Isothermal Crystallization Behavior of Poly(L-lactic acid)/Organo-Montmorillonite Composites

摘要

In this research, organo-montmorillonite (OMMT) was synthesized by ion exchange technology. Then the poly(L-lactic acid)(PLLA)/ OMMT composites were fabricated using melt blending and hot-press forming. The isothermal crystallization behavior of PLLA/OMMT composites was investigated in detail and isothermal crystlltzation behavior was affected by crystallization temperature and organo- montmorillonite content. Compared to the neat polyfL-lactic acid), the half-time of poly(L-lactic acid) with 5 % organo-montmorillonite decreases from 2991.5s to 327s. and the kinetic of isothermal crystallization of PLLA/OMMT was described by Avrami theory and the results showed that PLLA/OMMT composite had complicated nucleation mechanism.