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

Identifieur interne : 002069 ( Main/Merge ); précédent : 002068; suivant : 002070

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

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

Source :

Polymer [ 0032-3861 ] ; 1999.

RBID : ISTEX:369BF9C96456A46676720E44095BF1E85BCDBD42

Descripteurs français

Wicri :
- topic : Polymère.

English descriptors

Abstract

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.

Url:

https://api.istex.fr/document/369BF9C96456A46676720E44095BF1E85BCDBD42/fulltext/pdf

DOI: 10.1016/S0032-3861(99)00434-6

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Le document en format XML

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<author><name sortKey="Marais, S" sort="Marais, S" uniqKey="Marais S" first="S." last="Marais">S. Marais</name>
</author>
<author><name sortKey="Metayer, M" sort="Metayer, M" uniqKey="Metayer M" first="M." last="Métayer">M. Métayer</name>
</author>
<author><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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<author><name sortKey="Labbe, M" sort="Labbe, M" uniqKey="Labbe M" first="M." last="Labbé">M. Labbé</name>
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<author><name sortKey="Perrin, L" sort="Perrin, L" uniqKey="Perrin L" first="L." last="Perrin">L. Perrin</name>
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<author><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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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Academic press</term>
<term>Cluster size</term>
<term>Concentration dependence</term>
<term>Constant diffusion</term>
<term>Different activities</term>
<term>Different vapor pressures</term>
<term>Different water activities</term>
<term>Differential permeation</term>
<term>Diffusion</term>
<term>Diffusion process</term>
<term>Elsevier science</term>
<term>Ethyl cellulose</term>
<term>Exponential dependence</term>
<term>Flory interaction parameter</term>
<term>Glass transition temperature</term>
<term>Glassy state</term>
<term>High water activities</term>
<term>Isotherm</term>
<term>Langmuir sites</term>
<term>Limit diffusion</term>
<term>Local permeant concentration</term>
<term>Marais</term>
<term>Mass gain</term>
<term>Microbalance</term>
<term>Molecular species</term>
<term>Monomeric water</term>
<term>Nguyen</term>
<term>Organic vapors</term>
<term>Other words</term>
<term>Permeability</term>
<term>Permeation</term>
<term>Permeation data</term>
<term>Plane sheet</term>
<term>Polymer</term>
<term>Polymer materials</term>
<term>Present case</term>
<term>Previous paper</term>
<term>Relative mass gain</term>
<term>Same system</term>
<term>Sorption</term>
<term>Sorption chamber</term>
<term>Sorption data</term>
<term>Sorption equilibrium</term>
<term>Sorption experiments</term>
<term>Sorption isotherm</term>
<term>Sorption isotherms</term>
<term>Square root</term>
<term>Steady state</term>
<term>Steady value</term>
<term>Surface area</term>
<term>Surface phenomena</term>
<term>Time scale</term>
<term>Transient</term>
<term>Transient permeation</term>
<term>Transient permeation data</term>
<term>Transient regime</term>
<term>Transient sorption</term>
<term>Unsaturated polyester</term>
<term>Unsaturated polyester resins</term>
<term>Water activities</term>
<term>Water activity</term>
<term>Water activity increases</term>
<term>Water amount</term>
<term>Water clusters</term>
<term>Water concentration</term>
<term>Water concentrations</term>
<term>Water content</term>
<term>Water molecules</term>
<term>Water penetration</term>
<term>Water saturation pressure</term>
<term>Water sorption</term>
<term>Water uptake</term>
<term>Water vapor</term>
<term>Water vapor pressure</term>
<term>Water volume fraction</term>
</keywords>
<keywords scheme="Teeft" xml:lang="en"><term>Academic press</term>
<term>Cluster size</term>
<term>Concentration dependence</term>
<term>Constant diffusion</term>
<term>Different activities</term>
<term>Different vapor pressures</term>
<term>Different water activities</term>
<term>Differential permeation</term>
<term>Diffusion</term>
<term>Diffusion process</term>
<term>Elsevier science</term>
<term>Ethyl cellulose</term>
<term>Exponential dependence</term>
<term>Flory interaction parameter</term>
<term>Glass transition temperature</term>
<term>Glassy state</term>
<term>High water activities</term>
<term>Isotherm</term>
<term>Langmuir sites</term>
<term>Limit diffusion</term>
<term>Local permeant concentration</term>
<term>Marais</term>
<term>Mass gain</term>
<term>Microbalance</term>
<term>Molecular species</term>
<term>Monomeric water</term>
<term>Nguyen</term>
<term>Organic vapors</term>
<term>Other words</term>
<term>Permeability</term>
<term>Permeation</term>
<term>Permeation data</term>
<term>Plane sheet</term>
<term>Polymer</term>
<term>Polymer materials</term>
<term>Present case</term>
<term>Previous paper</term>
<term>Relative mass gain</term>
<term>Same system</term>
<term>Sorption</term>
<term>Sorption chamber</term>
<term>Sorption data</term>
<term>Sorption equilibrium</term>
<term>Sorption experiments</term>
<term>Sorption isotherm</term>
<term>Sorption isotherms</term>
<term>Square root</term>
<term>Steady state</term>
<term>Steady value</term>
<term>Surface area</term>
<term>Surface phenomena</term>
<term>Time scale</term>
<term>Transient</term>
<term>Transient permeation</term>
<term>Transient permeation data</term>
<term>Transient regime</term>
<term>Transient sorption</term>
<term>Unsaturated polyester</term>
<term>Unsaturated polyester resins</term>
<term>Water activities</term>
<term>Water activity</term>
<term>Water activity increases</term>
<term>Water amount</term>
<term>Water clusters</term>
<term>Water concentration</term>
<term>Water concentrations</term>
<term>Water content</term>
<term>Water molecules</term>
<term>Water penetration</term>
<term>Water saturation pressure</term>
<term>Water sorption</term>
<term>Water uptake</term>
<term>Water vapor</term>
<term>Water vapor pressure</term>
<term>Water volume fraction</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Polymère</term>
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<front><div type="abstract" xml:lang="en">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.</div>
</front>
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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

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