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Synthesis and characterization of polysiloxanes with pendant bicyclic fragments
Author(s) -
Mukbaniani O.,
Tatrishvili T.,
Titvinidze G.,
Patsatsia S.
Publication year - 2010
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.33164
Subject(s) - hydrosilylation , norbornene , polymer chemistry , chemistry , platinum , catalysis , fourier transform infrared spectroscopy , tetrahydrofuran , organic chemistry , polymerization , polymer , physics , quantum mechanics , solvent
The hydrosilylation reactions of 5‐vinyl‐2‐norbornene with α,ω‐bis(trimethylsiloxy)methylhydrosiloxane catalyzed by platinum hydrochloric acid (0.1 M solution in tetrahydrofuran), Karstedt's catalyst (Pt 2 [(VinSiMe 2 ) 2 O] 3 ) and platinum on the carbon have been studied. Dependence of reaction rate and active SiH bonds' conversion depth on the catalyst was investigated. Even in the excess of the 5‐vinyl‐2‐norbornene, not all active SiH groups participate in the hydrosilylation reaction. The reaction order, activation energies, and rate constants have been determined for hydrosilylation reactions in the presence of H 2 PtCl 6 . The synthesized oligomers were characterized by Fourier transform infrared spectroscopy (FTIR), 1 H, 13 C, 1 H‐ 1 H correlation spectroscopy (COSY), and C,H‐correlation NMR spectroscopy. Synthesized polysiloxanes were characterized by wide‐angle X‐ray, gel‐permeation chromatography, and DSC analyses. Calculations using the quantum‐chemical semi‐empirical AM1 method for modeling reaction between methyldimethoxysilane [Me(MeO) 2 SiH] and 5‐vinyl‐2‐norbornene were performed to evaluate possible reaction paths. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011