Summary
The following limit (ceiling) temperatures of polymerization were extrapolated from kinetic data for the anionic polymerization of 2-pyrrolidone initiated with potassium salt of 2-pyrrolidone and the initiation systems of optimum compositions: ≈ 66°C for the nonactivated polymerization, ≈ 68°C and ≈ 73°C for the polymerization accelerated with 1-(1-pyr-rolin-2-yl)-2-pyrrolidone and carbon dioxide, respectively, ≈ 73°C and ≈ 76°C for the polymerization activated with N-benzoyl-2-pyrrolidone and N-acetyl-2-pyrrolidone,respectively.
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Fries, T., Bělohlávková, J., Roda, J. et al. Polymerization of lactams. Polymer Bulletin 12, 87–91 (1984). https://doi.org/10.1007/BF00258277
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DOI: https://doi.org/10.1007/BF00258277