Accession Number : AD0638635

Title :   REACTION OF SILICA WITH TETRAETHYL ORTHOSILICATE.

Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s) : Duffy,James V.

Report Date : 28 JUL 1966

Pagination or Media Count : 18

Abstract : The reaction of tetraethyl orthosilicate with fumed silica at various temperatures was investigated. It was found that essentially no reaction occurred at 25C or 100C after short reaction periods. At 165C, the reaction proceeds with both hydrated and predried silica glass surfaces. It was shown that silanol sites on the glass do take part in a reaction which results in the formation of new siloxane bonds. These sites can be rehydrated after thermal degradation of the treated surfaces in vacuum. (Author)

Descriptors :   (*GLASS TEXTILES, FINISHES), (*SILICON COMPOUNDS, CHEMICAL REACTIONS), (*SILANES, CHEMICAL REACTIONS), COMPOSITE MATERIALS, REINFORCING MATERIALS, SILOXANES, CHEMICAL BONDS, PYROLYSIS, DIOXIDES, INFRARED SPECTRA, CHROMATOGRAPHIC ANALYSIS, SILICATES

Subject Categories : Inorganic Chemistry
      Ceramics, Refractories and Glass
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE