Non-Isothermal and Isothermal Crystallization Behavior of Polylactic/Poly(D-lactic) Blends with Various Molecular Weights of Poly(D-lactic) Acid

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 diffe...

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Bibliographic Details
Published inPolymer Science. Series A Vol. 61; no. 6; pp. 875 - 889
Main Authors Caixia Zhao, Yuan, Jie, Jingfeng, Huaung, Zou, Guoxiang, Li, Jinchun
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.11.2019
Springer Nature B.V
Subjects
Avrami equation
Biodegradable materials
Chemistry
Chemistry and Materials Science
Crystallization
Kinetics
Mixtures
Molecular weight
Polylactic acid
Polymer Blends
Polymer Sciences
Segments
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Summary: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.
ISSN:0965-545X
1555-6107
DOI:10.1134/S0965545X19060178