ANALYSIS OF EPOXY-RESINS BY MATRIX-ASSISTED LASER DESORPTION IONIZATION MASS-SPECTROMETRY/

Bisphenol A-based epoxy resins were analysed by matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). The samples were s eparated into their oligomers according to the degree of polymerizatio n and the type of functional groups. Nine different functional species were found to be present in bisphenol A-epichlorohydrin resins. In th e case of resol epoxy resins, in addition to the oligomer distribution , the distribution of the methylol groups was determined. The quantita tive treatment of the spectra and the determination of the average fun ctionality and the molar mass of the samples is discussed.