Differential Scanning Calorimetry Basics for Epoxy Heat Flow Analysis
DSC heat flow analysis verifies epoxy cure state by quantifying reaction enthalpy, glass transition shifts, and residual crosslinking to prevent part failure.
Amidoamine
Meaning
Organic curing agents belonging to the class of amine-terminated resins provide moderate reactivity and high flexibility in epoxy systems. Formulations of amidoamine arise from the reaction of polyamines with fatty acids, yielding molecules that combine aliphatic and amide structures. This specific structure provides excellent pigment wetting and reliable adhesion to damp concrete or metal.
Curing Chemistry
Condensation of dicarboxylic acids with diethylenetriamine creates the polymer backbone. When used in industrial coatings, amidoamine interacts with epoxy groups through its terminal primary and secondary amines, establishing cross-links at room temperature. This reaction occurs at a slower pace than with straight aliphatic amines, which helps prevent premature gelling during large industrial applications.
The presence of fatty acid groups improves moisture resistance and reduces the risk of amine blush on surfaces.
Adhesive Strength
Epoxy binders cured with this agent show high shear resistance on concrete. Standard tensile tests demonstrate that amidoamine provides the toughness required to withstand structural vibrations.
Viscosity Control
Low molecular weight formulations reduce the need for volatile organic solvents. This characteristic allows industrial plants to meet strict environmental emission limits while maintaining a pumpable mixture during application. Because the fluid remains workable for several hours, crews can coat large storage vessels with minimal equipment clogging.