Palladium-catalyzed hydrosilylation polymerization of dihydrosilanes with diynes affording silylene-divinylene polymers

The Pd-PCy 3 (Cy=cyclohexyl) system effectively catalyzed hydrosilylation polymerization of dihydrosilanes with p- or m-diethynylbenzene to give silylene-divinylene polymers with Ph, Me, and/or vinyl substituents at the silicon atoms. The resulting polymers showed characteristic absorption and fluor...

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Bibliographic Details
Published in:Polymer (Guilford) 2003-11, Vol.44 (23), p.7089-7093
Main Authors: Yamashita, Hiroshi, de Leon, Marites S, Channasanon, Somruethai, Suzuki, Yoshitada, Uchimaru, Yuko, Takeuchi, Kazuhiko
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Hydrosilylation
Inorganic and organomineral polymers
Palladium catalyst
Physicochemistry of polymers
Polymerization
Preparation
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Summary:The Pd-PCy 3 (Cy=cyclohexyl) system effectively catalyzed hydrosilylation polymerization of dihydrosilanes with p- or m-diethynylbenzene to give silylene-divinylene polymers with Ph, Me, and/or vinyl substituents at the silicon atoms. The resulting polymers showed characteristic absorption and fluorescence spectra in ultraviolet to visible region. p-Phenylene polymers displayed λ max peaks in longer wavelength region than the corresponding m-phenylene polymers. In TGA, the 5% weight loss temperatures (Td 5) ranged from 436 to 501 °C, indicating rather high thermal stability of these polymers. Vinyl group-containing polymers exhibited higher Td 5 values and char yields than other polymers.
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2003.09.003