Mass spectrometry of step-growth polymers

摘要

For at least two decades, different mass spectrometric techniques have been applied for polymer analysis, including the qualitative determination of chemical compositions, end group identification, functionality type distribution and the determination of the extent of cyclisation at each degree of polymerisation. Molecular weights exceeding 100KDa are provable by matrix-assisted laser desorption/ionisation mass spectrometry (MALDI-ToF-MS). Further, molecular weight distributions are determined by MADLI-ToF. However, there are some hints that there is a discrimination against higher molecular weight species in samples with polydispersity of more than 1.2. Furthermore, pathways for dendritic and hyper-branched polymers, supramolecular polymers and nano condensates are analysed with the help of mass spectrometry.