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Digitale Medien

Novel polysiloxane formation process from dimethyldiethoxysilane in the presence of oxalic acid (1994)

Chiba, J. ; Sugahara, Y. ; Kuroda, K.

Springer

Journal of sol gel science and technology 2 (1994), S. 153-156

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Details

ISSN: 1573-4846

Schlagwort(e): dimethyldiethoxysilane ; oxalic acids ; polydimethylsiloxane ; reaction mechanism ; non-aqueous system

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: 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.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00486231

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