Effect of ZnO nanofillers treated with triehoxy caprylylsilane on the isothermal and non-isothermal crystallization of poly(lactic acid). - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Chemistry Chemical Physics Année : 2012

Effect of ZnO nanofillers treated with triehoxy caprylylsilane on the isothermal and non-isothermal crystallization of poly(lactic acid).

Pierre-Olivier Bussiere
  • Fonction : Auteur
  • PersonId : 875170
Sandrine Therias
Jean-Luc Gardette
  • Fonction : Auteur
Mohamed Baba
  • Fonction : Auteur

Résumé

The crystallization of PLA-silane surface-treated ZnO nanocomposites was investigated by DSC and compared to that of neat PLA. Several modes of crystallization were considered: isothermal and non-isothermal cold crystallization and also isothermal and non-isothermal melt crystallization. The kinetics of cold crystallization were studied using different methods, namely the Avrami and Ozawa-Flynn-Wall models, to calculate activation energies and kinetic constants. In contrast to what is typically observed when the foreign particles are added in a polymer matrix, the silane surface-treated ZnO delayed the crystallization of PLA and made it more difficult to start. The nucleation activity of the ZnO nanoparticles, , was calculated and found to be greater than 1 ( = 1.7). This indicated that ZnO played an anti-nucleating role in the crystallization of PLA nanocomposites. This effect has been linked mainly to the interactions between the silane groups onto the surface of nanoparticles and PLA macromolecules. These interactions which reduce the mobility of polymer chains have been evidenced by rheological experiments.
Fichier non déposé

Dates et versions

hal-00787153 , version 1 (11-02-2013)

Identifiants

  • HAL Id : hal-00787153 , version 1

Citer

Pierre-Olivier Bussiere, Sandrine Therias, Jean-Luc Gardette, Marius Murariu, Philippe Dubois, et al.. Effect of ZnO nanofillers treated with triehoxy caprylylsilane on the isothermal and non-isothermal crystallization of poly(lactic acid).. Physical Chemistry Chemical Physics, 2012, 14, pp.12301-12308. ⟨hal-00787153⟩
79 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More