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DSC and high resolution X-ray diffraction coupling

Ollivon M., Keller G., Bourgaux C., Kalnin D., Villeneuve P., Lesieur P.. 2006. Journal of Thermal Analysis and Calorimetry, 85 (1) : p. 219-224.

DOI: 10.1007/s10973-005-7351-y

Coupling of time-resolved synchrotron X-ray diffraction at both small and wide angles with differential scanning calorimetry is a new technique that allows simultaneous characterization of thermal and structural properties of a sample. The apparatus, called Microcalix, works between -30 and +230°C at scanning rates comprised between 0.01 and 20°C min-1 with a high sensitivity in both measurements using a single sample of small volume (from about 1 to 20 µL). The last version of the instrument is designed for laboratory bench and conventional source but preferably with rotating anode or multilayered mirrors. Measurements under low pressure or under shear as well as recordings of isothermal evolution are also possible. The example of the study of polymorphism of a monounsaturated triglyceride (PPO) will be presented as an application.

Mots-clés : lipide; propriété thermique; propriété physicochimique; triglycéride; technique analytique; rayon x; diffraction

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