Abstract
The polymerization of N-methylazetidine (NMA) with triethyloxonium tetrafluoroborate in dichloromethane has been studied. This polymerization is characterized by an instantaneous and quantitative initiation reaction followed by a relatively fast propagation. The existence of a termination by reaction of the growing chains with amino groups of the polymer chain was shown by kinetic and viscosity measurements. The propagation constants kp and termination constants kt at different temperatures were calculated. The enthalpies of activation for propagation and termination are respectively ΔHp≠=57 kJ mol−1, ΔHt≠=63 kJ mol−1, and the corresponding entropies of activation are ΔSp≠=−71 J mol−1 K−1 and ΔSt≠=−177 J mol−1 K−1. These results have been compared with those obtained earlier for 1,3,3-trimethylazetidine.
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Schacht, E., Bossaer, P. & Goethals, E. Cationic Polymerization of Cyclic Amines. IV. N-Methylazetidine. Polym J 9, 329–336 (1977). https://doi.org/10.1295/polymj.9.329
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DOI: https://doi.org/10.1295/polymj.9.329