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Effect of molecular weight on crystallization behavior of poly (lactic acid) under isotherm and non‐isotherm conditions

Article dans une revue avec comité de lecture
Auteur
ZIRAK, Nader
ccSHIRINBAYAN, Mohammadali
FARZANEH, Sedigheh
571200 P4Tech [P4Tech]
ccTCHARKHTCHI, Abbas
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/21756
DOI
10.1002/pat.5603
Date
2022
Journal
Polymers for Advanced Technologies

Résumé

The effect of molecular weight on the crystallization behavior of poly(lactic acid) (PLA) both isothermally and non-isothermally was studied using differential scanning calorimetry and polarized optical microscopy. Two distinct crystal forms (α and α′) were investigated under normal conditions of crystallization for different molecular weights. Using microscopy, the growth rate of spherulites was measured and the nucleation rate was estimated. Heterogeneous nucleation and morphology with a variant α and α′ forms have been proposed. Spherulites from low molecular mass PLA contained more interlamellar amorphous phase. In addition, the results showed more rapid crystallization of α′ than the α form in isothermal conditions.

Fichier(s) constituant cette publication

Nom:
PIMM_ PAT_ 2021_TCHARKHTCHI.pdf
Taille:
3.285Mo
Format:
PDF
Fin d'embargo:
2022-07-01
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  • Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM)

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