Accession Number : AD0682649

Title :   CHEMICAL MODIFICATION OF THE SURFACES OF SOLID BODIES AS A METHOD OF CONTROLLING THEIR ADHESIVE PROPERTIES,

Corporate Author : PICATINNY ARSENAL DOVER N J FELTMAN RESEARCH LABS

Personal Author(s) : Koroler,A. Ya.

Report Date : NOV 1968

Pagination or Media Count : 27

Abstract : Experimental data was obtained indicating that the chemical factor plays a tremendous role in adhesion. It was found that the composition and molecular structure of the adhesive and the adherends determine the strength of the cemented joint. Past work in the synthesis of adhesives of various compositions and structures makes it now possible to solve many practical problems involved in obtaining lasting joints for various parts and assemblies used in contemporary engineering. Less developed is a second trend, namely changing the composition and structure of the surfaces of the adherends. In the case of inert polymers, for example, this approach makes it possible to obtain much stronger joints with the same adhesives. Such chemical modification of the surfaces of the adherends can also solve an 'opposite' problem when the adhesion must be reduced to the lowest possible value. For example, the treatment of silicate glass, and also quartz, with silicon-organic compounds serves to reduce sharply their adhesion activity in relation to adhesives and polymers containing active functional groups. Materials used as adherends in this investigation included metals, glasses, ceramics, plastics and rubbers. Among specific compounds tested were polytetrafluoroethylene (Ftoroplast-4), polytrifluorochloroethylene (Ftoroplast-3), fluorine-organic and silicon-organic rubbers, polyethylene, and polypropylene. (Author)

Descriptors :   (*ADHESIVES, SURFACE PROPERTIES), (*POLYMERS, ADHESIVES), MOLECULAR STRUCTURE, BONDED JOINTS, SURFACE ACTIVE SUBSTANCES, SOLUBILITY, POLYETHYLENE PLASTICS, HALOCARBON PLASTICS, FLUORINE COMPOUNDS, SILICONE PLASTICS, SILANES, ELASTOMERS, USSR, GAMMA RAYS

Subject Categories : Adhesives, Seals and Binders

Distribution Statement : APPROVED FOR PUBLIC RELEASE