Novel polysiloxane formation process from dimethyldiethoxysilane in the presence of oxalic acid - Code: BP10

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5 Citations (Scopus)

Abstract

Polysiloxane formation in dimethyldiethoxysilane (DMDES)-ethyl alcohol (EtOH(D))-oxalic acid (OA) (DMDES:EtOH(D):OA=1:2:0.5) and DMDES-dimethylsulfoxide (DMSO)-OA (DMDES:DMSO:OA=1:2:0.5) systems was investigated by gas chromatography-mass spectrometry and 29Si-nuclear magnetic resonance. While the DMDES-EtOH(D)-OA system was homogeneous, the DMDES-DMSO-OA system consisted of two immiscible phases. In both systems, ethoxy-terminated linear oligomers ((EtO)Me2SiO(Me2SiO)nSiMe2(OEt); n=0-4, Et = C2H5, Me = CH3) and cyclic tetramer ((Me2SiO)4) were identified. The reaction mechanism for polysiloxane formation is discussed.

Original languageEnglish
Pages (from-to)153-156
Number of pages4
JournalJournal of Sol-Gel Science and Technology
Volume2
Issue number1-3
DOIs
Publication statusPublished - 1994 Jan 1

Keywords

  • dimethyldiethoxysilane
  • non-aqueous system
  • oxalic acids
  • polydimethylsiloxane
  • reaction mechanism

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Biomaterials
  • Condensed Matter Physics
  • Materials Chemistry

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