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Title: Molecular engineering with bridged polysilsesquioxanes

Abstract

Bridged polysilsesquioxanes are a class of hybrid organic-inorganic materials that permit molecular engineering of bulk properties including porosity. Prepared by sol-gel polymerization of monomers with two or more trialkoxysilyl groups, the materials are highly cross-linked amorphous polymers that are readily obtained as gels. The bridging configuration of the hydrocarbon group insures that network polymers are readily formed and that the organic functionality is homogeneously distributed throughout the polymeric scaffolding at the molecular level. This permits the bulk properties, including surface area, pore size, and dielectric constant to be engineered through the selection of the bridging organic group. Numerous bridging groups have been incorporated. This presentation will focus on the effects that the length, flexibility, and substitution geometry of the hydrocarbon bridging groups have on the properties of the resulting bridged polysilsesquioxanes. Details of the preparation, characterization, and some structure property relationships of these bridged polysilsesquioxanes will be given.

Authors:
;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
755597
Report Number(s):
SAND2000-1160C
TRN: AH200021%%44
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article
Journal Name:
Polymer Preprints/American Chemical Society National Meeting
Additional Journal Information:
Other Information: Submitted to Polymer Preprints 2000, 41(1), American Chemical Society National Meeting; PBD: 9 May 2000
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ORGANIC POLYMERS; SILOXANES; SOL-GEL PROCESS; MICROSTRUCTURE; GELATION; CROSS-LINKING; THERMODYNAMIC PROPERTIES; CORROSION RESISTANCE; PHYSICAL PROPERTIES

Citation Formats

LOY,DOUGLAS A., and SHEA,KENNETH J. Molecular engineering with bridged polysilsesquioxanes. United States: N. p., 2000. Web.
LOY,DOUGLAS A., & SHEA,KENNETH J. Molecular engineering with bridged polysilsesquioxanes. United States.
LOY,DOUGLAS A., and SHEA,KENNETH J. Tue . "Molecular engineering with bridged polysilsesquioxanes". United States. https://www.osti.gov/servlets/purl/755597.
@article{osti_755597,
title = {Molecular engineering with bridged polysilsesquioxanes},
author = {LOY,DOUGLAS A. and SHEA,KENNETH J.},
abstractNote = {Bridged polysilsesquioxanes are a class of hybrid organic-inorganic materials that permit molecular engineering of bulk properties including porosity. Prepared by sol-gel polymerization of monomers with two or more trialkoxysilyl groups, the materials are highly cross-linked amorphous polymers that are readily obtained as gels. The bridging configuration of the hydrocarbon group insures that network polymers are readily formed and that the organic functionality is homogeneously distributed throughout the polymeric scaffolding at the molecular level. This permits the bulk properties, including surface area, pore size, and dielectric constant to be engineered through the selection of the bridging organic group. Numerous bridging groups have been incorporated. This presentation will focus on the effects that the length, flexibility, and substitution geometry of the hydrocarbon bridging groups have on the properties of the resulting bridged polysilsesquioxanes. Details of the preparation, characterization, and some structure property relationships of these bridged polysilsesquioxanes will be given.},
doi = {},
journal = {Polymer Preprints/American Chemical Society National Meeting},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {5}
}