Case II diffusion: effect of solvent molecule size

Gall, Thomas P.; Lasky, Ronald C.; Krämer, Edward J.

doi:10.1016/0032-3861(90)90156-s

Cited by 76 publications

(57 citation statements)

References 30 publications

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“…Mills et al [37] on studying the diffusion at 25°C of a series of 1-iodo-n-alkanes liquids into a polymer glass photoresist found that for the larger values of number of carbon atoms (n), the solvent's diffusion coefficient D decreases as n −2 prompting speculation that the longer chains (n≥4) diffuse into the glass by a reputation-like mechanism. Gall et al [38] also studied the diffusion of a series of 1-iodo-n-alkanes vapors in polystyrene and they found that the solvent's diffusion coefficient D decreased exponentially with increasing the number of carbon atoms on the alkyl chain. Contrary to Mills et al [37], Gall et al [38] have found no evidence for a reptation-like mechanism.…”

Section: Introductionmentioning

confidence: 96%

Diffusivity of alkanes in polystyrene

Bernardo

2012

J Polym Res

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Gravimetry is used to study the diffusivity of a homologous series of linear alkanes (C n , with n08, 10, 12, 14 and 16) in amorphous polystyrene at temperatures ranging from 45°C to 145°C, i.e. both below and above the polymer glass transition temperature (100°C). All the mass uptake results obtained are well described by a simple Fickian model (for t0.993, for all temperatures) with respect to the number of carbon atoms (n) in the alkyl chain, log(D) decreasing when n increases. For each liquid penetrant, over the temperature intervals considered, its log (D) also increases linearly (R 2 >0.996 for all the systems) with the decrease in the penetrant's liquid viscosity.

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Section: Introductionmentioning

confidence: 96%

Diffusivity of alkanes in polystyrene

Bernardo

2012

J Polym Res

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“…It has also been observed that large plastic strains increase the tendency for Case II diffusion [18,19]. Sanopoulo and Stamatialis [20] observed that Case II kinetics occurred for the uptake of a polymer constrained from expansion between two glass plates when the swollen polymer was sufficiently plasticised in order to deform plastically along the penetration axis to overcome the constraints imposed in the thickness direction.…”

Section: Introductionmentioning

confidence: 99%

Characterising moisture ingress in adhesively bonded joints using nuclear reaction analysis

Liljedahl

Crocombe

Gauntlett

et al. 2009

International Journal of Adhesion and Adhesives

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“…The mechanisms controlling the interdiffusion process are reasonably well understood 6,7,8,9 but predicting accurately the nature of the diffusion has been a challenging problem. It is now widely accepted that the interdiffusion of solvent into a polymer depends on solvent concentration gradient within the system as well as the rate of polymer segmental relaxation.…”

Section: 2345mentioning

confidence: 99%

Interdiffusion of solvent into glassy polymer films: A molecular dynamics study

Tsige

Grest

2004

The Journal of Chemical Physics

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Large scale molecular dynamics and grand canonical Monte Carlo simulation techniques are used to study the behavior of the interdiffusion of a solvent into an entangled polymer matrix as the state of the polymer changes from a melt to a glass. The weight gain by the polymer increases with time t as t 1/2 in agreement with Fickian diffusion for all cases studied, although the diffusivity is found to be strongly concentration dependent especially as one approaches the glass transition temperature of the polymer. The diffusivity as a function of solvent concentration determined using the one-dimensional Fick's model of the diffusion equation is compared to the diffusivity calculated using the Darken equation from simulations of equilibrated solvent-polymer solutions. The diffusivity calculated using these two different approaches are in good agreement.The behavior of the diffusivity strongly depends on the state of the polymer and is related to the shape of the solvent concentration profile. * mtsige@sandia.gov † gsgrest@sandia.gov

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Case II diffusion: effect of solvent molecule size

Cited by 76 publications

References 30 publications

Diffusivity of alkanes in polystyrene

Diffusivity of alkanes in polystyrene

Characterising moisture ingress in adhesively bonded joints using nuclear reaction analysis

Interdiffusion of solvent into glassy polymer films: A molecular dynamics study

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