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Structure and reactivity of propagating centers in the anionic polymerization of 2‐vinylpyridine initiated by lithium derivative/triethylaluminium
Author(s) -
Hubert Philippe,
Soum Alain,
Fontanille Michel,
HogenEsch Thieo E.,
Dimov Dimo
Publication year - 1994
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19940850124
Subject(s) - reactivity (psychology) , polymerization , derivative (finance) , anionic addition polymerization , lithium (medication) , polymer chemistry , kinetics , toluene , polymer , tacticity , materials science , reaction rate constant , chemistry , organic chemistry , physics , medicine , alternative medicine , pathology , quantum mechanics , financial economics , economics , endocrinology
The polymerization of 2‐vinylpyridine initiated by an organolithium derivative in the presence of Et 3 Al in toluene solution gives a polymer with enhanced syndiotactic content. This paper is devoted to the study of the structure and reactivity of this system. Model anions were studied by UV‐visible and 13 C NMR spectroscopy. Propagation kinetics are followed by a calorimetric technique allowing the determination of the corresponding rate constants and thermodynamic parameters. These values are discussed in terms of the reaction mechanism of this polymerization.