Predicting the diffusion coefficient of water vapor through glassy HPMC films at different environmental conditions using the free volume additivity approach

Laksmana, Fesia Lestari; Kok, P.J.A. Hartman; Vromans, Herman; Maarschalk, Kees van der Voort

doi:10.1016/j.ejps.2009.04.011

Cited by 12 publications

(5 citation statements)

References 17 publications

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“…Laksmana et al [28] predicted diffusion coefficients of glassy polymers based on the estimation methods of the polymer fractional free volume at different environmental conditions using the model of Vrentas and Duda [27]. Moisture sorption and T g values were measured on different hydroxypropyl methylcellulose free films with varying water activities.…”

Section: Diffusion In Glassy Polymer Systemsmentioning

confidence: 99%

Glassy Polymers—Diffusion, Sorption, Ageing and Applications

et al. 2021

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For the past few decades, researchers have been intrigued by glassy polymers, which have applications ranging from gas separations to corrosion protection to drug delivery systems. The techniques employed to examine the sorption and diffusion of small molecules in glassy polymers are the subject of this review. Diffusion models in glassy polymers are regulated by Fickian and non-Fickian diffusion, with non-Fickian diffusion being more prevalent. The characteristics of glassy polymers are determined by sorption isotherms, and different models have been proposed in the literature to explain sorption in glassy polymers over the last few years. This review also includes the applications of glassy polymers. Despite having many applications, current researchers still have difficulty in implementing coating challenges due to issues such as physical ageing, brittleness, etc., which are briefly discussed in the review.

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Section: Diffusion In Glassy Polymer Systemsmentioning

confidence: 99%

Glassy Polymers—Diffusion, Sorption, Ageing and Applications

et al. 2021

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“…where γ = numerical factor that accounts for the sharing of free volumes by neighbouring molecules, V * = minimum hole volume size required and Vf = average free volume for spherical molecules in the liquid state. Equations (21) and (22) have been used by several authors [94,95] to verify the effect of FFV on gas permeability in glassy polymers.…”

Section: Permeation and Diffusion Related Propertiesmentioning

confidence: 99%

Antiplasticization of Polymer Materials: Structural Aspects and Effects on Mechanical and Diffusion-Controlled Properties

et al. 2020

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Antiplasticization of glassy polymers, arising from the addition of small amounts of plasticizer, was examined to highlight the developments that have taken place over the last few decades, aiming to fill gaps of knowledge in the large number of disjointed publications. The analysis includes the role of polymer/plasticizer molecular interactions and the conditions leading to the cross-over from antiplasticization to plasticization. This was based on molecular dynamics considerations of thermal transitions and related relaxation spectra, alongside the deviation of free volumes from the additivity rule. Useful insights were gained from an analysis of data on molecular glasses, including the implications of the glass fragility concept. The effects of molecular packing resulting from antiplasticization are also discussed in the context of physical ageing. These include considerations on the effects on mechanical properties and diffusion-controlled behaviour. Some peculiar features of antiplasticization regarding changes in Tg were probed and the effects of water were examined, both as a single component and in combination with other plasticizers to illustrate the role of intermolecular forces. The analysis has also brought to light the shortcomings of existing theories for disregarding the dual cross-over from antiplasticization to plasticization with respect to modulus variation with temperature and for not addressing failure related properties, such as yielding, crazing and fracture toughness.

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“…Laksmana et al [23] predicted diffusion coefficient of glassy polymer based on the method on the estimation of the polymer fractional free volume at different environmental conditions using the model of Vrentas and Duda [22]. On different hydroxypropyl methylcellulose free films with varying water activities, moisture sorption and Tg values were measured.…”

Section: Diffusion In Glassy Polymer Systemmentioning

confidence: 99%

Glassy Polymers – Diffusion, Sorption, Aging, and Applications

Arya¹,

Thapliyal²,

Sharma³

et al. 2021

Preprint

View full text Add to dashboard Cite

For the past few decades, researchers have been intrigued with glassy polymers, which have applications ranging from gas separations to corrosion protection to drug delivery systems. The techniques employed to examine the sorption and diffusion of small molecules in glassy polymers are the subject of this review. Diffusion models in glassy polymers are regulated by Fickian and non-Fickian diffusion, with non-Fickian diffusion being more prevalent. The characteristics of glassy polymers are determined by sorption isotherms, and different models have been proposed in the literature to explain sorption in glassy polymers during the last few years. This review also includes the applications of glassy polymer. Despite having so many applications, current researchers still have difficulty in implementing coating challenges due to issues like as physical ageing, which is briefly discussed in the review.

show abstract

Predicting the diffusion coefficient of water vapor through glassy HPMC films at different environmental conditions using the free volume additivity approach

Cited by 12 publications

References 17 publications

Glassy Polymers—Diffusion, Sorption, Ageing and Applications

Glassy Polymers—Diffusion, Sorption, Ageing and Applications

Antiplasticization of Polymer Materials: Structural Aspects and Effects on Mechanical and Diffusion-Controlled Properties

Glassy Polymers – Diffusion, Sorption, Aging, and Applications

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