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Modelling the behaviour of gas bubbles in an epoxy resin: evaluating the input parameters for a diffusion model using a solubility parameter approach

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Abstract

Models based on mass diffusion theory successfully represent the growth and collapse of gas bubbles in an epoxy resin. Solution of the steady-state diffusion equations requires measurement of the diffusion coefficient and solubility of the mobile species within the resin pre-cursor. These parameters are affected by changes in temperature and/or pressure and are generally not measured as part of a processing schedule. Models have been evaluated that predict the prerequisite driving force in terms of a concentration gradient and the interaction with the processing variables from the chemistry of the resin molecule. A solubility parameter approach has been used to estimate the solubility of gas in the resin in conjunction with regular solution theory. The surface tension forces, which also play an active role in bubble stability and dynamics, have been estimated from molar attraction constants.

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Author notes

  1. J. R. Wood

    Present address: Casali Institute of Applied Chemistry, The Hebrew University, Jerusalem, Israel

Authors and Affiliations

  1. Department of Materials Science and Engineering, University of Surrey, GU2 5XH, Guildford, Surrey, UK

    J. R. Wood & M. G. Bader

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  1. J. R. Wood
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  2. M. G. Bader
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Wood, J.R., Bader, M.G. Modelling the behaviour of gas bubbles in an epoxy resin: evaluating the input parameters for a diffusion model using a solubility parameter approach. Journal of Materials Science 29, 844–850 (1994). https://doi.org/10.1007/BF00446002

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