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Liquid‐Glassy Polymer Interphases: Diffusion Kinetics in Conditions of Unlimited Liquid Supply
Author(s) -
Tomba J. Pablo,
Carella José M.,
Pérez Claudio J.,
Pastor José M.
Publication year - 2009
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200800581
Subject(s) - interphase , polymer , diffusion , kinetics , relaxation (psychology) , raman spectroscopy , chemical engineering , chemical physics , chemistry , materials science , polymer chemistry , thermodynamics , optics , composite material , psychology , social psychology , genetics , physics , quantum mechanics , biology , engineering
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.