INVESTIGADORES
PEREZ Claudio Javier
artículos
Título:
Liquid-Glassy Polymer Interphases: Diffusion kinetics in conditions of unlimited liquid supply
Autor/es:
J. PABLO TOMBA, JOSE M. CARELLA, C. J. PEREZ, JOSE M. PASTOR
Revista:
MACROMOLECULAR CHEMISTRY AND PHYSICS
Editorial:
Wiley
Referencias:
Año: 2009 vol. 210 p. 359 - 359
ISSN:
1022-1352
Resumen:
We investigate evidences of diffusion controlled by mechanical relaxation of the glassy matrix, i.e. Case-II mechanism, in a series of liquid/glassy interphases formed by PS and PPO as liquid and glassy components, respectively. Diffusion experiments were performed in conditions of unlimited supply of the liquid polymer, parallel to those in which Case-II has been effectively verified. Interphase profiles were obtained via optical sectioning with confocal Raman microspectroscopy (CRM). We observed that interphase diffusion kinetics were markedly Fickean, in contrast with interpretations from other authors that invoke Case-II to explain the mechanisms that rule interphase evolution in these systems.