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  • The influence of different substitution levels of guar on the quality of viscose prints with VS monoreactive dye
    Kokol, Vanja ; Šostar-Turk, Sonja
    The basic problem of reactive printing of viscose with polysaccharide guar thickeners is the ability of the dye molecule to react with the hydroxyl groups of cellulose (binding of the dye), the ... hydrohyl groups of water (the dye hydrolyzes) or with the thickener (binding of the dye). This latter is most clearly expressed in the combination of the polysaccharide unmodified guar thickener and the bifunctional reactive dye where the bifunctional dye forms, due to the presence o two reactive groups, a bridge between the cellulose fiber and the guar thickener. The unmodified guar has a large number of free hydroxyl groups which cause crosslinking with cellulose and hinder the thickener to wash off, thus increasing the stiffness of the printed fabric. The investigation has shown that this undesired reaction with guar molecules can be partly diminished by a suitable selection of the chemically modified guar thickener or by lowering the dry substance content. In this paper the influence of nonsubstituted and differently substituted guar thickeners with monoreactive (vilylsulphone) dyes on the changes of fabric stiffness are shown.
    Vir: International journal of polymeric materials. - ISSN 0091-4037 (Vol. 47, 2000, str. 709-720)
    Vrsta gradiva - članek, sestavni del
    Leto - 2000
    Jezik - angleški
    COBISS.SI-ID - 5768214

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