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Controlled free‐radical polymerization of 2‐vinylpyridine in the presence of nitroxides

2001; Wiley; Volume: 39; Issue: 17 Linguagem: Inglês

10.1002/pola.1268

1099-0518

Ioanna Chalari, Stergios Pispas, Nikos Hadjichristidis,

Radioactive element chemistry and processing

Abstract Bulk free‐radical polymerization of 2‐vinylpyridine (2VP) in the presence of 2,2,6,6‐tetramethylpiperidine‐ N ‐oxyl (TEMPO) was studied under different conditions (temperature and presence of additives). Linear poly‐(2‐vinylpyridine) with a narrow molecular weight distribution and controllable molecular weight was prepared in the presence of acetic anhydride at 95 °C up to a conversion of 66%. At higher conversions side reactions became very important (pseudoliving polymerization). By applying this procedure, well‐defined random copolymers of 2VP with styrene or tert ‐butylmethacrylate as well as block copolymers of 2VP with styrene were synthesized. © 2001 John Wiley & Sons, Inc. J Polym Sci Part A: Polym Chem 39: 2889–2895, 2001