Advances of catalysts for synthesizing lactide

Lactide is an important midbody of preparation of poly(lactic acid),the efficiency of preparation is the key factor in two-step synthesis ofPLA with high molecular weight.An efficient catalyst is the key step to achieve a higher yield.In this paper,the use of catalysts for synthesizing lactide is overviewed and the future work in this area will focus on catalyst for preparation of lactide and effiency.