Characterization of oligo(acrylic acid)s and their block co-oligomers.

摘要: Abstract Oligo(acrylic acid), oligoAA are important species currently used industrially in the stabilization of paints and also for production self-assembled polymer structures which have been shown to useful applications analytical separation methods potentially drug delivery systems. To properly tailor synthesis oligoAA, its block co-oligomers synthesized by Reversible-Addition Fragmentation chain Transfer (RAFT) polymerization applications, detailed knowledge about chemical structure is needed. Commonly techniques such as Size Exclusion Chromatography (SEC) Electrospray Ionization-Mass Spectrometry (ESI-MS) suffer from poor resolution non-quantitative distributions, respectively. In this work free solution Capillary Electrophoresis (CE) has thoroughly investigated an alternative, allowing molar mass RAFT agent end group. The method was then extended acrylic acid styrene. Peak capacities up 426 were observed these 1D CE separations, 10 times greater than what achieved Liquid (LC) oligostyrenes. provide a comprehensive insight into materials 1H 13C Nuclear Magnetic Resonance (NMR) spectroscopy accurate average length reveal presence branching. at branching detected with results showing degree 1% monomer units 9 units, shortest could be detected. This suspected result both intermolecular intramolecular transfer reactions. combination NMR near complete elucidation including well group distribution. Furthermore, purity terms dead chains unreacted quantified. use demonstrated can routinely applied oligoelectrolytes their characterization allows better design produced oligomers.