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Methylsiloxane Oligomers with Oxyalkyl Fragments in the Side Chain
Author(s) -
Mukbaniani O.,
Zaikov G.,
Tatrishvili T.,
Titvinidze G.,
Mukbaniani N.
Publication year - 2007
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200750142
Subject(s) - gel permeation chromatography , potassium hydroxide , anhydrous , side chain , chemistry , thermogravimetric analysis , polymer chemistry , activation energy , fourier transform infrared spectroscopy , oligomer , differential scanning calorimetry , infrared spectroscopy , tetrahydrofuran , nuclear chemistry , organic chemistry , polymer , chemical engineering , physics , engineering , thermodynamics , solvent
The dehydrocondensation reactions of α,ω–bis(trimethylsiloxy)methylhydridesiloxane with saturated primary n‐alcohols in the presence of anhydrous powder‐like potassium hydroxide or platinum on the carbon (Pt/C‐5%) at 1:30 ratio of initial compounds, at various temperature (40–60 °C) was carried out, and methylsiloxane oligomers with n‐alkyloxy substituted groups in the side chain were obtained. It was shown that completely dehydrocondensation of all active SiH groups do not take place. Dehydrocondensation reaction order, activation energy and rate constants were found. The synthesized oligomers were characterized by 1 H, 13 C NMR, Cosy and FTIR spectra data. Gel‐permeation chromatography, differential scanning calorimetric, thermogravimetric and wide‐angle X‐ray investigations of synthesized oligomers were carried out.