Abstract: The studies of phosphite applied in the synthesis, processing and modification of PLA in recent years were reported in this paper. Phosphite, as a secondary antioxidant and a chain extender, not only improved the antioxidation performance, but also the processing stability and mechanical properties of PLAn. The prospect of the application of phosphite in PLA was discussed as well in the paper.

Key words: poly lactic acid, phosphite, reactive extrusion, reactive compatibilization