Lactide is the intermediate for preparing of polylactic acid from lactic acid.The yield of lactide is the key factor to influence the extensive production and low the cost of polylactic acid.

• 丙交酯是以乳酸为原料制备高分子量聚乳酸的中间体,因此丙交酯的收率是影响聚乳酸大规模生产及其生产成本的关键因素。