Abstract
Oligomer distributions in epoxides and toughening agents typical of those used in adhesives have been investigated using matrix assisted laser desorption/ionization (MALDI) time-of-flight mass spectrometry. In the case of a typical epoxide, the technique showed the presence of a number of oligomers that have not been detected by any other means. Mean molecular weight was also higher than that found in previous analyses. For carboxy-terminated butadiene-acrylonitrile copolymers, a wide range of oligomers with masses extending up to m/z = 5000 to 6000 was resolved. Molecular weights of individual oligomers were remarkably close to the values predicted from published formulae of the compounds. However, the mean molecular weights of the oligomers were lower than values found by other methods.
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