The Present Study for the Synthesis of Lactide from Lactic Acid

Polylactic acid is one of the most promising biodegradable polymers, lactide is the intermediate for the preparation of polylactic acid from lactic acid ,the conversion of lactideis low and hamper the extensive application of PLA. In this paper, the present study for lactide synthesis from lactic acid has been reviewed for the past two decades, including the main methods of the synthesis of lactide from lactic acid, process and factors to influence the yield of lactide. Based on these, several methods of improving the yield of lactide have been brought forward.