Hydrocarbon-bridged polysiloxane and polysilsesquioxane network materials

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:51606

Jamison, G M; Loy, D A; Assink, R A ^[1]; Shea, K J ^[2]

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1. Sandia National Labs., Albuquerque, NM (United States). Properties of Organic Materials Dept.
2. Univ. of California, Irvine, CA (United States). Dept. of Chemistry

Hexylene and phenylene-bridged polymethylsiloxane xerogels X-2 and X-4, respectively, were prepared by the sol-gel hydrolysis and condensation of 1, 6-bis(diethoxymethylsilyl)hexane 1 and 1, 4-bis(diethoxymethylsilyl)benzene 2 under acidic and basic conditions. These polymerizations afforded network polymers in the form of wet gels within several hours. The gels were processed to afford xerogels whose characteristics (determined by solid state {sup 13}C and {sup 29}Si CP MAS NMR spectroscopy and nitrogen sorption porosimetry) were compared and contrasted with those of their analogous polysilsesquioxanes. {sup 29}Si CP MAS NMR indicates a high degree of hydrolysis and polycondensation; porosimetry measurements reveal that the materials have significant surface areas, save for the acid-catalyzed hexylene gels X-2.

• Research Organization: Sandia National Laboratory
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 51606
• Report Number(s): CONF-940411--; ISBN 1-55899-246-4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMICAL REACTIONS
GELS
MOLECULAR STRUCTURE
NUCLEAR MAGNETIC RESONANCE
ORGANOMETALLIC COMPOUNDS
PORE STRUCTURE
SILICONES
SOL-GEL PROCESS
SURFACE AREA
SYNTHESIS