SYNTHESIS OF ION-LIQUID MONOMERS OF N,N-DIETHYL-N- 2-HYDROXYETHYL)-N- (METHACRYLOXYALKYL) AMMONIUM-BROMIDES
The provided article is devoted to process of synthesis of new ionic-liquid monomers on the basis of methacrylic acid and differing in length of a spacer in particular to synthesis of N,N-a diethyl - (2 hydroxyethyl) - N-(metacryloxyethyl) ammonium-bromide, N, N-diethyl-N-(2 hydroxyethyl) - N-(4-metacryloxybutil) ammonium-bromide and also to synthesis of N,N-diethyl (2-hydroxyethyl-N-(5-metacryloxypentyl) ammonium-bromide. Process of synthesis of the specified ionic-liquid monomers is realized in two stages. At the first stage interaction of metacrylic acid with dibromalkyl derivatives in case in equal molar ratios of components the respective bromalkilmetakrylates are synthesized. At the second stage interaction of the received methacrylates with diethylaminoethanol synthesized the ionic liquid monomers with yield 95 - 96,4% of masses. The structure of the synthesized ionic-liquid monomers is confirmed with IR - (in Fourier spectrometer ALPHA (firm BRUKER Germany)) and NMR- (a spectrometer of the firm Bruker-400 (AFR) with a frequency 400 MHz) spectrum analyses. IR - frequencies of samples were characterized by existence of the absorption bands belong as to the stretching vibrations of C=O band of an ester fragment, so, and the absorption bands belonging to C-N band and ammonium group in a cationic fragment. In NMR spectrums of samples, signals of protons the methylene groups in the triplet form and also methylene groups of an ethyl fragment in the quartet form connected with nitrogen atom are shown. The composition of the showing ionic liquid monomers is defined by the element analysis in the device PERKIN ELMER 2400 and almost complete a coincidence of indices with calculated is revealed. The melting temperature of the synthesized ionic liquid monomers is defined on the instrument SMP-30 Melting point apparatus (Great Britain) and is established that with a growth of a length of an alkyl fragment - spacer, lowering of a melting temperature of the synthesized monomers is watched which are fluctuated with in 65-93 °C. The ionic conductivity of the synthesized monomers is probed that they are characterized by rather high ionic conductivity (2.7 • 10<sup>-3</sup> - 3.1G0<sup>-3</sup> S • sm<sup>-1</sup>) is established. The differential and thermal analysis of the received ionic liquid on a derivatograph of STAPT1600 of LINSESIS monomers was researched. The intensive of loss the weight in all researched samples is observed in case of 250-350 °C, and in case of 500 °C there is almost complete decay is established.