Premium
Water diffusion in unsaturated polyester films. Effect of plasticization on the glass transition
Author(s) -
Marais S.,
Metayer M.,
Labbe M.,
Legras M. T.,
Saiter J. M.
Publication year - 1999
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.11543
Subject(s) - plasticizer , materials science , diffusion , differential scanning calorimetry , glass transition , fick's laws of diffusion , polyester , polymer , sorption , polymer chemistry , thermodynamics , chemical engineering , composite material , chemistry , physics , adsorption , engineering
Water diffusion through Unsaturated Polyester Resin (UPR) is investigated. From differential scanning calorimetry, we observe that the plasticization effect due to water sorption leads to large variations of T g and is a reversible phenomenon. The transport of water through the polymer is characterized with a new instrument developed in our laboratory which shows that the water transport deviates from Fickian behavior. It is found that the diffusion coefficient is not a constant and experimental data are in good agreement with D = D o e γC where γ is a plasticization coefficient.