Journal
PHYSICA B-CONDENSED MATTER
Volume 407, Issue 17, Pages 3561-3565Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physb.2012.05.024
Keywords
Glass transition; DSC; Fragility; CRR; Relaxation; Lactose
Categories
Funding
- ANRT (national association for research and technology)
- Nutriset society
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Molecular dynamics at the glass transition of three lactose/oil glassy systems have been investigated according to the cooperativity and fragility approaches. From Donth's approach, the cooperativity length is estimated by modulated temperature calorimetric measurements. Results reveal that modification of the disaccharide by oil leads to increase the disorder degree in the lactose, the size of the cooperative domains and the fragility index. These particular hydrogen-bonded organic glasses follow the general tendency observed on organic and inorganic polymers: the higher the cooperativity length, the higher the value of the fragility index at T-g. (C) 2012 Elsevier B.V. All rights reserved.
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