Porosity in hexylene-bridged polysilsesquioxanes. Effects of monomer concentration

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

Research output: Contribution to journalConference articlepeer-review

12 Scopus citations


Hexylene-bridged polysilsesquioxanes can be prepared as mesoporous or non-porous xerogels simply by switching from basic to acidic polymerization conditions. In this study, we looked at the effect of monomer concentration on porosity of hexylene-bridged xerogels prepared under acidic and basic conditions. 1, 6-Hexylene-bridged polysilsesquioxanes were prepared by sol-gel polymerizations of 1, 6-bis(triethoxysilyl)hexane 1 with concentrations between 0.1 to 1.2 M in ethanol. Gelation times ranged from seconds for 1.2 M concentration to months for 0.2 M. The gels were processed into xerogels by an aqueous work-up and the dry gels characterized by scanning electron microscopy (SEM), solid state 13C and 29Si CP MAS NMR spectroscopy, and gas sorption porosimetry.

Original languageEnglish (US)
Pages (from-to)253-259
Number of pages7
JournalMaterials Research Society Symposium - Proceedings
StatePublished - 1995
EventProceedings of the 1994 MRS Fall Meeting - Boston, MA, USA
Duration: Nov 28 1994Nov 30 1994

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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