CHARACTERIZATION OF COPOLYMERIC POLY(2-VINYLIMIDAZOLINE)

Copolymeric poly(2-vinylimidazoline), comprising the ring-closed 2-imi dazoline and ring-opened linear amide repeat units, was characterized by C-13-NMR spectroscopy. This was facilitated by the C-13-NMR analyse s of the model compound forms of the copolymer's repeat units, 2-ethyl imidazoline and N-propionylethylenediamine. Quantitative determination s were made for the percentages of ring-opened, linear amide, repeat u nits and residual ethylenediamine present in different batches of the poly(2-vinylimidazoline) copolymer. (C) 1995 John Wiley & Sons, Inc.