Intermolecular acid-base interactions play a major role in promoting adhesion. However, such interactions are difficult to characterize as well as quantify. In this work, FTIR spectroscopy is applied to characterize possible molecular interactions of a model underfill resin system based on cycloaliphatic epoxy resin. In addition, interactions in molecules with structure corresponding to parts of epoxy resin have been studied. Peak shifts in FTIR spectra are used to determine Drago constants, which quantify the acidic and basic character of the epoxy resin. Such analyses can be used to complement and confirm flow microcalorimetry studies.
展开▼
