The reaction of sodium cyanate with wool and nylon and its effect on subsequent dyeing / David Lewis in COLORATION TECHNOLOGY, Vol. 130, N° 2 (04/2014)  

[article]  inCOLORATION TECHNOLOGY > Vol. 130, N° 2 (04/2014) . - p. 127-132 Titre : The reaction of sodium cyanate with wool and nylon and its effect on subsequent dyeing Type de document : texte imprimé Auteurs : David Lewis, Auteur ; Jamie A. Hawkes, Auteur ; Yong Lu, Auteur Année de publication : 2014 Article en page(s) : p. 127-132 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Carbamoylation Carboxylate Chimie textile Cyanate de sodium Isocyanates Laine Polyamide 66 Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : This paper describes the reaction of the simplest isocyanate, isocyanic acid, conveniently generated in situ from sodium cyanate, with nucleophilic carboxylate and amino residues in polyamide fibres. Changing the pH conditions greatly affects the outcome of these reactions: under acidic conditions the carboxylate residues are selectively carbamoylated, whereas under neutral conditions both residues are carbamoylated. Such modifications greatly change the dyeing behaviour of the treated substrates. The carboxylate carbamoylation reaction leads to the formation of amides rather than the carbamoylcarboxylate, which is a reactive intermediate. DOI : 10.1111/cote.12072 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12072 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20868 [article]

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