A depolarized light scattering study of the phase separation process in an epoxy-elastomer blend

L. Baeke P. Thioudelet P.A. Keates 1 Patrick Navard 1
1 CEMEF - Centre de Mise en Forme des Matériaux
Abstract : Phase separation between two or more isotropic polymers is usually studied by unpolarized or polarized light scattering (SALS). Depolarized SALS has never been used, but it is also able to bring useful information about the kinetics and mechanisms of the phase separation. Such a new technique is tested here by studying the evolution of a phase separation in a pseudo-binary mixture of bis-phenol A diglycidylether (epoxy monomer), a cycloaliphatic diamine (comonomer or cross-linking agent) and an epoxy terminated butadiene-acrylonitrile random copolymer (additive). The depolarized light scattering patterns during the phase separation have four lobes positioned at 45 ° of the position of the polarizers. The position of the lobes does not vary with time, suggesting that the mechanism of spinodal decomposition is responsible for the phase separation. The resulting periodic distance between composition fluctuations is calculated from the position of the lobes using two methods. It was found in agreement with the distance deduced from the position of the scattering ring observed in unpolarized light scattering.
Keywords : Light-scattering Phase separation Thermoset
Type de document :
Article dans une revue
Liste complète des métadonnées
https://hal-mines-paristech.archives-ouvertes.fr/hal-00673849
Contributeur : Magalie Prudon <>
Soumis le : vendredi 24 février 2012 - 14:04:57
Dernière modification le : lundi 12 novembre 2018 - 10:58:34

Lien texte intégral

istex

Identifiants

Collections

ENSMP | PARISTECH | ENSMP_CEMEF | INSTITUT-TELECOM | PSL

Citation

L. Baeke, P. Thioudelet, P.A. Keates, Patrick Navard. A depolarized light scattering study of the phase separation process in an epoxy-elastomer blend. Polymer, Elsevier, 1997, 38 (21), pp.Pages 5283-5287. ⟨10.1016/S0032-3861(97)00073-6⟩. ⟨hal-00673849⟩

Exporter

BibTeX TEI DC DCterms EndNote

Partager

Métriques

Consultations de la notice

161

Contact

support.ccsd.cnrs.fr
hal.support@ccsd.cnrs.fr
Logo CCSD