Skip to main content
SpringerLink
Log in

Kinetics and mechanism of the reaction of organosiloxanes with the surface of pyrogenic silica

  • Published:
Theoretical and Experimental Chemistry Aims and scope

Abstract

Infrared spectroscopy and gravimetry were used to study chemisorption kinetics and adsorption equilibrium in the reaction of hexamethyldisiloxane (HMDS), hexamethylcyclotrisiloxane (HMTS), octamethylcyclotetrasiloxane (OMTS), and 1,3,5 trivinyl-1,3,5-trimethylcyclotrisiloxane (MVCTS) with the surface of pyrogenic silica. It was determined that the electron-donor ability of the siloxanes in the formation of hydrogen bonds with surface hydroxyl groups decreases in the series HMDS > HMTS > OMTS > MVCTS. A reaction scheme is proposed, which includes electrophilic substitution of hydrogen of the surface silanol group in the limiting stage. It was found that the chemisorption kinetics is described by an equation of an inhomogeneous-surface model with allowance for interaction between species in a neutral-field approximation. The relative reactivity of the siloxanes in these transformations is governed mainly by the difference of the energies of the reactant siloxane bonds.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

Literature cited

  1. R. Dong, X. U. Peng, and H. Guang-Leang, J. Polym. Sci.: Polym. Chem. Ed.,19, No. 12, 3069–3079 (1981).

    Google Scholar 

  2. M. G. Voronkov, V. P. Mileshkevich, and V. A. Yuzhelevskii, Silicone Bonding [in Russian], Nauka, Novosibirsk (1976).

    Google Scholar 

  3. V. P. Zhdanov, Elementary Physicochemical Processes on a Surface [in Russian], Nauka, Novosibirsk (1988).

    Google Scholar 

  4. A. V. Kiselev and V. I. Lygin, Infrared Spectra of Surface Compounds and Adsorbed Substances [in Russian], Nauka, Moscow (1972).

    Google Scholar 

  5. E. N. Gur'yanova, I. P. Gol'dshtein, and I. P. Romm, Donor-Acceptor Bonding [in Russian], Khimiya, Moscow (1973).

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institute of Surface Chemistry, Ukrainian Academy of Sciences, Kiev

    G. Ya. Guba, V. I. Bogillo & A. A. Chuiko

Authors
  1. G. Ya. Guba
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. V. I. Bogillo
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. A. A. Chuiko
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 28, No. 2, pp. 167–172, March–April, 1992.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Guba, G.Y., Bogillo, V.I. & Chuiko, A.A. Kinetics and mechanism of the reaction of organosiloxanes with the surface of pyrogenic silica. Theor Exp Chem 28, 146–150 (1993). https://doi.org/10.1007/BF00573927

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00573927

Keywords

Search

Navigation