Abstract
Non-isothermal and isothermal crystallization of polylactic acid/poly(D-lactic) acid blends with various molecular weights have been investigated. Formation of polylactic acid stereocomplex crystal between L-lactic acid segments and D-lactic acid segments in the blends was confirmed by the differential scanning calorimetry and X-ray diffraction. The non-isothermal crystallization kinetics of polylactic acid and the blends was studied and analyzed by Kissinger equation. The crystallization temperature was found to depend on the content and molecular weight of poly(D-lactic) acid. Higher content and lower molecular weight of poly(D-lactic) acid have a more pronounced effect on improving crystallization temperature of the blends and effectively reduce the crystallization activation energy of the blends. Isothermal crystallization kinetics of polylactic acid and the blends was also investigated at various temperatures and analyzed by Avrami equation.
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Caixia Zhao, Yuan, J., Jingfeng, H. et al. Non-Isothermal and Isothermal Crystallization Behavior of Polylactic/Poly(D-lactic) Blends with Various Molecular Weights of Poly(D-lactic) Acid. Polym. Sci. Ser. A 61, 875–889 (2019). https://doi.org/10.1134/S0965545X19060178
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DOI: https://doi.org/10.1134/S0965545X19060178