Journal article
A fundamental approach for the estimation of the mechanical glass transition temperature in gelatin
International journal of biological macromolecules, Vol.36(1), pp.71-78
2005
Handle:
https://hdl.handle.net/2376/115317
PMID: 15878197
Abstract
The paper constitutes an attempt to overcome the empiricism prevalent in the estimation of the glass transition temperature (
T
g) of gelatin networks using rheological techniques. In doing so, it presents a study of the viscoelastic properties of a well-characterised gelatin sample covering the structural properties from the rubbery region to the glassy state. The pattern of oscillatory behaviour on shear is given by a master curve produced by shifting data obtained at different temperatures along the logarithmic time scale. Data reduction does not hold for all temperatures thus giving rise to thermorheological complexity. Within the temperature range at which molecular processes are represented by a simple distribution of relaxation times, a fundamental argument is developed to pinpoint the mechanical
T
g. This should improve confidence in measured glassy properties over the empirical indicators found in the literature. As a demonstration, the glass transition temperature of gelatin at “zero moisture” obtained using the proposed framework of analysis is contrasted with earlier attempts to identify the mechanical
T
g of gelatin solids.
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Details
- Title
- A fundamental approach for the estimation of the mechanical glass transition temperature in gelatin
- Creators
- Stefan Kasapis - Department of Chemistry, National University of Singapore, Block S3, Level 6, Science Drive 4, Singapore 117548, SingaporeShyam S Sablani - Department of Food Science and Nutrition, College of Agricultural and Marine Sciences, Sultan Qaboos University, P.O. Box 34, Al-Khod 123, Oman
- Publication Details
- International journal of biological macromolecules, Vol.36(1), pp.71-78
- Academic Unit
- Biological Systems Engineering, Department of
- Publisher
- Elsevier B.V
- Identifiers
- 99900548304101842
- Language
- English
- Resource Type
- Journal article