hydroxyl group protection and deprotection, experimental procedure is complex and yield of product is low. Taking synthetic route by introducing hydroxyl group into side chain of polyester, preparation of raw materials is not easy, so cost of the products is high. Taking synthetic route by enzymatic polymerization, reaction conditions are mild, but lipase is expensive and cost of the products is high.

Key words: hydroxyl functionalized, polyester, synthesis