Accession Number : ADA304673

Title :   Shelf Life Determination of Epoxy Prepregs and Film Adhesives. Revision.

Descriptive Note : Final rept.,

Corporate Author : BENDIX CORP KANSAS CITY MO KANSAS CITY DIV

Personal Author(s) : Parker, B. G.

PDF Url : ADA304673

Report Date : JAN 1979

Pagination or Media Count : 25

Abstract : Kinetic data describing the cure of a Kevlar/epoxy prepreg and an epoxy film adhesive were determined by the use of Differential Scanning Calorimetry. For the Kevlar/epoxy prepreg, a correlation was found between the heat of reaction and percent resin flow; a similar correlation was found between the heat of reaction and lap-shear strength for the film adhesive. An equation was derived for the determination of the 'B' stage time required to yield an epoxy prepreg possessing the desired flow properties. The effects of storage temperature on the shelf-life of both the prepreg and film adhesive were determined.

Descriptors :   *EPOXY RESINS, *ADHESIVES, THERMOMECHANICS, AGING(MATERIALS), REACTION KINETICS, CORRELATION, TEMPERATURE GRADIENTS, THERMAL ANALYSIS, POLYMERIC FILMS, STORAGE, CURING, PREPREGS, SHELF LIFE, SHEAR STRENGTH, CALORIMETRY, ACTIVATION ENERGY, HEAT OF REACTION.

Subject Categories : Adhesives, Seals and Binders
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE