| Titre : |
The effect of polymeric phosphate chain length on shrinkage temperature and vegetable tanning penetration |
| Type de document : |
texte imprimé |
| Auteurs : |
Elton L. Hurlow, Auteur ; David A. Boast, Auteur ; Stanley G. Shuttleworth, Auteur |
| Année de publication : |
1986 |
| Article en page(s) : |
p. 197 - 207 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
The use of linear polyphosphates as pretannages for promoting quick vegetal tanning penetration rates has proceeded without much consideration of the theoretical aspects of polyphosphate chain length mediation of penetration. Polyphosphates are available in a range of chain lengths and empirical evidence suggests those of between 5 and 15 phosphate units as most beneficial. Polyphosphates are known to increase shrinkage temperature and this is shown to occur with increasing chain length. Consideration of spatial dimensions together with experimental evidence allows a theory to be proposed accounting for polyphosphates in sufficient intermolecular crosslinking occurs to prevent acidic swelling of the fibres and a low degree of permeability results. With very large polyphosphates there is sufficient multipoint intermolecular binding to suppress swelling but the physical size of the bound polyphosphates block the access channels available for vegetable tanning penetration and hence result in slow rates of penetration. Medium chain length polyphosphates exhibit sufficient intermolecular crosslinking potential to inhibit swelling but are small enough to allow the quick passage of vegetable tanning into the interior of the hide. |
| En ligne : |
https://drive.google.com/file/d/1EMmoHcRj2-S4c-sQuBagQTZORnXXoFcM/view?usp=share [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9173 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXI (Année 1986) . - p. 197 - 207
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The effect of polymeric phosphate chain length on shrinkage temperature and vegetable tanning penetration in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXI (Année 1986)
