Sorption and diffusion of water in glass ribbon-reinforced composites

Mehta, Bharat; Dibenedetto, A. T.; Kardos, J. L.

doi:10.1002/app.1977.070211122

Cited by 23 publications

(14 citation statements)

References 3 publications

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“…The one-dimensional diffusion process taking place through two large opposite faces of a solid slab material ( Figure 1 Equation (5) can be rewritten for the case of composites containing a highly permeable fibre phase, as As reported by Bonniau and Bunsell, all the plots represented by equations (5), (6.a) and (6.b) merge into one line during the initial part of the diffusion process, so that this initial linear part of the diffusion curve can well be used to evaluate the concentration independent composite diffusion coefficient. Now, equation (6.b) can be rewritten as,…”

Section: Theorymentioning

confidence: 99%

“…Bonniau and Bunsell [4] applied two different diffusion models (single and two phase models) for glass-epoxy composites and concluded that the diamine cured composite obeyed the Fickian diffusion model. Mehta et al [5] reported that glass-ribbon reinforced cellulose acetate films behaved anomalously due to an 290 internal stress phenomenon. They discussed the significance of a structure factor in impermeable fibre based polymer composites.…”

Section: Introductionmentioning

confidence: 99%

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A Fickian Diffusion Model for Permeable Fibre Polymer Composites

Rao

Chanda

Balasubramanian³

1983

Journal of Reinforced Plastics and Composites

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A brief description of the Fickian diffusion behaviour in polymer composites, containing impermeable fibres (glass and graphite) is presented. The applicability of such a model to composites based on a permeable fibre phase (jute) is verified, both under the influence of varied internal (fibre volume fraction) and external (ambient temperature) factors. Very good correlations are found between the experimental data and a modified Fickian diffusion plot. The significance of a resin impregnated fibre volume fraction in such a composite is highlighted.

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Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Fickian Diffusion Model for Permeable Fibre Polymer Composites

Rao

Chanda

Balasubramanian³

1983

Journal of Reinforced Plastics and Composites

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“…The sorption and diffusion of low molecular weight substances such as water into polymers is often sensitive to any change in segment mobility or spatial arrangement of polymer chains. 1 For many applications, knowledge of the water absorption properties is important. Natural fibers such as jute are potentially hydrophilic because of the presence of hydroxyl (cellulose) groups.…”

Section: Introductionmentioning

confidence: 99%

Water absorption behavior of acrylonitrile‐butadiene (NBR) latex impregnated jute nonwoven fabric composites

Kumar

Siddaramaiah²

2006

J of Applied Polymer Sci

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ABSTRACT:Composites were fabricated by impregnating the jute nonwoven fabric in acrylonitrile-butadiene (NBR) latex. The effect of different pickup ratio (dry, wt/wt) of NBR latex to jute nonwoven fabric, viz., 0.5 : 1, 1 : 1.5, 1.5 : 1, 2 : 1, and 2.5 : 1 on the water absorption behavior of the composites were evaluated. Water absorption studies were carried out at different temperatures, viz. 30, 50, and 70°C, based on immersion weight gain method. From the sorption result, the diffusion (D) and permeation (P) coefficients of water penetrant have been calculated. Significant increase in the diffusion and permeation coefficients was observed with increase in the temperature of sorption experiments. Drastic reductions in diffusion and permeation coefficients were noticed with increase in the pickup ratio of NBR on to jute nonwoven fabric. Attempts were made to estimate the empirical parameters like n, which suggests the mode of transport, and K is a constant that depends on the structural characteristics of the composite in addition to its interaction with water. The temperature dependence of the transport coefficients has been used to estimate the activation energy parameter for diffusion (E D ) and permeation processes (E p ) from Arrhenius plots.

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“…Pan et al 7 discussed the permeation of water vapor through cellulose membranes. Mehta et al 8 studied the sorption and diffusion of water in glass rubber-reinforced composites, while Sacher and Susko 9 reported the permeation of polyimide films. Some recent studies were conducted on the transport of various organic solvents through rubbery polymers.…”

Section: Introductionmentioning

confidence: 99%

Barrier properties of electron-beam-modified EPDM rubber

Majumder

Bhowmick

Majali

et al. 2000

J. Appl. Polym. Sci.

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EPDM rubber was surface-and bulk-modified with varying concentrations of trimethylol propane triacrylate (TMPTA) in the presence of a constant electron-beam irradiation dose of 100 kGy and over a wide range of irradiation doses from 0 to 200 kGy at a fixed TMPTA concentration (10%). The permeation rate and absorption of three homologous nonpolar solvents, namely, n-hexane, n-heptane, and n-octane, along with an aromatic solvent, toluene, and a polar solvent, trichloroethylene, through unirradiated, unmodified control, and modified rubber membranes (Ϸ150 m) were studied. It was found that both the permeation rate and absorption decrease progressively with increase in the TMPTA concentration up to 10% for both the surface-and bulk-modified rubbers. With increase in the radiation dose, there also is an initial drop in the values up to 50 kGy for the control and surface-modified rubbers and up to about 100 kGy for the bulk-modified one. The control rubber shows the highest absorption and permeation for all the solvents except trichloroethylene, followed by the bulk-modified rubber membrane. Trichloroethylene is, however, absorbed and permeated most by the surface-modified sample. The observations are explained in terms of the structural modifications of the rubber, crosslinking, changes in the relevant thermodynamic properties such as surface energy, the penetrant size, and the transport mechanism of the penetrants. The influence of temperature on the permeability characteristics of the control and modified rubbers was also studied.

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Sorption and diffusion of water in glass ribbon-reinforced composites

Cited by 23 publications

References 3 publications

A Fickian Diffusion Model for Permeable Fibre Polymer Composites

A Fickian Diffusion Model for Permeable Fibre Polymer Composites

Water absorption behavior of acrylonitrile‐butadiene (NBR) latex impregnated jute nonwoven fabric composites

Barrier properties of electron-beam-modified EPDM rubber

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