The Dicyandiamide Cure of SP-250 Epoxy Resin Accelerated by Monuron.
Abstract
The synergistic effect of dicyandiamide and Monuron which takes place in the hardening of epoxy resins was investigated by differential scanning calorimetric analysis conducted under dynamic conditions. The cure behavior was illustrated by the examination of three distinct systems: SP-250 epoxy resin + dicyandiamide (Dicy), resin + Dicy/Monuron, and resin + Monuron. The activation energies of these systems were found to be 39, 22, and 19 kcal/mole, respectively. The by-product of the resin + Monuron reaction is dimethylamine and it was found that this amine is able to enhance the reactivity of dicyandiamide dramatically. Mixtures pertinent to the SP-250 formulation were examined and the interpretation of the thermal data afforded certain speculations. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1983
- Accession Number
- ADA129667
Entities
People
- Bernard R. Laliberte
- Robert E. Sacher
Organizations
- United States Army Research Laboratory