AbstractThe effect of temperature, activator concentration, and polymerization time on the anionic polymerization of 2‐pyrrolidone was studied using the method of statistical planning of the experiments. Sodium tert‐butoxide or sodium dihydrido‐bis(2‐methoxyethoxy)aluminate was used as initiator; N‐acetylpyrrolidone served as activator in both cases. Results obtained with both initiation systems were presented in the form of explicit mathematical