Four hyperbranched synthetic polyesteramides were synthesized by the polycondensation of the trifunctional diisopropanolamine (D) and difunctional anhydrides (X) of succinic acid, glutaric acid, 1,2-cyclohexane dicarboxylic acid and phthalic acid. The polymers were analysed with Electrospray Ionisation Fourier Transform Ion Cyclotron Resonace Mass Spectrometry. MSn studies, on resonance excitation with Argon as collision gas, confirmed that a polymerisation terminating oligomer series was present in the reaction mixture and not a result of nozzle skimmer dissociation.

Koster, S., de Koster, C. G., Duursma, M. C., Boon, J. J., & Heeren, R. (2001). On the origin of: Structural characterisation of hyperbranched polyesteramides with ESI FTMS. In Proceedings of the 49th ASMS conference on Mass Spectrometry and Allied Topics, Chicago, Illinois, May 27-31, 2001 [published on CD-ROM only]..