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Unique Homo-Crystallization and Melting Behavior of Poly(L-lactic acid): Influence of Stereocomplex with Varied Structure |
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| Authors: | Huijun Xu Nan Chen |
| Affiliation: | 1. Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering , East China University of Science and Technology , Shanghai , China;2. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering , East China University of Science and Technology , Shanghai , China |
| Abstract: | Homo-crystallization and melting behavior of poly(L-lactic acid) (PLLA) with poly(D-lactic acid) (PDLA) (≤10 wt.%) was studied. The different thermal history had been applied to exert structural variation on stereocomplex (SC). The PLLA/PDLA blend showed different crystallization and melting behavior when cooled from 250°C or 200°C. Double melting peaks were observed after the blend was cooled from 250°C. SC annealing at different temperatures exhibited significant effect for melt-crystallization of PLLA. Influence of initial melting condition before cooling was also investigated. The cold crystallization of amorphous blend initially was studied and some novel results had been observed. |
| Keywords: | Crystallization Melting behavior Poly(D-lactic acid) Poly(L-lactic acid) Stereocomplex Thermal history |