Synthesis and 500 Mhz-nmr Characterization of Poly(2-trimethylsiloxy)butadiene Obtained By Free-radical and Cationic Polymerizations
(1994) European Polymer Journal — Vol. 30, n° 3, p. 295-300 (1994)
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- Abstract
- 2-(Trimethylsiloxy)butadiene was polymerized in the presence of AIBN, using different conditions of dilution and temperature. The resulting polymer was characterized by H-1- and C-13-NMR: in particular, DEPT and H-1-C-13 correlation spectra allowed to assign the different microstructures with high confidence. Cis- and trans-1,4-microstructures and 3,4-microstructure were observed in all cases, but 1,2-microstructure was never detected. The evolution of microstructure ratios with temperature was found to differ from the evolution described for other 2-substituted butadienes. Molecular weights determined by GPC are low to moderate in all cases (M(n) < 10(4)) decreasing with increasing temperature. Attempts to polymerize the monomer in the presence of cationic initiators failed to give a polymer, except when SnCl4 was used.
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Citations
Penelle, J., Mayne, V., & Wynants, C. (1994). Synthesis and 500 Mhz-nmr Characterization of Poly(2-trimethylsiloxy)butadiene Obtained By Free-radical and Cationic Polymerizations. European Polymer Journal, 30(3), 295-300. https://doi.org/10.1016/0014-3057(94)90289-5 (Original work published 1994)