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

In the 3-aminopropyltriethoxy silane-deuterated ethanol-H2O system, the rat e of release of ethanol from the ethoxy groups, a reaction which occurs dur ing the condensation process, has been followed by use of H-1 NMR spectrosc opy at different temperatures. Two separate reaction processes have been id entified, and values of the reaction rate constants and thermodynamic param eters (E-a, DeltaH(double dagger) and DeltaS(double dagger)) have been calc ulated. (C) 2001 Published by Elsevier Science B.V. All rights reserved.