Accession Number : AD0689109

Title :   THE ADSORPTION OF CARBON-14-LABELED STEARIC ACID ON SODA-LIME GLASS.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Patterson,R. L. , Jr. ; Lockhart,L. B. , Jr

Report Date : 23 MAY 1969

Pagination or Media Count : 17

Abstract : Procedures have been devised for producing highly compacted monomolecular layers of carbon-14-tagged stearic acid on fire-polished soft (soda-lime) glass through retraction from a nitrobenzene solution. While thermal desorption studies indicated a small quantity of weakly bonded stearic acid on the surface, its rate of removal by other mechanisms (dissolution and isotopic exchange) suggests that only a single type of bonding exists. The rate of loss of stearic acid-1-14C increased with increasing temperature, but the scatter in the data prevented the calculation of the activation energy for desorption. Difficulties in defining the surfaces under investigation rather than weaknesses in the radiochemical technique are the major handicaps in applying radiotracers to the study of surface chemical phenomena. (Author)

Descriptors :   (*STEARIC ACID, *MONOMOLECULAR FILMS), (*GLASS, SURFACE PROPERTIES), ADSORPTION, LABELED SUBSTANCES, NITROBENZENES

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE