Anionic polymerization of isopropenyl methyl ketone, 1. IR‐spectroscopic study of the nature of alkali derivatives of acetone and of the active centres in the anionic polymerization of isopropenyl methyl ketone
作者:
Christo B. Tsvetanov,
Dobrinka T. Petrova,
Ivan M. Panayotov,
期刊:
Die Makromolekulare Chemie
(WILEY Available online 1982)
卷期:
Volume 183,
issue 3
页码: 517-529
ISSN:0025-116X
年代: 1982
DOI:10.1002/macp.1982.021830302
出版商: Hüthig&Wepf Verlag
数据来源: WILEY
摘要:
AbstractThe nature of alkali derivatives of acetone (ADA) and active centres (AC) in the anionic polymerization of isopropenyl methyl ket one (IMK) was studied by means of IR spectroscopy. Solutions of ADA and of the AC of IMK in tetrahydrofuran show a characteristic absorption at 1560 – 1610 cm−1, due to the stretching vibrations of the delocalized isopropenyl oxide group. Two kinds of equimolar complexes are formed between acetone and ADA, depending on the nature of the counterion (Li+, Na+, K+, Cs+). The same interaction is observed between the AC of oligo (IMK) and the carbonyl group of the last but one monomeric unit (penultimate effe
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