Accession Number : AD0286100

Title :   GLASS SURFACE CHEMISTRY FOR GLASS FIBER REINFORCED PLASTICS

Corporate Author : SMITH (A O) CORP MILWAUKEE WIS

Report Date : 15 OCT 1962

Pagination or Media Count : 1

Abstract : The remarkable l ng bond life (more than 95 days) of the untreated alkali-deficient gass surface was further investigated. A lightly sandblasted (roughened) glass surface lasted only seven days. The geometry changes of an air bubble near the glass surface were measured during curing of the surrounding resin. The air bubble oved to and from the glass surface on curing the resin. This movement of the air bubble was attributed to thermal expansion and shrinkage of the air and not to forces created by the curing resin. Even after curing Epon 828(CL) 16 hr at room temperature, the air bubble could move. No significant difference in wetting by water was found between degassed glass surfaces treated with 1/2 and 10% concentrations of A-1100. It was recommended that bond strength testing be discontinued. The results with two test specimen designs showed insufficient reproducibility to distinguish the changes in the glass surface. (Author)

Descriptors :   *EPOXY RESINS, *GLASS TEXTILES, *SURFACE PROPERTIES, AIR, BONDING, CHEMICAL MILLING, GEOMETRY, GLASS, LAMINATES, REINFORCING MATERIALS, SURFACE ACTIVE SUBSTANCES

Distribution Statement : APPROVED FOR PUBLIC RELEASE