Research progress in completely biodegradable poly(lactic acid) blends

Poly(lactic acid)(PLA) is a kind of aliphatic polycarbonate made from lactic acid. It exhibits good biocompatibility, biodegradability, and mechanical properties. Due to some disadvantages such as slow crystallization, high shrinkage, poor dimensional stability, weak durability and brittleness, the application of PLA is limited. Recently, much attention has been paid to modify and reinforce PLA, especially to blend PLA with other materials to prepare completely biodegradable blends or composites. Many organic or inorganic fillers and biodegradable polymers are used to blend with PLA. This paper fully introduced the completely biodegradable PLA blends and composites in recent years, and summarized the research progress.