STRUCTURAL INVESTIGATION OF EPOXY-AMINE NETWORKS BY MIDINFRARED AND NEAR-INFRARED SPECTROSCOPY

The effects of epoxy amine ratio and accelerator concentration on the chemical structure of networks based on the diglycidylether of bisphen ol A cured with 4,4'-diaminodiphenylmethane using imidazole as acceler ator were investigated. Mid-i.r. spectra of the networks give qualitat ive information about the chemical structure of the networks. From nea r-i.r. spectra the content of residual epoxy groups and the concentrat ion of different amine structures in the networks were calculated. For quantitative analysis of the primary amine concentration in the netwo rks a calibration using a model system was necessary. Therefore a mixt ure of anisole, 1-aminophenyl-3-phenoxy-propan-2-ol and aniline was us ed.