29Si-NMR study of hydrolysis and initial polycondensation processes of organoalkoxysilanes. II. Methyltriethoxysilane

Yoshiyuki Sugahara; Seigo Okada; Shuji Sato; Kazuyuki Kuroda; Chuzo Kato

doi:10.1016/0022-3093(94)90362-X

²⁹Si-NMR study of hydrolysis and initial polycondensation processes of organoalkoxysilanes. II. Methyltriethoxysilane

Yoshiyuki Sugahara^*, Seigo Okada, Shuji Sato, Kazuyuki Kuroda, Chuzo Kato

^*Corresponding author for this work

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

84 Citations (Scopus)

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, 1 × 10^-2. Signals due to end and middle groups of polysiloxanes formed sub-regions on the basis of the number of hydroxyl groups attached to silicon, and the sub-region for silicon possessing more hydroxyl groups was observed at a lower field. Based on signal intensities, the signals due to the dimers (Me(HO)₂SiOSi(OH)₂Me and Me(HO)₂SiOSi(OH)OEt)Me) and the trimer (Me(HO)₂SiOSiMe(HO)OSi(OH)₂Me) (MeCH₃, EtC₂H₅) were identified.

Original language	English
Pages (from-to)	21-28
Number of pages	8
Journal	Journal of Non-Crystalline Solids
Volume	167
Issue number	1-2
DOIs	https://doi.org/10.1016/0022-3093(94)90362-X
Publication status	Published - 1994 Jan

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Materials Chemistry

Access to Document

10.1016/0022-3093(94)90362-X

Cite this

@article{d80d9fe6fb9a4d9294bfd30e8294544e,

title = "29Si-NMR study of hydrolysis and initial polycondensation processes of organoalkoxysilanes. II. Methyltriethoxysilane",

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, 1 × 10-2. Signals due to end and middle groups of polysiloxanes formed sub-regions on the basis of the number of hydroxyl groups attached to silicon, and the sub-region for silicon possessing more hydroxyl groups was observed at a lower field. Based on signal intensities, the signals due to the dimers (Me(HO)2SiOSi(OH)2Me and Me(HO)2SiOSi(OH)OEt)Me) and the trimer (Me(HO)2SiOSiMe(HO)OSi(OH)2Me) (MeCH3, EtC2H5) were identified.",

author = "Yoshiyuki Sugahara and Seigo Okada and Shuji Sato and Kazuyuki Kuroda and Chuzo Kato",

year = "1994",

month = jan,

doi = "10.1016/0022-3093(94)90362-X",

language = "English",

volume = "167",

pages = "21--28",

journal = "Journal of Non-Crystalline Solids",

issn = "0022-3093",

publisher = "Elsevier",

number = "1-2",

}

TY - JOUR

T1 - 29Si-NMR study of hydrolysis and initial polycondensation processes of organoalkoxysilanes. II. Methyltriethoxysilane

AU - Sugahara, Yoshiyuki

AU - Okada, Seigo

AU - Sato, Shuji

AU - Kuroda, Kazuyuki

AU - Kato, Chuzo

PY - 1994/1

Y1 - 1994/1

N2 - 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, 1 × 10-2. Signals due to end and middle groups of polysiloxanes formed sub-regions on the basis of the number of hydroxyl groups attached to silicon, and the sub-region for silicon possessing more hydroxyl groups was observed at a lower field. Based on signal intensities, the signals due to the dimers (Me(HO)2SiOSi(OH)2Me and Me(HO)2SiOSi(OH)OEt)Me) and the trimer (Me(HO)2SiOSiMe(HO)OSi(OH)2Me) (MeCH3, EtC2H5) were identified.

AB - 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, 1 × 10-2. Signals due to end and middle groups of polysiloxanes formed sub-regions on the basis of the number of hydroxyl groups attached to silicon, and the sub-region for silicon possessing more hydroxyl groups was observed at a lower field. Based on signal intensities, the signals due to the dimers (Me(HO)2SiOSi(OH)2Me and Me(HO)2SiOSi(OH)OEt)Me) and the trimer (Me(HO)2SiOSiMe(HO)OSi(OH)2Me) (MeCH3, EtC2H5) were identified.

UR - http://www.scopus.com/inward/record.url?scp=0028312607&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028312607&partnerID=8YFLogxK

U2 - 10.1016/0022-3093(94)90362-X

DO - 10.1016/0022-3093(94)90362-X

M3 - Article

AN - SCOPUS:0028312607

SN - 0022-3093

VL - 167

SP - 21

EP - 28

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

IS - 1-2

ER -

²⁹Si-NMR study of hydrolysis and initial polycondensation processes of organoalkoxysilanes. II. Methyltriethoxysilane

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this