Molecular engineering with bridged polysilsesquioxanes

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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 ... continued below

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2 p.

Creation Information

LOY,DOUGLAS A. & SHEA,KENNETH J. May 9, 2000.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

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.

Physical Description

2 p.

Notes

OSTI as DE00755597

Medium: P; Size: 2 pages

Source

  • Journal Name: Polymer Preprints/American Chemical Society National Meeting; Other Information: Submitted to Polymer Preprints 2000, 41(1), American Chemical Society National Meeting

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  • Report No.: SAND2000-1160C
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 755597
  • Archival Resource Key: ark:/67531/metadc710551

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  • May 9, 2000

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 10, 2017, 3:05 p.m.

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LOY,DOUGLAS A. & SHEA,KENNETH J. Molecular engineering with bridged polysilsesquioxanes, article, May 9, 2000; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc710551/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.