On the origin of: Structural characterisation of hyperbranched polyesteramides with ESI FTMS

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.