Diffusion and solubility of hydroxy compounds in polyolefines

Koszinowski, J.

doi:10.1002/app.1986.070310826

Cited by 21 publications

(12 citation statements)

References 4 publications

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“…There are many reports regarding the solubilities and the diffusions of additives in polymer films 1–12. To measure the diffusion coefficient and the solubility, the methods of using the permeation through a film, adsorption in a film, and release from a film have been devised 13–16.…”

Section: Introductionmentioning

confidence: 99%

New bleeding model of additives in a polypropylene film under atmospheric pressure

Wakabayashi

Kohno²,

Kimura³

et al. 2007

J of Applied Polymer Sci

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ABSTRACT:Many additives are commercially used to add more favorable qualities to films. The bleeding process by which the additive in a film comes to the surface is considered. A new bleeding model of additives in a polypropylene film under atmospheric pressure was investigated. Solubility and diffusion are found to be important for explaining this bleeding process. The solubilities and diffusion coefficients of higher fatty acid amides such as erucamide (13-cis-docosenamide) and behenamide (docosanamide) were determined between 40 and 70°C and the difference between the solubilities and the diffusion coefficients was discussed. The experimental results are explained more precisely by assuming two transport processes between the crystalline regions and the amorphous ones.

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Section: Introductionmentioning

confidence: 99%

New bleeding model of additives in a polypropylene film under atmospheric pressure

Wakabayashi

Kohno²,

Kimura³

et al. 2007

J of Applied Polymer Sci

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“…Similar effect of chain length on sorption was found for alcohols and alkanes in polyethylene. 16,17 When the sorption equilibrium of a sorbate in different sorbants is compared, properties of the sorbants are responsible for different behaviors. Polymer properties affecting transport properties are free volume, density of cohesive energy, polarity, and crystallinity, and most of them related to the presence of empty spaces where sorbate molecules can get sorbed and to the mobility of chains within the matrix (or the inter-segment interactions).…”

Section: Resultsmentioning

confidence: 99%

Effect of water presence on the sorption of organic compounds in ethylene–vinyl alcohol copolymers

Aucejo

Pozo

Gavara

1998

J of Applied Polymer Sci

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Sorption isotherms of methanol, ethanol, propanol, butanol, hexanol, ethyl caproate, and limonene in 4 ethylene-vinyl alcohol (EVOH) copolymers with different ethylene contents were determined by inverse gas chromatography (IGC) at 25°C and different relative humidity conditions. From sorption isotherms, solubility coefficients were determined and used as a tool for comparison. Besides affecting the morphology of the polymers by plastification, sorbed water seems to increase the polarity of the medium. Sorption of alcohols increases at high relative humidity; both plasticization and polarity cause this behavior. The effect is more important for the smaller alcohols and among polymers for those with low ethylene content. As the sorbant becomes nonpolar, plasticization and polarity effects become antagonistic. Indeed, the effect of water presence in sorption of hexanol is not significant, and sorption of limonene and ethyl caproate is even reduced at high water content.

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“…A study of the diffusion the behavior of linear alkanes, linear alcohols and substituted phenols in polyolefins, showed that as the number of carbon atoms increased, both the alcohols and phenols approached the behavior of the alkanes as a consequence of the increased shielding of the –OH group [ 24 ]. This finding was attributed to the high degree of rotational freedom about the carbon–carbon bond of the longer chains, leading to chains folding back upon themselves, as a consequence of intramolecular interactions involving the flexible methylene groups composing the carbon chain.…”

Section: Discussionmentioning

confidence: 99%

The Influence of Oily Vehicle Composition and Vehicle-Membrane Interactions on the Diffusion of Model Permeants across Barrier Membranes

et al. 2021

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In many instances, one or more components of a pharmaceutical or cosmetic formulation is an oil. The aims of this study were two-fold. First, to examine the potential of preferential uptake of one oily vehicle component over another into a model barrier membrane (silicone) from blended vehicles (comprising two from the common excipients isohexadecane (IHD), hexadecane (HD), isopropyl myristate (IPM), oleic acid (OA) and liquid paraffin). Second, to study the effect of membrane-vehicle interactions on the diffusion of model permeants (caffeine (CF), methyl paraben (MP) and butyl paraben (BP)) from blended vehicles. Selective sorption and partition of some oils (especially IHD and IPM) at the expense of other oils (such as OA) was demonstrated to take place. For example, the membrane composition of IHD was enriched compared to a donor solution of IHD-OA: 41%, 63% and 82% IHD, compared to donor solution composition of 25%, 50% and 75% IHD, respectively. Pre-soaking the membrane in IHD, HD or LP, rather than phosphate buffer, enhanced the flux of MP through the membrane by 2.6, 1.7 and 1.3 times, respectively. The preferential sorption of individual oil components from mixtures altered the barrier properties of silicone membrane, and enhanced the permeation of CF, MP and BP, which are typically co-formulated in topical products.

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Diffusion and solubility of hydroxy compounds in polyolefines

Cited by 21 publications

References 4 publications

New bleeding model of additives in a polypropylene film under atmospheric pressure

New bleeding model of additives in a polypropylene film under atmospheric pressure

Effect of water presence on the sorption of organic compounds in ethylene–vinyl alcohol copolymers

The Influence of Oily Vehicle Composition and Vehicle-Membrane Interactions on the Diffusion of Model Permeants across Barrier Membranes

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