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The influence of methacryloxypropyltrimethoxysilane on the sol-gel process of TEOS

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Abstract

The influence of MPS on the hydrolysis and condensation process of TEOS is studied by means of hydrolysis time (t H) and gelation time (t G) curves. The addition of MPS to a mixture of TEOS, ethanol and water results in a substantial increase in t G. The increase is most pronounced when adding takes place in the acid step of the sol-gel process of TEOS.

In acid environment hydrolysis of MPS will be dominant compared to hydrolysis of TEOS. This results in an effective decrease of the amount of water available for the hydrolysis of TEOS. However, this decrease in water concentration cannot explain the complete effect of the addition of MPS. The hydrolysed MPS will also be incorporated in the gel network and will strongly influence the cross-linking ability. The lesser functionality of MPS compared to TEOS and the steric hindrance of the acrylate group results in a large increase in t G.

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Authors and Affiliations

  1. Philips Research Laboratories, P.O. Box 80.000, Eindhoven, The Netherlands

    M. J. van Bommel, P. M. C. ten Wolde & T. N. M. Bernards

Authors
  1. M. J. van Bommel
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  2. P. M. C. ten Wolde
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  3. T. N. M. Bernards
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van Bommel, M.J., ten Wolde, P.M.C. & Bernards, T.N.M. The influence of methacryloxypropyltrimethoxysilane on the sol-gel process of TEOS. J Sol-Gel Sci Technol 2, 167–170 (1994). https://doi.org/10.1007/BF00486234

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  • DOI: https://doi.org/10.1007/BF00486234

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