This paper is concerned with the radiation curing of structural adhesives which offers a number of potentially significant advantages over thermal curing techniques. Previous studies have shown that certain unsaturated polyester resins can be cured by exposure to an electron beam. The present investigation provides additional information on the utilization of electron beam irradiation for curing a structural adhesive of the vinyl ester resin type. This type of resin, produced by the reaction of acrylic monomers with bisphenol A/epichlorohydrin condensation products, is noted for having a high degree of chemical resistance and physical strength. Vinyl ester resins of various formulations were used to bond aluminum lap-shear specimens, and a cure was effected by exposure of the assemblies to electron beam radiation at ambient temperatures under contact pressure only. The short-time, high-temperature lap-shear strengths of the irradiation cured assemblies proved to be superior to those of conventionally cured specimens which were bonded with same resins catalyzed with peroxide and cured under heat/pressure. Results of a test program are included.
|Original language||English (US)|
|Number of pages||2|
|Publication status||Published - May 1978|
ASJC Scopus subject areas
- Chemical Engineering(all)