Article

Sol–gel formation of heteropolysiloxanes from diethylphosphatoethyltriethoxysilane and tetraethoxysilane

Antonio Cardenas

Laboratoire des Matériaux et Procédés membranaires, CNRS UMR 9987, ENSCM 8 rue Ecole Normale, 34053 Montpellier Cédex 1, France

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Nadine Hovnanian,

Corresponding Author

Nadine Hovnanian

Laboratoire des Matériaux et Procédés membranaires, CNRS UMR 9987, ENSCM 8 rue Ecole Normale, 34053 Montpellier Cédex 1, France

Laboratoire des Matériaux et Procédés membranaires, CNRS UMR 9987, ENSCM 8 rue Ecole Normale, 34053 Montpellier Cédex 1, France===Search for more papers by this author

Monique Smaihi,

Monique Smaihi

Laboratoire des Matériaux et Procédés membranaires, CNRS UMR 9987, ENSCM 8 rue Ecole Normale, 34053 Montpellier Cédex 1, France

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Antonio Cardenas,

Antonio Cardenas

Laboratoire des Matériaux et Procédés membranaires, CNRS UMR 9987, ENSCM 8 rue Ecole Normale, 34053 Montpellier Cédex 1, France

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Nadine Hovnanian,

Corresponding Author

Nadine Hovnanian

Laboratoire des Matériaux et Procédés membranaires, CNRS UMR 9987, ENSCM 8 rue Ecole Normale, 34053 Montpellier Cédex 1, France

Laboratoire des Matériaux et Procédés membranaires, CNRS UMR 9987, ENSCM 8 rue Ecole Normale, 34053 Montpellier Cédex 1, France===Search for more papers by this author

Monique Smaihi,

Monique Smaihi

Laboratoire des Matériaux et Procédés membranaires, CNRS UMR 9987, ENSCM 8 rue Ecole Normale, 34053 Montpellier Cédex 1, France

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First published: 20 June 1996

https://doi.org/10.1002/(SICI)1097-4628(19960620)60:12<2279::AID-APP27>3.0.CO;2-0

Citations: 24

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Abstract

Transparent monolithic gels were prepared from the cohydrolysis of diethylphosphatoethyltriethoxysilane (OC₂H₅)₂P(O)CH₂CH₂Si(OC₂H₅)₃ (SiP) and tetraethoxysilane Si(OC₂H₅)₄ (TEOS) in various ratios, under acidic conditions. The hydrolysis and initial polycondensation of SiP were studied by high-resolution ²⁹Si-NMR. Based on signal intensities, singnals due to the following oligomers were identified: R(OH)₂SiOSi(OH)(R)OSi(OH)₂, R(OH)₂SiOSi(OH)₂, R(OH)(OEt)SiOSi(OH)₂R, R(OH)(OEt)SiOSi(OH)₂R, R(OH)₂SiOSi(OH)(R)OSi(OH)₂R and [R(OH)SiO-]-₃. ²⁹Si NMR Quantitative analysis was performed on SiP–TEOS mixtures during the hydrolysis-condensation reactions and on the final gels. This provided information on the formation of the gels molecular structure. © 1996 John Wiley & Sons, Inc.

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Volume60, Issue12

20 June 1996

Pages 2279-2288

Sol–gel formation of heteropolysiloxanes from diethylphosphatoethyltriethoxysilane and tetraethoxysilane

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Sol–gel formation of heteropolysiloxanes from diethylphosphatoethyltriethoxysilane and tetraethoxysilane

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