Title Modification of polyamide 6 films by the copper sulfide layers using dodecathionic acid /
Translation of Title Poliamido 6 plėvelių modifikavimas vario sulfidų sluoksniais naudojant dodekationato rūgštį.
Authors Janickis, Vitalijus ; Stokienė, Rūta ; Ivanauskas, Remigijus ; Kreivėnienė, Nijolė
Full Text Download
Is Part of Chemija : mokslo darbai / Lietuvos mokslų akademija.. Vilnius : Lietuvos mokslų akademija. 2006, T. 17, nr. 4, p. 7-12.. ISSN 0235-7216
Keywords [eng] Dodecathionic acid ; Polyamide 6 ; Sorption-diffusion ; Copper sulfide layers
Abstract [eng] It is shown that the water solution of dodecathionic acid, H2S12O6, acts effectively as the sulfuration agent of polyamide 6. The study of the kinetics of sulfur sorptiondiffusion into polyamide 6 at the temperatures of 20–50 °C showed that the values of sulfur concentration obtained in polyamide 6 (up to ~7.5 mmol·cm–3) increase with the increase of the duration of treatment and the temperature of H2S12O6 solution. Copper sulfide, CuxS, layers are formed on the surface of polyamide 6 film, if the sulfured polymer is treated with a solution of Cu(II/I) salt at temperature of 78 °C: the anionic particles S12O6 2– containing sulfur atoms of low oxidation state react with the copper ions. The conditions the initial sulfuration of the polymer determine the concentration of copper and the composition of sulfide layer: the concentration of copper in the polyamide 6 film increases (up to 9.5 mmol·cm–3) with the increase of the duration and temperature of the polymer sulfuration; the stoichiometrical composition of CuxS layers on polyamide 6 formed according to the data of chemical analysis varies from ~CuS to ~Cu2S. The results of X-ray structural analysis confirmed the formation of copper sulfide layers on the surface of polyamide 6. The phase composition of layer changes depending on the conditions of the initial treatment in H2S12O6 solution too. Four copper sulfide phases, djurleite, Cu1.9375S, covelline, CuS, yarrowite, Cu1.125S, and anilite, Cu1.75S, were identified in the composition of the layers by X-ray diffraction but the maxima of the electrically conductive covelline and yarrowite phases predominate in the diffractograms of the modified polyamide 6 when this polymer was treated with the sulfuration solution during a longer period of time. [...].
Published Vilnius : Lietuvos mokslų akademija
Type Journal article
Language English
Publication date 2006