One-pot synthesis and sol-gel condensation of poly(alkoxysilane)S by dehydrocoupling of hydrosilanes with alcohols using group VIII metallocene catalysts

POLY 538

Hee-Gweon Woo, hgwoo@chonnam.ac.kr1, So-Yeun Kim, baha8@naver.com1, Yun-Mi Hwang, ioveyunmi@lycos.co.kr1, Myong-Shik Cho, chomshik@hanmail.net2, Jung-Il Kong, jiking@dpi.co.kr3, Byoung-Sik Pyo, pyo@bic.re.kr4, and Bo-Hye Kim, magarett@hanmail.net4. (1) Department of Chemistry, Chonnam National University, 300 Yongbong-Dong, Buk-Gu, Gwangju, 500-757, South Korea, (2) R&D Center, Kumho Tire Co, Gwangju, 506-711, South Korea, (3) R&D Center, DPI Co, Anyang, 430-803, South Korea, (4) Department of Korean Medicinal Supply, Dongshin University, Naju, 520-714, South Korea
Poly(alkoxysilane)s were prepared in high yields from the Si-Si/Si-O dehydrocoupling reactions of hydrosilanes with alcohols (1:1.5 mole ratio) in the presence of Cp2M (M = Co, Ni) catalyst. This is a mild one-pot procedure with considerable synthetic flexibility for the preparation of a wide variety of functionalized polysilanes. The poly(alkoxysilane)s were then transformed to a silicone-polysilane hybrid gel with porous lamellar structure by sol-gel reaction in the presence of water and acid (or base) catalyst (polymer:catalyst:water = 1:3.38:125). The degree of ordering and porocity of gels were characterized by XRD and BET analysis.
 

Silicones and Silicone-Modified Materials
6:00 PM-8:00 PM, Tuesday, 12 September 2006 Moscone Center -- Hall D, Poster

Division of Polymer Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006