[article]
| Titre : |
New Technique to Capture Viscoelastic Changes in Hair Induced by Mechanical Stress |
| Type de document : |
texte imprimé |
| Auteurs : |
S. B. Hornby, Auteur ; Nigel J. P Winsey, Auteur ; Stephen P. Bucknell, Auteur |
| Année de publication : |
2002 |
| Article en page(s) : |
p. 93-97 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Tags : |
'Cyclic testing' Fatigue 'Elastic modulus' Resiliency 'Tensile stress' 'Hair breakage' |
| Index. décimale : |
668.5 Parfums et cosmétiques |
| Résumé : |
In a previous article [1], we have described the mechanical fatigue behaviour of hair fibers subjected to intermitted tensile deformations using the Cyclic Tester (Dia-Stron, Ltd., Andover, UK) in order to mimic stresses encountered during grooming procedures. The instrument imparts repeated tensile load cycles to the hair and records the numbers of cycles at the break point of each hair fiber. The distributions of the number of cycles required to cause hair fiber breakage were analyzed using the Weibull distribution and the beneficial effect of certain conditioners was discussed.
The Cyclic Tester is also capable of recording load-elongation data for the hair fiber during the load cycles. In this study, we captured the load elongation data at selected load cycles of very damaged tip ends of single hair fibers and compared this data to that obtained for the undamaged root end of the same fiber using the Cyclic Tester. The changes in the hair fiber elastic and viscoelastic characteristics of very damaged and unaltered hair as a function of a number of prior deformations were compared. The instrument was enable to give a portrait of the viscoelastic changes in hair during repetitive stress. |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10651 |
in IFSCC MAGAZINE > Vol. 5, N° 2 (04-05-06/2002) . - p. 93-97
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