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.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
Schmidt, H., J. Non-Cryst. Solids 73, 681 (1985).
Greiwe, K., Glaubitt, W., Amberg-Schwab, S., and Piana, K., Mat. Res. Soc. Symp. Proc. 271, 725 (1992).
Kador, L., Fischer, R., Haarer, D., Kaseman, R., Brück, S., Schmidt, H., and Dürr, H., Adv. Mater. 5, 270 (1993).
Program from D. Massiot (CRHPT, CNRS, Orléans, France)
Harris, R.K. and Kimber, B.J., Org. Magn. Res. 7, 460 (1975).
Sugahara, Y., Tanaka, Y., Sato, S., Kuroda, K., and Kato, C., Mat. Res. Soc. Symp. Proc. 271, 231 (1992).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Delattre, L., Dupuy, C. & Babonneau, F. Characterization of the hydrolysis and polymerization processes of methacryloxypropyltrimethoxysilane. J Sol-Gel Sci Technol 2, 185–188 (1994). https://doi.org/10.1007/BF00486238
Issue Date:
DOI: https://doi.org/10.1007/BF00486238