Polymerization process of the silane coupling agent 3-aminopropyltriethoxy silane -: 1H NMR spectra and kinetics of ethanol release

In the 3-aminopropyltriethoxy silane-deuterated ethanol-H2O system, the rate of release of ethanol from the ethoxy groups, a reaction which occurs during the condensation process, has been followed by use of H-1 NMR spectroscopy at different temperatures. Two separate reaction processes have been identified, and values of the reaction rate constants and thermodynamic parameters (E-a, DeltaH(double dagger) and DeltaS(double dagger)) have been calculated. (C) 2001 Published by Elsevier Science B.V. All rights reserved.