29Si-NMR study of hydrolysis and initial polycondensation processes of organoalkoxysilanes. II. Methyltriethoxysilane
作者： Yoshiyuki Sugahara , Seigo Okada , Kazuyuki Kuroda , Chuzo Kato
DOI: 10.1016/S0022-3093(05)80802-6
关键词:
摘要: Abstract The hydrolysis and initial polycondensation processes of methyltriethoxysilane (MTES) have been investigated by high-resolution 29Si-nuclear magnetic resonance spectroscopy (29Si-NMR). MTES was hydrolyzed in the system with MTES:ethyl alcohol:water:HCL = 1:4:x:y; x 1, 2, 3, 6; y 1 × 10−4, 10−2. Signals due to end middle groups polysiloxanes formed sub-regions on basis number hydroxyl attached silicon, sub-region for silicon possessing more observed at a lower field. Based signal intensities, signals dimers (Me(HO)2SiOSi(OH)2Me Me(HO)2SiOSi(OH)OEt)Me) trimer (Me(HO)2SiOSiMe(HO)OSi(OH)2Me) (MeCH3, EtC2H5) were identified.
elsevier.com
harvard.edu
sci-hub.se 参考文章(57)
C.J. Brinker, Sol-gel science San Diego, CA (USA); Academic Press Inc.. ,(1990)
Mikhail G. Voronkov, Vladimir I. Lavrent'yev, Polyhedral oligosilsesquioxanes and their homo derivatives ChemInform. ,vol. 13, pp. 199- 236 ,(1982) , 10.1007/3-540-11345-2_12
DOUGLAS A. WHITE, SUSAN M. OLEFF, JOSEPH R. FOX, Preparation of silicon carbide from organosilicon gels: II. Gel pyrolysis and SiC characterization Advanced Ceramic Materials. ,vol. 2, pp. 53- 59 ,(1987) , 10.1111/J.1551-2916.1987.TB00053.X
C.R. Kennedy, L.A. Harris, G.C. Wei, Synthesis of sinterable SiC powders by carbothermic reduction of gel-derived precursors; and pyrolysis of polycarbosilane American Ceramic Society Bulletin. ,vol. 63, pp. 1054- 1061 ,(1984)
E.A. Williams, Recent Advances in Silicon-29 NMR Spectroscopy Annual reports on NMR spectroscopy. ,vol. 15, pp. 235- 289 ,(1984) , 10.1016/S0066-4103(08)60209-4
Gérard Orcel, Larry Hench, Effect of formamide additive on the chemistry of silica sol-gels: Part I: NMR of silica hydrolysis Journal of Non-crystalline Solids. ,vol. 79, pp. 177- 194 ,(1986) , 10.1016/0022-3093(86)90045-1
Jacques Livage, Marc Henry, Clément Sanchez, Sol-gel chemistry of transition metal oxides Progress in Solid State Chemistry. ,vol. 18, pp. 259- 341 ,(1988) , 10.1016/0079-6786(88)90005-2
I. Artaki, S. Sinha, A.D. Irwin, J. Jonas, 29Si NMR study of the initial stage of the sol-gel process under high pressure Journal of Non-crystalline Solids. ,vol. 72, pp. 391- 402 ,(1985) , 10.1016/0022-3093(85)90191-7
Elizabeth A. Williams, Joseph D. Cargioli, Ronald W. Larochelle, Silicon-29 NMR. Solvent effects on chemical shifts of silanols and silylamines Journal of Organometallic Chemistry. ,vol. 108, pp. 153- 158 ,(1976) , 10.1016/S0022-328X(00)82135-X
Florence Babonneau, Kevin Thorne, J. D. Mackenzie, Dimethyldiethoxysilane/tetraethoxysilane copolymers: precursors for the silicon-carbon-oxygen system Chemistry of Materials. ,vol. 1, pp. 554- 558 ,(1989) , 10.1021/CM00005A017