Study of the partial wetting morphology in polylactide/poly[(butylene adipate)-co-terephthalate]/polyamide ternary blends: case of composite droplets

Abstract : The prediction of the morphology of ternary polymer blends requires a good knowledge of the values of the three interfacial tensions. We selected three polymers, either biobased or biodegradable, PA, PBAT and PLA and we accurately measured their interfacial tensions using the retraction method, varying the molar mass or inverting the phases. The following values of interfacial tensions were obtained: = 3.3±0.7mN/m, = 5.6±0.3mN/m and = 3.0±0.4 mN/m. These values were used to calculate the spreading coefficients giving rise to two negative coefficients and one coefficient close to zero. Ternary blends with various compositions, two different levels of viscosity for the PBAT, different processing conditions were prepared. There was a very good agreement between the predictions of the spreading theory, when using the values of interfacial tensions in the right order of magnitude, and the observed morphologies, whatever the polymer serving as a matrix. When the PLA or PBAT was chosen as the matrix, the ternary blend morphology was composed of composite droplets, presenting a partial wetting morphology, dispersed in the polymer matrix. This morphology was observed whatever the composition, the viscosity level of the PBAT phase and the processing conditions. A further calculation of the free energy confirmed this 2 morphology. The formation process of this semi-encapsulated morphology was observed during blending.
Type de document :
Article dans une revue
Liste complète des métadonnées

Littérature citée [19 références]  Voir  Masquer  Télécharger

https://hal-mines-paristech.archives-ouvertes.fr/hal-01923291
Contributeur : Edith Peuvrel-Disdier <>
Soumis le : jeudi 15 novembre 2018 - 10:41:30
Dernière modification le : mercredi 28 novembre 2018 - 01:22:26
Document(s) archivé(s) le : samedi 16 février 2019 - 13:06:35

Fichier

2nd revision-Fu et al-Polymer ...
Fichiers produits par l'(les) auteur(s)

Identifiants

Citation

Yang Fu, Gabriel Fodorean, Patrick Navard, Edith Peuvrel-Disdier. Study of the partial wetting morphology in polylactide/poly[(butylene adipate)-co-terephthalate]/polyamide ternary blends: case of composite droplets. Polymer International, Wiley, 2018, 67 (10), pp.1378 - 1385. ⟨10.1002/pi.5651⟩. ⟨hal-01923291⟩

Partager

Métriques

Consultations de la notice

22

Téléchargements de fichiers

37