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Polímeros

versão impressa ISSN 0104-1428versão On-line ISSN 1678-5169

Resumo

GUIMARAES, Pedro Ivo C.. Effect study of initiators in 2-phenyl-2-oxazoline polimerization. Polímeros [online]. 2000, vol.10, n.4, pp.224-229. ISSN 1678-5169.  https://doi.org/10.1590/S0104-14282000000400010.

2-Phenyl-2-oxazoline was polymerized using methyl iodide, methyl tosilate, etherate boron trifluorated, dimethyl, diethyl and di-sec-butyl sulphate as initiators. The main aim of this work was to study the influence of type of initiator on the initiation and propagation processes as well the reactional conditions of these polymerizations. The polymerizations results showed that the nucleophilicity of initiator and different alkyl groups present in the dialkyl sulphates affect the initiation reaction, and influence the propagation species due to the counteranion effect, derived from these initiators. The dialkyl sulphates investigated exhibited good initiator efficiency and their performances were close.

Palavras-chave : Cationic polymerization; poly(N-acyl-ethyleneimine); cationic initiators; 2-substituted-oxazolines; heterocycles.

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