Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 16, Issue 8, Pages 3586-3592Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp52868e
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Funding
- National Basic Research Program of China [2010CB731604]
- NSFC [51271160/51131002/51121061/10804093/51071138]
- NSF of Hebei Province [A2010002048)]
- Universities of Hebei Province [ZD2010113]
- Program for New Century Excellent Talents in University [NCET-09-0118]
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A quantitative evaluation of the contribution of mixing thermodynamics to glass transition is performed for a binary eutectic benzil and m-nitroaniline system. The microcalorimetric measurements of the enthalpy of mixing give small and positive values, typically similar to 200 J mol(-1) for the equimolar mixture. The composition dependence of the glass transition temperature, T-g, is found to show a large and negative deviation from the ideal mixing rule. The Gordon-Taylor and Couchman-Karasz models are subsequently applied to interpret the T-g behavior, however, only a small fraction of the deviation is explained. The analyses of the experimental results manifest quantitatively the importance of the mixing thermodynamics in the glass transition in miscible systems.
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