Chemical modification of functional copolymers

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Abstract

The possibility of chemical modification of thermally-stable functional copolymers of 1-vinyl-1,2,4-triazole with vinyl acetate of various compositions synthesized under conditions of free-radical polymerisation in the presence of azobisisobutyronitrile was studied. Modification of the copolymers was carried out by alkaline hydrolysis; as a result, new copolymers containing vinyl triazole and vinyl alcohol units in the macromolecules were obtained. The structure, composition, physical and chemical properties of the copolymers were determined using elemental analysis, infrared spectroscopy and thermogravimetric analysis. With an increase in the number of vinyl alcohol units in the copolymer from 25 to 87 mol %, a nearly twofold reduction in the intrinsic viscosity of the copolymers was observed. The copolymers, which exhibit dielectric properties, are characterised by electrical conductivity of the order of Ш14-10-15 S/cm. According to thermogravimetric analysis data, the copolymers are resistant to thermooxidative degradation up to 270-290 °C depending on the composition. The introduction of a vinyl alcohol fragment into the structure of copolymer macromolecules contributed to the improvement of their fibre- and film-forming properties - that is, fibres and transparent elastic films with good adhesion to various metal surfaces can be formed from solutions of modified copolymers based on 1-vinyl-1,2,4-triazole.

About the authors

G. F. Prozorova

A.E. Favorsky Irkutsk Institute of Chemistry SB RAS

Email: prozorova@irioch.irk.ru

N. P. Kuznetsova

A.E. Favorsky Irkutsk Institute of Chemistry SB RAS

Email: nkuznetsova@irioch.irk.ru

S. A. Korzhova

A.E. Favorsky Irkutsk Institute of Chemistry SB RAS

Email: korzhova@irioch.irk.ru

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