One-pot Synthesis of Hybrid Gel by Use of Tributylstannyl Ester of Polymeric Silicic Acid, Chlorosilane and Organic Monomer

Toshio SUGIZAKI, Masayoshi TOMONO††, Masayuki OIKAWA††, Osamu MORIYA and Toshifumi KAGEYAMA††

Department of Chemistry, National Defense Academy; Hashirimizu, Yokosuka-shi 239-8686 Japan
Lintec Co. Ltd.; Nishiki-cho, Warabi-shi 335-0005 Japan
†† Department of Industrial Chemistry, Faculty of Engineering, Kanto-Gakuin University;Mutsuura, Kanazawa-ku, Yokohama-shi 236-0032 Japan

Organic-inorganic hybrid gels were obtained efficiently by one-pot procedure from tributylstannyl ester of polymeric silicic acid (PTBS), chloro (3-methacryloyloxypropyl)dimethylsilane (1a), and common monomers such as styrene, acrylonitrile, and methyl methacrylate. In the reaction system, substitution of tributylstannyl groups of PTBS by silyl groups of 1a and copolymerization of methacryloyloxy group of 1a with a monomer proceeded simultaneously under UV irradiation at room temperature. The resulting gel should be consisted of covalently bonded three components and regarded as a nanocomposite material. The use of another chlorosilane 1b, which had cyanopropyl group, with 1a led to formation of a multifunctional hybrid gel.

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