Phase behavior of polymer-diluent systems characterized by temperature modulated differential scanning calorimetry

Heijden van der, P.C. and Mulder, M.H.V. and Wessling, M. (2001) Phase behavior of polymer-diluent systems characterized by temperature modulated differential scanning calorimetry. Thermochimica Acta, 378 . pp. 27-34. ISSN 0040-6031

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Abstract:	The thermodynamic phase behavior of a polymer–diluent system (atactic polystyrene–1-dodecanol) forms the fundamental basis of the description of thermally-induced demixing processes. In this paper, we demonstrate that temperature modulated differential scanning calorimetry (TMDSC) can accurately detect the liquid–liquid demixing transition. This transition can be clearly observed in the modulus of the complex heat capacity signal and in the phase angle. The phase angle shift is very small during liquid–liquid demixing so liquid–liquid demixing of a polymer–diluent system takes place at time scales instantaneously in comparison with the modulation period of TMDSC. In addition, the glass transition temperature of the polymer-rich phase and the crystallization temperature of the diluent can be determined as well within the same TMDSC experiment.
Item Type:	Article
Copyright:	© 2001 Elsevier Science B.V
Faculty:	Science and Technology (TNW)
Research Group:	Membrane Science and Technology (MST)
Link to this item:	http://purl.utwente.nl/publications/36587
Official URL:	http://dx.doi.org/10.1016/S0040-6031(01)00587-1
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