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|a (TOE)ost756100
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|a (TOE)756100
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|a TOE
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|a E 1.99:sand2000-1155c
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|a E 1.99:sand2000-1155c
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|a sand2000-1155c
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|a Porosity in polysilsesquioxane xerogels
|h [electronic resource]
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| 260 |
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|a Washington, D.C :
|b United States. Dept. of Energy ;
|a Oak Ridge, Tenn. :
|b distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
|c 2000.
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| 300 |
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|a 2 pages :
|b digital, PDF file.
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| 336 |
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|a text
|b txt
|2 rdacontent.
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| 337 |
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|a computer
|b c
|2 rdamedia.
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| 338 |
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|a online resource
|b cr
|2 rdacarrier.
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|a Published through the Information Bridge: DOE Scientific and Technical Information.
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|a 05/09/2000.
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|a "sand2000-1155c"
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|a Polymer Preprints/American Chemical Society National Meeting, San Francisco, CA (US), 03/26/2000--03/31/2000.
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|a LOY,DOUGLAS A.; RAHIMIAN,KAMYAR; BAUGHER,BRIGITTA M.; SCHNEIDER,DUANE A.
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|a Polysilsesquioxanes, [RSiO{sub 1.5}]{sub n} are a class of hybrid organic-inorganic materials in which silicon atoms are linked with up to three siloxane bonds to other monomer units in the polymer and the organic group is a pendent functionality. Polysilsesquioxanes are prepared by the hydrolysis and condensation of organotrialkoxysilanes (Scheme l). Organotrialkoxysilanes RSi(OR′)₃, have been extensively used as coupling agents for composites or surface treatments for materials. Polysilsesquioxanes have become increasingly popular for generating specialty coatings such as low k dielectric materials for microelectronic applications. While there is extensive information on the formation of polysilsesquioxanes, there has not been a survey of the ability of organotrialkoxysilanes to form gels until recently. The formation of polysilsesquioxanes gels has been shown to be very sensitive to the nature of the organic group. Many monomers will only form soluble oligomers or polymers upon hydrolysis and condensation, even when the reaction is conducted solvent-free with neat monomer and aqueous catalyst. Furthermore, there is little information concerning the influence of the organic group, R, on the porosity of the polysilsesquioxanes gels that are formed. In this paper the authors describe the preparation of polysilsesquioxane gels where R = H, methyl, ethyl, cyanoethyl, vinyl, dodecyl, hexadecyl, octadecyl, chloromethyl, and chloromethylphenyl, and the characterization of the porosity of the respective xerogels. Gels were prepared from the hydrolysis and condensation of organotrimethoxysilanes, RSi(OEt)₃, and organotriethoxy-silanes, RSi(OEt)₃
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|b AC04-94AL85000.
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|a Organic Polymers.
|2 local.
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| 650 |
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|a Dehydrocyclization.
|2 local.
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| 650 |
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|a Porosity.
|2 local.
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| 650 |
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|a Hydrolysis.
|2 local.
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| 650 |
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|a Gels.
|2 local.
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| 650 |
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|a Silanes.
|2 local.
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| 650 |
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|a Organic Silicon Compounds.
|2 local.
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| 650 |
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|a Materials Science.
|2 edbsc.
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| 710 |
2 |
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|a Sandia National Laboratories.
|4 res.
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| 710 |
1 |
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|a United States.
|b Department of Energy.
|4 spn.
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| 710 |
1 |
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|a United States.
|b Department of Energy.
|b Office of Scientific and Technical Information.
|4 dst.
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| 856 |
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|u http://www.osti.gov/servlets/purl/756100-3mnF7l/webviewable/
|z Online Access
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| 907 |
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|a .b69816852
|b 03-06-23
|c 03-31-12
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| 998 |
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|a web
|b 03-31-12
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| 952 |
f |
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|p Can circulate
|a University of Colorado Boulder
|b Online
|c Online
|d Online
|e E 1.99:sand2000-1155c
|h Superintendent of Documents classification
|i web
|n 1
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