Hydrolysis and Condensation of Hydrophilic Alkoxysilanes Under Acidic Conditions

Xiangke Shi, Daniel Graiver, Ramani Narayan

Research output: Contribution to journalArticle

  • 13 Citations

Abstract

A hydrophilic silane was obtained from the reaction of ethylene carbonate and 3-aminopropyldiethoxymethylsilane. This silane undergoes rearrangement to yield an AB 2-type hyperbranched polymer under anhydrous conditions but hydrolyzes and condenses to produce linear siloxanes under acid hydrolysis. The hydrolysis and condensation reactions as a function of time, HCl concentration and water content were studied by 29Si NMR. The compositions of the silanol containing hydrolysis intermediates and the siloxanes condensation products were identified under different conditions. The instantaneous composition was found to depend on the specific combination of the acid and the water. Under certain conditions the intermediate silane-diols were stable and did not condense even under mild acidic conditions.

LanguageEnglish (US)
Pages109-119
Number of pages11
JournalSilicon
Volume4
Issue number2
DOIs
StatePublished - Apr 2012

Profile

Silanes
Siloxanes
Condensation
Hydrolysis
Acids
Condensation reactions
Chemical analysis
Water content
Carbonates
Polymers
Ethylene
Nuclear magnetic resonance
Water

Keywords

  • 3-aminopropyldiethoxymethylsilane
  • Si NMR
  • Condensation
  • Ethylene carbonate
  • Hydrolysis
  • Hyperbranched polymers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Hydrolysis and Condensation of Hydrophilic Alkoxysilanes Under Acidic Conditions. / Shi, Xiangke; Graiver, Daniel; Narayan, Ramani.

In: Silicon, Vol. 4, No. 2, 04.2012, p. 109-119.

Research output: Contribution to journalArticle

Shi, Xiangke ; Graiver, Daniel ; Narayan, Ramani. / Hydrolysis and Condensation of Hydrophilic Alkoxysilanes Under Acidic Conditions. In: Silicon. 2012 ; Vol. 4, No. 2. pp. 109-119
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