Journal of Sol-Gel Science and Technology

, Volume 2, Issue 1–3, pp 185–188 | Cite as

Characterization of the hydrolysis and polymerization processes of methacryloxypropyltrimethoxysilane

Code: BP18
  • Laurent Delattre
  • Carole Dupuy
  • Florence Babonneau
Article

Abstract

The sol-gel synthesis of hybrid methacrylate-silica materials using methacryloxypropyltrimethoxysilane (MPS) as precursor, has been analyzed using 1H and 29Si liquid NMR as well as 29Si and 13C MAS-NMR. Under the present experimental conditions (H2O/MPS=3; pH=2), hydrolysis of methoxy groups is fast. However, 5% of unreacted alkoxy groups are still present in the sol after 14 days aging. Condensation reactions lead mainly to cyclic or short linear species. The number of cross-linking points never exceeds 20% of the Si units, which seems to prevent the formation of a gel. Polymerization of methacrylate groups occur easily under short times of U.V. irradiation. A quantitative analysis shows about 20% of residual unreacted groups in the polymerized materials. Addition of free methylmethacrylate in the hydrolyzed sols helps in getting a fully polymerized organic network.

Keywords

hybrid materials NMR hydrolysis polymerization 

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Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • Laurent Delattre
    • 1
  • Carole Dupuy
    • 1
  • Florence Babonneau
    • 1
  1. 1.Chimie de la Matière CondenséeUniversité Pierre et Marie CurieParisFrance

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