The engaged species induced clustering (ENSIC) model: a unified mechanistic approach of sorption phenomena in polymers

Favre, Éric; Nguyen, Quang Trong; Clément, Robert; Néel, Jean

doi:10.1016/0376-7388(96)00060-9

Cited by 79 publications

(43 citation statements)

References 34 publications

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“…42 The behaviour is generally described with the Flory-Huggins or the engaged species induced clustering (ENSIC) model. 43 Fig. 3 shows that the comparative data obtained after 20 h of sorption seem to be consistent with an ENSIC or Flory-Huggins sorption isotherm.…”

Section: Aroma Compound Sorptionsupporting

confidence: 55%

Barrier properties of poly(lactic acid) and its morphological changes induced by aroma compound sorption

Colomines

Ducruet

Courgneau

et al. 2010

Polymer International

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properties of poly(lactic acid) and its morphological changes induced by aroma compound sorption. Polymer International, Wiley, 2010Wiley, , 59 (6), pp.818-826. 10.1002Wiley, /pi.2793 Barrier properties of poly(lactic acid) and its morphological changes induced by aroma compound sorption Gael Colomines, a Violette Ducruet, b Cécile Courgneau, b Alain Guinault a and Sandra Domenek b * The barrier properties of poly(lactic acid) (PLA) play a key role in food packaging applications. For their optimization, the influence of crystallinity on the barrier properties of PLA and the interaction of PLA with the aroma compound ethyl acetate were investigated. PLA film samples with various crystallinities were fabricated by flat die extrusion and thermocompression and compared to PLA Biophan  . The degree of crystallinity had no effect on the oxygen permeability. However, an increase of crystallinity caused a decrease in ethyl acetate sorption. The sorption isotherm of ethyl acetate obtained using microgravimetry showed a steep increase with increasing aroma activity, a form which is consistent with a plasticization effect. This behaviour was verified using differential scanning calorimetry and dynamic mechanical analysis. Sorption caused a marked decrease in the glass transition temperature well below room temperature to approximately 0• C. Furthermore, PLA underwent a solvent-induced crystallization when equilibrated in ethyl acetate atmosphere at an activity of 0.5. The results obtained show the importance of considering possible interactions between polymer and foodstuff during the optimization step of polymeric materials for food packaging applications.

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Section: Aroma Compound Sorptionsupporting

confidence: 55%

Barrier properties of poly(lactic acid) and its morphological changes induced by aroma compound sorption

Colomines

Ducruet

Courgneau

et al. 2010

Polymer International

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“…A certain form of molecular aggregation, especially at higher vapour concentrations, could modify sorption and diffusion behaviour of polymer membranes and therefore affect their transport properties [22]. Such molecular aggregation is known as clustering and can be quantified via the ENSIC model [23] which involves two key affinity-parameters, expressing relations between the penetrant species or between the polymer segments and the penetrant species, respectively. The clustering process can be considered to occur when solvent-solvent affinity is higher than solvent-polymer affinity.…”

Section: Transport Mode Of Gases and Vapours In Glassy Amorphous Polymentioning

confidence: 99%

“…The sorption isotherms have been analyzed on the basis of the ENSIC model, used for quantification of molecular aggregation or clustering [23]. This model involves two key affinity-parameters, k s , expressing the interaction between the solvent species, and k p , expressing the interaction between the polymer segments and the solvent molecules:…”

Section: Vapour Sorption and Possible Concentration Dependence Of Tramentioning

confidence: 99%

Organic vapour transport in glassy perfluoropolymer membranes: A simple semi-quantitative approach to analyze clustering phenomena by time lag measurements

Jansen

Friess

Drioli

2011

Journal of Membrane Science

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“…Sorption of a solvent molecule can be seen as an increase of the solvent volume fraction in the polymer matrix. This model was successfully applied to many systems (Favre et al 1996) involving various polymers (e.g. polydimethylsiloxane and polyethylene) and various solvents (e.g.…”

Section: Ensic Modelmentioning

confidence: 99%

“…In the 90's Favre et al have proposed a model called 'ENgaged Species Induced Clustering' (ENSIC) aiming to link solvent volume fraction in the polymer matrix to the solvent activity (Favre et al 1993(Favre et al , 1996.…”

Section: Ensic Modelmentioning

confidence: 99%

Multilayer adsorption equilibrium model for gas adsorption on solids

Thomas

Schaetzel

2012

Adsorption

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Adaptation of the ENSIC model to physisorption of nitrogen or argon on a solid surface first led to a 3 parameters model called multilayer adsorption equilibrium model (MAE model). One of these parameters is related to the formation of a multilayer of adsorbate on the solid surface. Exploitation of data from the literature pointed out that this parameter does not depend on the nature of the solid surface and an average value was calculated in the case of N 2 and Ar. As a consequence, the MAE model can be considered as a 2 parameters model. Linearization of the model was established allowing an easy determination of surface areas of macroporous and some mesoporous solids. Fitting of isotherms of meso and macroporous solids has led to promising results compared to the ones obtained with the BET model. Moreover, adaptation of this model to microporous solids can also be used for an uncomplicated determination of porous volume and external surface. Results obtained from data of the literature were close to those obtained with the t-plot model.

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The engaged species induced clustering (ENSIC) model: a unified mechanistic approach of sorption phenomena in polymers

Cited by 79 publications

References 34 publications

Barrier properties of poly(lactic acid) and its morphological changes induced by aroma compound sorption

Barrier properties of poly(lactic acid) and its morphological changes induced by aroma compound sorption

Organic vapour transport in glassy perfluoropolymer membranes: A simple semi-quantitative approach to analyze clustering phenomena by time lag measurements

Multilayer adsorption equilibrium model for gas adsorption on solids

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