Environmentally friendly poly(lactic acid)

摘要

Poly(lactic acid) films were prepared by melt-extrusion and then drawn at 90°C. These samples were soaked in acetone for 1 min. The films in acetone became cloud by the crystallization and the generation of void. The crystalliniity of the soaked drawn film was as same as that of the soaked undrawn film. The melting point of the soaked film unexpectedly decreased with the increase of draw ratio. The crystallization mechanism by heat is different from that by solvent.