2019
DOI: 10.1002/macp.201900380
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Novel Sulfur‐Containing Cross‐Linking Agent for Si‐Based Preceramic Polymers

Abstract: Cross‐linking polymethylhydrosiloxane (PMHS) with divinylthiophene (DVT) via hydrosilylation in highly dilute conditions and subsequent supercritical drying in CO2 yield a polymeric aerogel containing aromatic sulfur integrally and uniformly distributed throughout the monolith. Fourier‐transform infrared (FT‐IR) spectroscopy indicates almost complete consumption of vinyl groups and SiH bonds in the product. Both FT‐IR and Raman spectroscopic analyses support loss of conjugation of vinyl groups with the retain… Show more

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Cited by 4 publications
(1 citation statement)
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“…43 The presence of vinyl groups in TMTVS leads to a peak at 3020−3057 cm −1 and at 1408 cm −1 that are characteristic for C−H vibrations of conjugated C atoms. 44 The reduction of the Si−H and vinyl peak intensities implies a progress via hydrosilylation reactions. 34,45,46 It is clear from the reduction of such Si−H peak and from the disappearance of the vinyl bond absorptions that the addition of TMTVS and of vinyl-terminated PDMS improved the cross-linking, particularly when cross-linking is operated at a higher temperature.…”
Section: Resultsmentioning
confidence: 99%
“…43 The presence of vinyl groups in TMTVS leads to a peak at 3020−3057 cm −1 and at 1408 cm −1 that are characteristic for C−H vibrations of conjugated C atoms. 44 The reduction of the Si−H and vinyl peak intensities implies a progress via hydrosilylation reactions. 34,45,46 It is clear from the reduction of such Si−H peak and from the disappearance of the vinyl bond absorptions that the addition of TMTVS and of vinyl-terminated PDMS improved the cross-linking, particularly when cross-linking is operated at a higher temperature.…”
Section: Resultsmentioning
confidence: 99%