Accession Number:

ADA056781

Title:

Chemistry of Silane Coupling Reactions. I. Reaction of Trimethylmethoxysilane and Triethylsilanol Studied by GLC.

Descriptive Note:

Technical rept.,

Corporate Author:

AKRON UNIV OHIO INST OF POLYMER SCIENCE

Personal Author(s):

• Dreyfuss,P.

Report Date:

1978-07-11

Pagination or Media Count:

34.0

Abstract:

The conditions under which reaction will occur and the products of reaction between trimethylmethoxysilane and a model for a glass surface, triethylsilanol, were studied by gas liquid chromatography. Reaction occurred faster and under milder conditions than anticipated. Immediately after mixing at room temperature, methanol and the unsymmetrical disiloxane, 1,1,1-triethyl-3,3,3-trimethyldisiloxane, were formed water formed soon thereafter. Simultaneously, the concentration of trimethylmethoxysilane decreased dramatically and the concentration of triethylsilanol decreased to a degree comparable to the amount of unsymmetrical disiloxane formed. The symmetrical disiloxanes were also present and their concentrations were monitored. After about two hours an apparent equilibrium was attained with the unsymmetrical disiloxane as about 60 of the product, but at very long times, 5-10 days, the reaction mixture contained more than 90 1,1,1-triethyl-3,3,3-trimethyldisiloxane. These reactions occurred readily either near or in acetone, benzene, benzene-octane, or octane as solvent. Author

Descriptors:

• *GLASS
• *SILOXANES
• *SILANES
• *ADHESIVE BONDING
• *CHROMATOGRAPHIC ANALYSIS
• LIQUID CHROMATOGRAPHY
• GAS CHROMATOGRAPHY

Subject Categories:

• Physical Chemistry
• Polymer Chemistry
• Ceramics, Refractories and Glass

Distribution Statement:

APPROVED FOR PUBLIC RELEASE