| Titre : |
Graft polymerization. IX. Improved distribution of grafted polymers in side leather |
| Type de document : |
texte imprimé |
| Auteurs : |
M. M. Taylor, Auteur ; Mary V. Hannigan, Auteur ; Edward H. Harris, Auteur |
| Année de publication : |
1981 |
| Article en page(s) : |
p. 245-255 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Although sheepskins and cattlehides have the same chemical composition, they differ in physical characteristics. Sheepskins are thinner than cattlehides and their structure is more open. Thus, graft polymerization techniques that were highly effective on sheepskins gave poor stratigraphic polymer distribution in cattlehides. Poor polymer distribution appeared as a sandwich effect with polymer restricted to shallow layers near each surface. Good polymer distribution more nearly resembled a fatliquored skin in that polymer was present throughout the skin, but in lesser amounts in the midcorium than at at the grain and flesh surfaces. Study of the factor affecting the rate and completeness of persulfate ion penetration into sides in the blue led to means of greatly improving the polymer distribution. The depth of penetration by persulfate ion, visually determined when starch/iodide solution was applied to cut edges of the treated chrome stock, depended upon the concentration of the persulfate ion and length of treatment. This absorbed ion was not readily extractable with water and could be used in a separate step as part of the redox couple to initiate the graft polymerization. The stratigraphic distribution of the polymer in the products was determined in stained sections examined by light microscopy. Chemical analyses were used to determine the total and bound polymer content of the grafted leathers. |
| Note de contenu : |
- INTRODUCTION : Materials - Histological methods - Chemical analysis
- RESULTS AND DISCUSSION : Absorption and distribution of persulfate - Grafting - Effect of storage on pretreated stock - Histology - finishing of grafted leathers |
| En ligne : |
https://drive.google.com/file/d/1ocaKQe-p2QVBoCDarGnXPddSmHdlsKWV/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17650 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXVI (Année 1981) . - p. 245-255
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Graft polymerization. IX. Improved distribution of grafted polymers in side leather in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXVI (Année 1981)
