Journal article
First- and second-approximation calculations in the relaxation function of high-sugar/polysaccharide systems
International journal of biological macromolecules, Vol.27(4), pp.301-305
2000
Handle:
https://hdl.handle.net/2376/104386
PMID: 10921857
Abstract
The distribution function of Maxwellian relaxation times (
Φ) was derived from the small- deformation dynamic properties of high-sugar/agarose, /deacylated gellan and /high-methoxy pectin mixtures. First-approximation calculations of
Φ employed the time derivative of the experimentally measured storage and viscous moduli, with the two traces converging at the theoretically predicted slope of −0.5. Second-approximation calculations were based on
Φ, as derived by the first approximation, being a simple power function of relaxation times (
τ
−
m
). The slope
m was measured at various points and used to derive correction factors for shifting the relaxation function to the second approximation. Thus, values of
Φ calculated from
G′ and
G″ were brought into satisfactory agreement, particularly in the recorded portion of the glass transition region. Once the function
Φ is accurately determined, it can be readily used for calculations of other viscoelastic properties.
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Details
- Title
- First- and second-approximation calculations in the relaxation function of high-sugar/polysaccharide systems
- Creators
- Stefan KasapisShyam S Sablani
- Publication Details
- International journal of biological macromolecules, Vol.27(4), pp.301-305
- Academic Unit
- Biological Systems Engineering, Department of
- Publisher
- Elsevier B.V
- Identifiers
- 99900546968501842
- Language
- English
- Resource Type
- Journal article