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Article Dans Une Revue Macromolecules Année : 2010

Novel Investigations on Kinetics and Polymerization Mechanism of Oxazolines Initiated by Iodine

Résumé

The cationic ring-opening polymerization of 2-methyl-2-oxazoline (MOx) using iodine initiating system was reported. Uncolored polyoxazolines were produced in spite of the use of iodine initiator, well-known dye molecule. Low molecular weight asymmetric telechelic polyoxazolines carrying an acetylimine head group and an oxazolinium end group were synthesized, with a good control over the molecular weight. NMR and MALDI-Tof experiments allowed the full determination of the chemical structures of the produced poly(2-methyl-2-oxazoline)s, notably with the acetylimine head group, explained by spontaneous α-HI elimination. Finally, to our knowledge, we reported the first detailed mechanism of cationic ring-opening polymerization of 2-methyl-2-oxazoline in acetonitrile according to UV experiments. An ionic-type mechanism was involved with the dissociation of molecular iodine to active initiating species.

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hal-00505205 , version 1 (23-07-2010)

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Guillerm Brieuc, Sophie Monge, Vincent Lapinte, Robin Jean Jacques. Novel Investigations on Kinetics and Polymerization Mechanism of Oxazolines Initiated by Iodine. Macromolecules, 2010, 43, pp.5964-5970. ⟨10.1021/ma1009808⟩. ⟨hal-00505205⟩
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