Diffusion and sorption of CO2 in poly(ethylene terephthalate) and poly(ethylene naphthalate)

Brolly, J. B.; Bower, D. I.; Ward, I. M.

doi:10.1002/(sici)1099-0488(199603)34:4<769::aid-polb18>3.0.co;2-f

Cited by 32 publications

(26 citation statements)

References 20 publications

(5 reference statements)

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“…. For PET Similar D sorp values were also observed in other studies [40][41][42]. The variability of first sorption was higher than the others cycles, and for desorption steps, the equilibrium was reached faster than for sorption.…”

Section: Diffusion Propertiessupporting

confidence: 86%

How high pressure CO2 impacts PLA film properties

Rocca-Smith¹,

Lagorce-Tachon²,

Iaconelli³

et al. 2017

Express Polym. Lett.

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Abstract. This work investigated the sorption and the diffusion properties of CO 2 under high pressure and the further modifications induced in Poly(lactic acid) (PLA) thin layers. Poly(ethylene terephtalate) (PET) was also considered for comparative purposes. Firstly, from thermodynamic equilibrium, the CO 2 sorption isotherm (two sorption-desorption cycles, up to 25 bar, at 25°C) gave strong evidence of a physisorption mechanism and of a hysteresis phenomenon. Infrared spectroscopy analysis confirmed that no chemical reaction occurred. Secondly, from the kinetics aspect, the CO 2 diffusion coefficient was found around 10 -13 m 2 ·s -1 and was slightly faster for sorption compared to desorption. Additionally, when CO 2 sorption occurred, the PLA structure and its functional properties were modified due to plasticization and swelling. CO 2 plasticization reduced the glass transition temperature of PLA and accelerated the physical ageing of the polymer. These results are therefore of significant importance in industrial processing and applications which involve close contact between CO 2 and PLA.

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Section: Diffusion Propertiessupporting

confidence: 86%

How high pressure CO2 impacts PLA film properties

Rocca-Smith¹,

Lagorce-Tachon²,

Iaconelli³

et al. 2017

Express Polym. Lett.

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“…The reader is also referred to published work by Ward and coworkers [24], and Vieth and coworkers [25]. Consistent with our results, these reports suggest that with limited information about sample processing conditions, definite conclusions about the effect of orientation on the number of non-equilibrium sites in the non-annealed, oriented film may not be drawn.…”

Section: Equilibrium Sorptionmentioning

confidence: 99%

Sorption and transport of methanol in poly(ethylene terephthalate)

Chandra

Koros

2009

Polymer

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“…Intermediate values of n suggest a combination of these two mechanisms. On the other hand, the discrepancies between the experimental sorption and desorption curves are representative of different kinetics and then, of a concentration-dependent diffusion coefficient (Crank, 1975;Brolly et al, 1996aBrolly et al, , 1996b). …”

Section: Mechanisms Of Diffusionmentioning

confidence: 99%

“…According to them, the dualmode sorption model is based on a correct mathematical description but on invalid physical assumptions, which are the existence of two different populations of diffusing molecules and the absence of gas-polymer interactions. Also, let us quote Brolly et al (1996aBrolly et al ( , 1996b who determined experimentally the effective coefficients of solubility and diffusion of CO 2 in PET and in PEN, at room temperature, the pressure varying from 0.0125 to 0.5 MPa. These authors used the finite difference modelling for obtaining the parameters relative to the two models and so the variations of the effective diffusion coefficient with the penetrant concentration.…”

Section: Comparison Of These Two Modelsmentioning

confidence: 99%

Transport Properdines of Gases in Polymers: Bibliographic Review

Klopffer

Flaconnèche

2001

Oil & Gas Science and Technology - Rev. IFP

253

196

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Résumé -Transport de molécules gazeuses dans les polymères : revue bibliographique -Après quelques rappels concernant les lois classiques des phénomènes de transport, cet article, purement bibliographique, présente les différents modèles théoriques proposés pour décrire le mécanisme de transport d'espèces chimiques dans les polymères par diffusion moléculaire. Il s'appuiera ensuite sur de nombreuses études menées antérieurement, pour montrer que la perméabilité des gaz (ou vapeurs organiques) dépend fortement de la structure du polymère (cristallinité, histoire thermomécanique), de la taille et de la nature du pénétrant ainsi que des conditions de température et de pression.Mots-clés : polymère, gaz, perméabilité, diffusion, solubilité. Abstract -Transport Properties of Gases in

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Diffusion and sorption of CO2 in poly(ethylene terephthalate) and poly(ethylene naphthalate)

Cited by 32 publications

References 20 publications

How high pressure CO2 impacts PLA film properties

How high pressure CO2 impacts PLA film properties

Sorption and transport of methanol in poly(ethylene terephthalate)

Transport Properdines of Gases in Polymers: Bibliographic Review

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