Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 29, Issue 1, Pages 53-61Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0141-8130(01)00149-0
Keywords
creep; gelatin; rheology
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This paper describes new measurements on the creep rheological behaviour of gelatin gels from both traditional mammalian and piscine sources. Measurements on a series of concentrations of gels were obtained using a high-precision controlled stress rheometer. Results for the concentration dependence of compliance are close to those expected from dynamic oscillatory measurements of gel modulus, assuming ideal elasticity. The concentration dependence of viscosity approximates power law behaviour, with eta proportional to C-similar to2 3. lower than the exponent expected for semi-dilute solutions. The apparent contradiction implied by this is discussed and a novel gel viscosity versus concentration state diagram presented. (C) 2001 Elsevier Science B.V. All rights reserved.
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