National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Determination of Silanol in Silicones by Quantitative FTIR.

DE82020342

Publication Date	1982
Personal Author	Griffith, G. W.
Page Count	25
Abstract	A great many two-component silicone resins depend upon the reaction of a silane-hydrogen containing (SiH) material with a silanol containing (SiOH) material. There are many methods that work quite well for the quantitation of SiH. There are probably even more methods available for SiOH determination. Unfortunately, most of them suffer from large disadvantages. This laboratory has has tried nearly every available method for silanol analysis in an effort to find a reliable one. As a result, an infrared method has been developed that is not only fast and reliable but has very vew interferences. The method involves measuring the absorbance of the non-bonded SiOH band (3685 cm-1) of very dilute solutions of the silanol in carbon tetrachloride. The analysis is performed on an FTIR spectrophotometer, and the effects of moisture and other interfering species are digitally subtracted. The choice of a suitable standard silanol proved to be one of the most difficult problems to overcome, since the absorptivity coefficient is somewhat structure dependent. The method is now being used on a routine basis. (ERA citation 07:061803)
Keywords	Silicones Silicon hydroxides Chemical analysis Spectrophotometry Spectrophotometers ERDA/360402
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	71O - Plastics 99A - Analytical Chemistry
Corporate Authors	Bendix Corp., Kansas City, MO.; Department of Energy, Washington, DC.
Supplemental Notes	Society for Applied Spectroscopy and Rocky Mountain Chromatography Group conference, Denver, CO, USA, 1 Aug 1982.
Document Type	Conference Proceedings
NTIS Issue Number	198308
Contract Number	AC04-76DP00613

Determination of Silanol in Silicones by Quantitative FTIR.

Determination of Silanol in Silicones by Quantitative FTIR.
DE82020342

Publication Date	1982
Personal Author	Griffith, G. W.
Page Count	25
Abstract	A great many two-component silicone resins depend upon the reaction of a silane-hydrogen containing (SiH) material with a silanol containing (SiOH) material. There are many methods that work quite well for the quantitation of SiH. There are probably even more methods available for SiOH determination. Unfortunately, most of them suffer from large disadvantages. This laboratory has has tried nearly every available method for silanol analysis in an effort to find a reliable one. As a result, an infrared method has been developed that is not only fast and reliable but has very vew interferences. The method involves measuring the absorbance of the non-bonded SiOH band (3685 cm-1) of very dilute solutions of the silanol in carbon tetrachloride. The analysis is performed on an FTIR spectrophotometer, and the effects of moisture and other interfering species are digitally subtracted. The choice of a suitable standard silanol proved to be one of the most difficult problems to overcome, since the absorptivity coefficient is somewhat structure dependent. The method is now being used on a routine basis. (ERA citation 07:061803)
Keywords	Silicones Silicon hydroxides Chemical analysis Spectrophotometry Spectrophotometers ERDA/360402
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	71O - Plastics 99A - Analytical Chemistry
Corporate Authors	Bendix Corp., Kansas City, MO.; Department of Energy, Washington, DC.
Supplemental Notes	Society for Applied Spectroscopy and Rocky Mountain Chromatography Group conference, Denver, CO, USA, 1 Aug 1982.
Document Type	Conference Proceedings
NTIS Issue Number	198308
Contract Number	AC04-76DP00613