J. Phys. IV France 11 (2001) Pr10-27-Pr10-33
Phase diagram of γ-butyrolactone-dimethyl-carbonate mixturesA. Chagnes1, C. Mialkowski1, B. Carre1, D. Lemordant1, V. Agafonov1 and P. Willmann2
1 Laboratoire de Physicochimie des Interfaces et des Milieux Réactionnels, EA 2048, Université de Tours, Faculté des Sciences, Parc de Grandmont, 37200 Tours, France
2 CNES, 18 avenue E. Belin, 31055 Toulouse cedex, France
Using differential scanning calorimetry (DSC) and X-ray diffraction (XRD) at low temperatures we have determined a phase relation between γ-butyrolactone and dimethyl carbonate. Two polymorphs of γ-butyrolactone with a monotropic transformation and two polymorphs of dimethyl carbonate with an enantiotropic transformation induced by BL were observed. The diagram is characterised by an eutectic point for xDMC=0.12 and T=-57.5°C.
© EDP Sciences 2001