Interplay between Shear Loading and Structural Aging in a Physical Gelatin Gel
Journal Article
·
· Physical Review Letters
- INSP, UPMC Universite Paris 06, CNRS UMR 7588, 140 rue de Lourmel, 75015 Paris (France)
We show that the aging of the mechanical relaxation of a gelatin gel exhibits the same scaling phenomenology as polymer and colloidal glasses. In addition, gelatin is known to exhibit logarithmic structural aging (stiffening). We find that stress accelerates this process. However, this effect is definitely irreducible to a mere age shift with respect to natural aging. We suggest that it is interpretable in terms of elastically aided elementary (coil->helix) local events whose dynamics gradually slows down as aging increases geometric frustration.
- OSTI ID:
- 21370704
- Journal Information:
- Physical Review Letters, Vol. 103, Issue 13; Other Information: DOI: 10.1103/PhysRevLett.103.138302; (c) 2009 The American Physical Society; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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