Near FT-IR Spectroscopy of Epoxy Diamine Formulations (Curing and Interactions)

Abstract

In recent years NIR spectroscopy has been successfully used to study the kinetic reactions of cross-linked resins. Since the role played by hydrogen bonding strongly influences the chemical, physical and mechanical properties of polymers containing hydroxyl, urethane, amine or amide functional groups, it is not surprising that the change of hydrogen bonding: during the cure can modify the absorptivity of chemical groups under investigation (up to 10% for the NH2 combination band in a solvent amine blend) and can lead to inaccurate infrared quantitative analysis. More care should be taken in the choice of the reference band to monitor the reaction cure.