γ-Ray Curing of Poly(methylsilane) and Poly(methylsilane−dimethylsilane) for Improved Ceramic Yields

Poly(methylsilane) (PMS) and poly(methylsilane−dimethylsilane) copolymers (P(MS−DMS)) were synthesized by Wurtz type polycondensation reactions of methyldichlorosilane or methyldichlorosilane−dimethyldichlorosilane mixtures in toluene. The obtained polymers were sealed in Pyrex tubes under vacuum an...

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Published in:Chemistry of materials 2000-09, Vol.12 (9), p.2686-2692
Main Authors: Narisawa, Masaki, Yoshida, Takeshi, Iseki, Takashi, Katase, Yoshiro, Okamura, Kiyohito, Oka, Kunio, Dohmaru, Takaaki
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Crosslinking and degradation
Exact sciences and technology
Miscellaneous
Physicochemistry of polymers
Polymers and radiations
Technical ceramics
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cited_by cdi_FETCH-LOGICAL-a355t-e9690da4b5d35c043b54b91bc3f526ab20c523fabc17f0c2da4a10e5187adf223
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container_issue 9
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container_title Chemistry of materials
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creator Narisawa, Masaki
Yoshida, Takeshi
Iseki, Takashi
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Dohmaru, Takaaki
description Poly(methylsilane) (PMS) and poly(methylsilane−dimethylsilane) copolymers (P(MS−DMS)) were synthesized by Wurtz type polycondensation reactions of methyldichlorosilane or methyldichlorosilane−dimethyldichlorosilane mixtures in toluene. The obtained polymers were sealed in Pyrex tubes under vacuum and cured with γ-rays. Hydrogen, methane, and silane gases formed in the tubes were analyzed by GC-MS spectroscopy. IR, UV, and NMR spectra of the cured precursor suggest the formation of Si−Si cross-links with small amounts of Si−CH2−Si bridges during irradiation. Ceramic yields of the cured polymers increased as the irradiation dose increased. The pyrolysis of the precursor polymers at 1473 K yielded amorphous products with an almost stoichiometric composition. The precise C/Si ratio in the pyrolysis product depended on the starting polymer composition and the curing conditions.
doi_str_mv 10.1021/cm0002564
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source American Chemical Society:Jisc Collections:American Chemical Society Read & Publish Agreement 2022-2024 (Reading list)
subjects Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Crosslinking and degradation
Exact sciences and technology
Miscellaneous
Physicochemistry of polymers
Polymers and radiations
Technical ceramics
title γ-Ray Curing of Poly(methylsilane) and Poly(methylsilane−dimethylsilane) for Improved Ceramic Yields
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