International. An investigation deals with the study of the effect of molecular weight and structures of phenalcamine healing agents on the curing, mechanical, thermal and anticorrosive properties of epoxy-based coatings.
Phenalcamines were prepared by varying the composition of formaldehyde and diamine in the formulation.
Structural characterization confirmed a successful preparation of high molecular weight phenalpathies. These were used as curing agents for air-drying and thermally curable epoxy coatings.
The effect of these phenalcamines on the curing properties of epoxy resin, as well as mechanical, chemical, thermal and dynamic thermo-mechanical properties of the resulting coatings was studied and compared with commercial phenalcamine. The anticorrosive properties of the coatings were evaluated by salt spray assay and electrochemical impedance spectroscopy. The study revealed that high molecular weight phenalcamines resulted in faster surface drying due to the rapid molecular weight accumulation. Anticorrosive performance also improved as indicated by increased modulus and electrochemical potential values.
The effect of these phenalcamines on the curing properties of epoxy resin, as well as the dynamic, mechanical, chemical, thermal and dynamic thermo-mechanical properties of the resulting coatings were studied and compared with commercial phenalcamine.
The anticorrosive properties of the coatings were evaluated by salt spray assays and electrochemical impedance spectroscopy. The study revealed that high molecular weight phenalpathies resulted in rapid surface drying, due to the rapid accumulation of molecular weight. Anticorrosive performance was also improved by the potential value of high modules and electrochemicals.
