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Characterization of New Amphiphilic Block Copolymers of N ‐Vinylpyrrolidone and Vinyl Acetate, 2 ‐ Chromatographic Separation and Analysis by MALDI‐TOF and FT‐IR Coupling
Author(s) -
Fandrich Nick,
Falkenhagen Jana,
Weidner Steffen M.,
Staal Bastiaan,
Thünemann Andreas F.,
Laschewsky André
Publication year - 2010
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201000044
Subject(s) - copolymer , chemistry , raft , chain transfer , vinyl acetate , polymer chemistry , polymerization , amphiphile , radical polymerization , solvent , reversible addition−fragmentation chain transfer polymerization , chromatography , organic chemistry , polymer
PVP‐ block ‐PVAc block copolymers were synthesized by controlled radical polymerization applying a RAFT/MADIX system and were investigated by HPLC and by coupling of chromatography to FT‐IR spectroscopy and MALDI‐TOF MS. Chromatographic methods (LACCC and gradient techniques) were developed that allowed a separation of block copolymers according to their repeating units. The results of the spectroscopic and spectrometric analysis clearly showed transfer between radicals and process solvent. With the use of hyphenated techniques differences between main and side products were detected. In agreement with previously published results, obtained by NMR, SEC, static light scattering and MALDI‐TOF MS, our data proved a non‐ideal RAFT polymerization.