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Study of the propagation centre in the anionic polymerization of lactams, 2 . Model study of the interaction between an activated monomer and N ‐acyllactam in dimethyl sulfoxide
Author(s) -
Kříž Jaroslav,
Stehlíček Jaroslav,
Dybal Jiří,
Hauer Jan
Publication year - 1996
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.1996.021970205
Subject(s) - counterion , chemistry , dimethyl sulfoxide , monomer , polymerization , polymer chemistry , lactam , anionic addition polymerization , mndo , photochemistry , organic chemistry , molecule , ion , polymer
Interaction of potassium 3,3‐dimethyl‐2‐piperidone with 1‐benzoyl‐3,3‐dimethyl‐2‐piperidone in DMSO as a model of the complex propagation centre in the anionic polymerization of lactams has been studied by 1 H and 13 C NMR, infrared spectroscopy, and, for the Li counterion, by MNDO calculations. The reactants were found to form a loose complex which can emerge in various geometries sharing the equivalence and relative motional freedom of both lactam moieties. Types of internal motions in the complex are suggested and their implications for the detailed idea of the propagation mechanism are discussed.