LrgpV1, Main, Merge, bibRecord, 001F58

Permeametric and microgravimetric studies of sorption and diffusion of water vapor in an unsaturated polyester

Identifieur interne : 001F58 ( Main/Merge ); précédent : 001F57; suivant : 001F59

Permeametric and microgravimetric studies of sorption and diffusion of water vapor in an unsaturated polyester

Auteurs : S. Marais [France] ; M. Metayer [France] ; T. Q. Nguyen [France] ; M. Labbe [France] ; L. Perrin [France] ; J. M. Saiter [France]

Source :

Polymer : (Guildford) [ 0032-3861 ] ; 2000.

RBID : Pascal:00-0083173

Descripteurs français

Pascal (Inist)
- Maléate copolymère, Isophtalate copolymère, Copolymère insaturé, Diffusion molécule, Reprise humidité, Perméabilité vapeur eau, Etude expérimentale, Effet activité eau.

English descriptors

KwdEn :
- Experimental study, Isophthalate copolymer, Maleate copolymer, Moisture regain, Molecule scattering, Steam permeability, Unsaturated copolymer.

Abstract

A detailed analysis of the sorption equilibrium and the diffusion of water vapor under different activities through an unsaturated polyester resin (UPR) has been undertaken by differential permeation and microgravimetry techniques. The BET-type III sorption isotherm obtained by microgravimetry was analyzed with the Zimm-Lundberg approach to determine the mean cluster size in the UPR film: the latter increases drastically with the water content in the film. The transient permeation flux can be well fitted when a concentration-dependent diffusivity of exponential type is used. From the water content at sorption equilibrium and the steady-state permeability, a mean diffusion coefficient for the steady state can be determined; its decrease with increasing water activity is consistent with the increase in the mean cluster size.

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Pascal:00-0083173

Le document en format XML

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<term>Isophthalate copolymer</term>
<term>Maleate copolymer</term>
<term>Moisture regain</term>
<term>Molecule scattering</term>
<term>Steam permeability</term>
<term>Unsaturated copolymer</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Maléate copolymère</term>
<term>Isophtalate copolymère</term>
<term>Copolymère insaturé</term>
<term>Diffusion molécule</term>
<term>Reprise humidité</term>
<term>Perméabilité vapeur eau</term>
<term>Etude expérimentale</term>
<term>Effet activité eau</term>
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<front><div type="abstract" xml:lang="en">A detailed analysis of the sorption equilibrium and the diffusion of water vapor under different activities through an unsaturated polyester resin (UPR) has been undertaken by differential permeation and microgravimetry techniques. The BET-type III sorption isotherm obtained by microgravimetry was analyzed with the Zimm-Lundberg approach to determine the mean cluster size in the UPR film: the latter increases drastically with the water content in the film. The transient permeation flux can be well fitted when a concentration-dependent diffusivity of exponential type is used. From the water content at sorption equilibrium and the steady-state permeability, a mean diffusion coefficient for the steady state can be determined; its decrease with increasing water activity is consistent with the increase in the mean cluster size.</div>
</front>
</TEI>
<affiliations><list><country><li>France</li>
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<name sortKey="Labbe, M" sort="Labbe, M" uniqKey="Labbe M" first="M." last="Labbe">M. Labbe</name>
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<name sortKey="Nguyen, T Q" sort="Nguyen, T Q" uniqKey="Nguyen T" first="T. Q." last="Nguyen">T. Q. Nguyen</name>
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<name sortKey="Saiter, J M" sort="Saiter, J M" uniqKey="Saiter J" first="J. M." last="Saiter">J. M. Saiter</name>
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Permeametric and microgravimetric studies of sorption and diffusion of water vapor in an unsaturated polyester

Permeametric and microgravimetric studies of sorption and diffusion of water vapor in an unsaturated polyester

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri