Characterization of New Amphiphilic Block Copolymers of N-Vinylpyrrolidone and Vinyl Acetate, 2 - Chromatographic Separation and Analysis by MALDI-TOF and FT-IR Coupling

✍ Scribed by Nick Fandrich; Jana Falkenhagen; Steffen M. Weidner; Bastiaan Staal; Andreas F. Thünemann; André Laschewsky

• Book ID: 102939377
• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 545 KB
• Volume: 211
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.201000044

✦ Synopsis

Abstract

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.

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