Comparison of bridged polysilsesquioxane xerogels prepared from methoxy- and ethoxy-silyl monomers

Douglas A. Loy, Brigitta M. Baugher, S. Prabakar, Roger A. Assink, Kenneth J. Shea

Research output: Contribution to journalConference article

10 Scopus citations

Abstract

Hydrocarbon-bridged polysilsesquioxanes are prepared by the sol-gel polymerization of monomers with more than one trialkoxysilyl group attached directly to the bridging group by Si-C bonds. While the effects of varying the identity of the bridging group (length, rigidly, etc.), monomer concentration, and type of catalyst have been studied, the effect of different alkoxy ligands on the silicon atoms has not been investigated. For this study, 1, 6-bis(triethoxysilyl)hexane 1 and 1, 6-bis(trimethoxysilyl)hexane 2 were polymerized under acidic and basic conditions in ethanol and methanol, respectively, and in tetrahydrofuran (THF). The resulting gels were processed to afford xerogels that were characterized by SEM, solid state 13C and 29Si Cross Polarization Magic Angle Spinning (CP MAS) NMR spectroscopy, and nitrogen sorption porosimetry.

Original languageEnglish (US)
Pages (from-to)229-234
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume371
StatePublished - Jan 1 1995
Externally publishedYes
EventProceedings of the 1994 MRS Fall Meeting - Boston, MA, USA
Duration: Nov 28 1994Nov 30 1994

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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