The equilibrium acidity of substituted N-(phenylcarbamoyl)-6-hexanelactams and disubstituted ureas and their effect on the anionic polymerization of lactams
- 1 January 1985
- journal article
- Published by Institute of Organic Chemistry & Biochemistry in Collection of Czechoslovak Chemical Communications
- Vol. 50 (4) , 840-844
- https://doi.org/10.1135/cccc19850840
Abstract
The equilibrium acidity of substituted N-(phenylcarbamoyl)-6-hexanelactams, N-butyl-N'-phenylurea and N,N'-diethylurea was determined spectrophotometrically in dimethyl sulfoxide. Using the determined pK values, the effect of activator acidity of the N-(phenylcarbamoyl)-lactam type on the anionic polymerization of lactams was estimated, and the possible effect of the individual types of urea on the concentration of lactam anions was predicted.Keywords
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