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The influence of monomer and polymer properties on the removal of organic vehicle from ceramic and metal moldings

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Abstract

This paper describes the effects of monomer and polymer properties on the competition between degradation of organic vehicle and transport of degradation products in ceramic moldings during pyrolysis. An experimentally tested model is studied systematically for ranges of material and process parameters characteristic of known polymers and their degradation products. The work highlights the properties having the greatest influence on the successful removal of organic vehicle from molded ceramics. The polymer properties controlling the diffusion constant are linked to the temperature dependence of viscosity of the molten suspension. Enthalpy of vaporization of the organic vehicle and the activation energy for the diffusion coefficient have a commanding influence on the critical heating rate for avoidance of defects. Preliminary guidelines emerge for the design of polymers for plastic forming of ceramic suspensions.

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Authors and Affiliations

  1. Department of Mathematics and Statistics, Brunel University, Uxbridge, UB8 3PH, Middlesex, England

    S. A. Matar & E. H. Twizell

  2. Department of Materials Technology, Brunei University, Uxbridge, UB8 3PH, Middlesex, England

    J.R.G. Evans & M. J. Edirisinghe

Authors
  1. S. A. Matar
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  2. J.R.G. Evans
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  3. M. J. Edirisinghe
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  4. E. H. Twizell
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Matar, S.A., Evans, J., Edirisinghe, M.J. et al. The influence of monomer and polymer properties on the removal of organic vehicle from ceramic and metal moldings. Journal of Materials Research 10, 2060–2072 (1995). https://doi.org/10.1557/JMR.1995.2060

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  • DOI: https://doi.org/10.1557/JMR.1995.2060

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