Thermally Stimulated Discharge Current Analysis of Epoxy Resins.
Abstract
The epoxy resin system, tetraglycidyl-4,4'-diaminodiphenylmethane (TGDDM) cured with 4,4'-diaminodiphenylsulfone (DDS) has been studied. Primary emphasis has been placed on characterizing molecular relaxation processes as can be detected by Thermally Stimulated Discharge Current (TSDC) analysis. Ancillary characterization methods, including calorimetry, spectroscopy, and mechanical properties, have also been employed. It is seen that TSDC clearly reveals differences which can systematically be related to: composition (formulation), cure time, and cure temperature. At least 4 individual contributions to the molecular relaxation processes occurring in the temperature range 100-250 K have been identified, but not all such contributions are sensitive to the make-up of the resin itself. Research presented in this report gives evidence to the capabilities of our research seeking to make progress into a deeper understanding of such epoxy resin systems.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 10, 1979
- Accession Number
- ADA069123
Entities
People
- J. O. Brittain
- S. H. Carr
- T.-d. Chang
- W.-f. A. Su
Organizations
- Northwestern University