Experimental investigation on the reliability of routine SEC-MALLS for the determination of absolute molecular weights in the oligomeric range
- Xie, Tao
- Penelle, Jacques
- Verraver, Marc
DOIAbstract
Absolute number-average molecular weights were carefully measured for very-low to low molecular-weight poly(diisopropyl trimethylene-1,1-dicarboxylate) polymers that had been obtained from diisopropyl cyclopropane-2,2-dicarboxylate using a living anionic ring-opening polymerization technique (degree of polymerization in the range of 11-45 and polydispersity indices <1.13). Results obtained from four different analytical techniques, including end-group analysis (H-1 NMR), vapor pressure osmometry (WO), size-exclusion chromatography coupled to a multi-angle laser light-scattering detector (SEC-MALLS), and matrix-assisted laser desorption ionization-time-of-flight mass spectrometry (MALDI-ToF), were compared and discussed. Although only crude ...
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