A structural epoxy-based adhesive cured with dicyandiamide (DDA) and 4,4′ diaminodiphenylsulphone (DDS) has been aged at elevated temperatures under various gaseous environments. Weight loss was accompanied by enrichment of oxygen, sulfur, and nitrogen, near the polymeric surface, after aging in oxygen containing atmospheres, as shown by X-ray analysis. Sulfur dioxide was detected in the aging environment. Results strongly suggest chain scission by thermolysis combined with thermo-oxidative degradation occurring near the exposed surface.
No takes yet. Share an insight, caveat, or question.
Buch et al. (2000) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: