2018 (2) 1

Effect of ionic liquids on peculiarities of formation of cross-linked polycyanurate

A. Fainleib1, А. Vashchuk1,3, O. Starostenko1, O. Grigoryeva1, S. Rogalsky2, D. Grande3

1Institute of Macromolecular Chemistry NAS of Ukraine
48, Kharkivske shose, Kyiv, 02160, Ukraine
2Institut de Chimie et des Materiaux Paris-Est, UMR 7182 CNRS – Universite Paris-Est Creteil Val-de-Marne
2 rue Henri Dunant, Thiais, 94320, France
3Institute of Bioorganic Chemistry and Petrochemistry NAS of Ukraine
50, Kharkivske shose, Kyiv, 02160, Ukraine

Polym. J., 2018, 40, no. 2: 71-79

Section: Synthesis polymers.

Language: Ukrainian.

Abstract:

The kinetic peculiarities of polycyanurate formation from dicyanic ester of bisphenol E (DCBE) in the presence of 1.0 wt.% of ionic liquids (ILs) of different chemical natures have been investigated and discussed. To this purpose, three distinct ILs have been used: aprotic IL- 1-octyl-3-methylimidazolium tetrafluoroborate ([OMIm][BF4]), protic IL – 2- (hydroxyethylamino) imidazolium chloride ([HEAIm][HCl]), and protic polymeric IL – polyhexamethylene guanidine toluenesulfonate ([PHMG][TS]). Using FTIR spectroscopy, it was found that ILs catalyzed the process of DCBE polycyclotrimerization. Interestingly, [HEAIm][HCl] and [PHMG][TS] chemically incorporated into the polymer network structure, whereas [OMIm][BF4] was chemically inert towards DCBE. The maximum rate of polycyclotrimerization increased by 15%; 19% and 29% for DCBE/[PHMG][TS], DCBE/[HEAIm][HCl] and DCBE/[OMIm][BF4], respectively. On the basis of model reactions, appropriate mechanisms of formation and chemical structures of hybrid polycyanurate networks were proposed.

Keywords: polycyanurate, ionic liquid, catalytic effect.

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