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Chain heterogeneity of poly(lactic acid) and its influence on crystallization kinetics.
Yang, Tao; He, Shuang; Liu, Peng; Yan, Jingyao; Lu, Ruiyao; Xue, Yanhu.
Afiliación
  • Yang T; College of Chemical Engineering and Material Science, Tianjin University of Science and Technology, Tianjin 300457, PR China.
  • He S; College of Chemical Engineering and Material Science, Tianjin University of Science and Technology, Tianjin 300457, PR China.
  • Liu P; College of Chemical Engineering and Material Science, Tianjin University of Science and Technology, Tianjin 300457, PR China.
  • Yan J; College of Chemical Engineering and Material Science, Tianjin University of Science and Technology, Tianjin 300457, PR China.
  • Lu R; College of Chemical Engineering and Material Science, Tianjin University of Science and Technology, Tianjin 300457, PR China.
  • Xue Y; College of Chemical Engineering and Material Science, Tianjin University of Science and Technology, Tianjin 300457, PR China; Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China. Electronic address: xueyh@tust.edu.cn.
Int J Biol Macromol ; 277(Pt 1): 134101, 2024 Oct.
Article en En | MEDLINE | ID: mdl-39048000
ABSTRACT
Temperature rising elution fractionation (TREF) approach was used to separate a biodegradable poly(lactic acid) (PLA) resin into ten fractions and completely establish the relationship between chain microstructure and properties. The main fractions were mainly eluted at 100, 110, 114, and 118 °C, and their mass percentages were 7.98 wt%, 44.83 wt%, 19.64 wt%, and 11.90 wt%, respectively. Through the use of successive self-nucleation/annealing (SSA) thermal fractionation, gel permeation chromatography (GPC), differential scanning calorimetry (DSC), and 13C-nuclear magnetic resonance spectroscopy (13C NMR), the intermolecular and intramolecular differences of PLA were further explored. Fractions eluted at 90, 110, 118, and 126 °C were also chosen to research the non-isothermal cold crystallization kinetics, and fractions eluted at 110, 118, and 126 °C were chosen to explore the non-isothermal crystallization kinetics in order to simulate the real process. The findings demonstrated that the Liu-Mo approach were more suited the non-isothermal crystallization and non-isothermal cold crystallization kinetics of PLA. As the elution temperature increased, so did the stereoregularity of the fractions, the crystallization rate, the crystallization capacity, and the lamellar thickness. These will lay a foundation for its basic research and industrial application.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Poliésteres / Cristalización Idioma: En Revista: Int J Biol Macromol Año: 2024 Tipo del documento: Article Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Poliésteres / Cristalización Idioma: En Revista: Int J Biol Macromol Año: 2024 Tipo del documento: Article Pais de publicación: Países Bajos