Diffusion and solubility of <i>n</i>‐alkanes in polyolefines

Koszinowski, J.

doi:10.1002/app.1986.070320501

Cited by 32 publications

(19 citation statements)

References 20 publications

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“…In our experiments, an excess of mineral oil was used and the data generated correspond to a relatively long time frame compared with the printing process time. Such diffusion coefficients are relatively small compared with those reported in the literature8 for diffusion of n ‐alkanes in various elastomeric polymer membranes.…”

Section: Resultsmentioning

confidence: 63%

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Diffusion of mineral oil in styrene‐butadiene polymer films

Fouchet¹

2008

J of Applied Polymer Sci

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Mineral oil diffusion in styrene-butadiene polymer films was investigated with a simple gravimetric sorption method. Over the selected range of temperatures and film thicknesses for which sorption tests were performed, the diffusion process is described in terms of Fick's third law. Polymer dissolution was found to compete with the diffusion process especially at high temperature. Possible interference due to dissolution on data generated using a gravimetric method, resulted in an estimation of apparent activation energy using diffusion coefficient set calculated with Crank's half-time relationship. The mineral oil diffusion activation energy was found to be relatively high compared with those of hydrocarbons diffusing in natural and synthesized rubbers or crosslinked polybutadiene as reported in the literature. The influence of polymer T g , crosslinking density, and polarity on mineral oil ability to penetrate polymer film was evaluated in terms of percent weight increase over time. Maximum absorption after 60-min sorption time linearly correlates with mineral oil absorption rate for polymers prepared with different structures. This linear relationship suggests that diffusion of solvent in styrene-butadiene polymers reveals the macroscopic composition and structural polymer modification rather than local changes.

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Section: Resultsmentioning

confidence: 63%

“…Plotting Log D versus 1/ RT gives an activation energy of 37.16 KJ/mole and a D 0 of 2.6E‐07 m 2 /s. This is a high energy barrier for a diffusion process 8, 9. Studies investigating solvent transport in different polymer types usually indicate activation energy in the range from 2 to 25 KJ/mole.…”

Section: Resultsmentioning

confidence: 99%

Diffusion of mineral oil in styrene‐butadiene polymer films

Fouchet¹

2008

J of Applied Polymer Sci

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“…As described, the sorption of volatiles in each polymer increased when the tested compound was less volatile (lower partial pressure). The in¯u-ence of volatility (or the opposite eOE ect of condensability) of sorbates on the solubility coe cient has been reported for diverse organic compounds and polymer materials (Koszinowski 1986, HernandezMunÄ oz et al 1999a. The comparison between the two tested polymers shows the compatibility with the compound.…”

Section: Resultsmentioning

confidence: 96%

“…Ethyl caproate and phenylethanol were sorbed in similar amounts for a given food or food simulant. Many properties of food, polymer and aroma can cause this behaviour; for instance, polarity and condensation of the aroma compounds are commonly reported in the interpretation of mass transport (Koszinowski 1986). The low volatility of ethyl caproate and phenylethanol may be the most contributing factor.…”

Section: Resultsmentioning

confidence: 99%

Simple method for the selection of the appropriate food simulant for the evaluation of a specific food/packaging interaction

Hernández‐Muñoz

Catalá²,

Gavara³

2002

Food Additives & Contaminants

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Knowledge of the extent of food/packaging interactions is essential to provide assurance of food quality and shelf life, especially in migration and sorption processes that commonly reach equilibrium during the lifetime of a commercial packaged foodstuff. The limits of sorption and migration must be measured in the presence of the specific food or an appropriate food simulant. The partition equilibrium of food aroma compounds between plastic films and foods or food simulants (K(A,P/L) has been characterized. Two polymers (LLDPE and PET), three organic compounds (ethyl caproate, hexanal and 2-phenylethanol), four food products with varying fat content (milk cream, mayonnaise, margarine and oil) and three simulants (ethanol 95%, n-heptane and isooctane) were selectedfor study. The results show the effect of the aroma compound volatility, and polarity, as well as its compatibility with the polymer and the food or food simulant. Equilibrium constants for the organic compound between the polymers and a gaseous phase (K(A,P/V)) as well as between the food (or food simulant) and a gaseous phase (K(A,L/V)) were also determined. An approach is presented to estimate K(A,P/V) from the binary equilibrium constants K(A,P/V) and K(A,L/V). Calculated results were shown to describe experimental data very well and indicated that compatibility between the aroma and the food or food simulant is the main contributing factor to the partition equilibrium describing the extent of food/packaging interactions. Therefore, the measurement of liquid/vapour equilibrium can be regarded as a powerful tool to compare the effectiveness of food simulants as substitutes of a particular food product and can be used as a guide for the selection of the appropriate simulant.

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“…S IGNIFICANT ATTENTION HAS now been focused on the examination of the transport behavior of polymers because of its considerable technological importance in connection with biomedical devices, protective coatings such as paints and varnishes, electronic devices, packaging materials for foods and vegetables and processes such as ultra-filtration, electrodialysis, and pervaporation [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Transport of Aromatic Hydrocarbons through EPDM/NBR Blends

Manoj

Kumari

Rajesh

et al. 2010

Journal of Elastomers & Plastics

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The effect of blend ratio on the cure and transport characteristics of EPDM/NBR blends has been investigated. Cure studies showed that the maximum torque values increased with increase of the percentage of NBR in the blend system. As the percentage of NBR in the blends increased, the penetrant transport has been found to be decreased. The experimental observations have been correlated with the morphology of the blends; attested by SEM photographs. The equilibrium sorption with respect to the nature of penetrant has been observed to follow the order: benzene 4 toluene 4 xylene for a given blend ratio. A minor deviation from Fickian trend has been observed for the mechanism of transport. The experimental observations have been compared with the existing theoretical models.

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Diffusion and solubility of n‐alkanes in polyolefines

Cited by 32 publications

References 20 publications

Diffusion of mineral oil in styrene‐butadiene polymer films

Diffusion of mineral oil in styrene‐butadiene polymer films

Simple method for the selection of the appropriate food simulant for the evaluation of a specific food/packaging interaction

Transport of Aromatic Hydrocarbons through EPDM/NBR Blends

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