Synthesis and application of urea paraformaldehyde polymer as a tanning agent / N. H. El-Sayed in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 6 (11-12/2002)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 6 (11-12/2002) . - p. 240-248 Titre : Synthesis and application of urea paraformaldehyde polymer as a tanning agent Type de document : texte imprimé Auteurs : N. H. El-Sayed, Auteur ; El-Shahat H. A. Nashy, Auteur Année de publication : 2002 Article en page(s) : p. 240-248 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage Analyse sensorielle Copolymère urée formaldéhyde Copolymères -- Synthèse Cuirs et peaux -- Propriétés mécaniques Essais de résilience Essais dynamiques Evaluation visuelle Résistance à la putréfaction Tannage synthétique Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A urea paraformaldehyde polymer has been synthesized under optimum conditions, for use as a tanning agent. The characteristics and effects of this polymer as a tanning agent were investigated. The tensile strength, elongation at break, tear strength, scanning electron microscopy (SEM), shrinkage temperature, shrinkage area, putrefaction resistance and thermal gravimetric analysis (TGA) parameters were studied. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Methods - RESULTS AND DISCUSSION : Polymer synthesis - Scheme 1 : Polymer formula - Scheme 2 : Sulphited polymeric structure - 2- Mechanical Properties - 3- Scanning Electron Microscopy (SEM) - 4- Shrinkage Temperature (ST) - 5- Putrefaction resistance - 6- Thermo Gravimetric Analysis (TGA) of the treated leather - 7- Handle and appearance (Table VI) - 8- Practical Application - Scheme 3 : Application process - Table 1 : Effect of polymer percentages on mechanical properties - Table 2 : Dependence of shrinkage temperature and area on percentage of polymer used - Table 3 : Total soluble proteins of the treated leather after putrefaction - Table 4 : Free amino acids of the treated leather after putrefaction - Table 5 : TGA for raw and tanned leather by chrome and the prepared polymer - Table 6 : Visual evaluation of polymer tanned leather En ligne : https://drive.google.com/file/d/1ze4J_adSjd0DsMbNmgvAeQVkFmancavl/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39844 [article]

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