Nonisothermal Cold Crystallization Kinetics of Poly (lactic acid)/Bacterial Poly (hydroxyoctanoate) (PHO)/Talc

Abstract: The effects of bacterial poly (hydroxyoctanoate) (PHO) and talc on the nonisothermal cold crystallization behaviours of poly (lactic acid) (PLA) were analysed with differential scanning calorimetry (DSC), and the thermal stability of the samples was observed with thermal gravimetric analysis (TGA). The modified Avrami’s model was used to describe the nonisothermal cold crystallization kinetics of neat PLA and its blends. The activation energies E for nonisothermal cold crystallization were calculated by the isoconversional method of Kissinger-Akahira-Sunose (KAS). The DSC results showed that the PLA/PHO blends were immiscible in the whole studied range, and as the PHO and talc content increased, the crystallization rate of PLA accelerated, and the crystallinity of PLA in the PLA samples increased. The values of the Avrami exponent indicated that the nonisothermal cold crystallization of the neat PLA and its blends exhibited heterogeneous, three-dimensional spherulitic growth. The E values were strongly dependent on PHO and talc. The TGA results showed that the presence of PHO and talc slightly influenced the thermal stability of PLA.

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch

Erschienen in
Nonisothermal Cold Crystallization Kinetics of Poly (lactic acid)/Bacterial Poly (hydroxyoctanoate) (PHO)/Talc ; volume:17 ; number:1 ; year:2019 ; pages:1266-1278 ; extent:13
Open chemistry ; 17, Heft 1 (2019), 1266-1278 (gesamt 13)

Urheber
Alhaddad, Omaima
El-Taweel, Safaa H.
Elbahloul, Yasser

DOI
10.1515/chem-2019-0138
URN
urn:nbn:de:101:1-2410161626243.525542695361
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
15.08.2025, 07:33 MESZ

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Beteiligte

  • Alhaddad, Omaima
  • El-Taweel, Safaa H.
  • Elbahloul, Yasser

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