**Photo-DSC 204 F1 Phoenix® for UV curing and more**

Photo-DSC 204 F1 Phoenix® - Differential Photocalorimeter

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Paints

The irradiation for 1 s of a sample of hexandiol diacrylate (HDDA) was investigated using three different atmospheres. The heat of cross-linking is at its highest under an inert atmospehre of 100% nitrogen (green curve) with 378 J/g. A mixture of 50% nitrogen and 50% oxygen yields 268 J/g (blue curve), a pure oxygen atmoshere only 170 J/g (red curve). There is obviously a competitive reaction due to the influence of oxygen.

Dental Composites

In dental applications, light-curing dental composites are used as restoratives (fillings) or veneering materials. The materials are generally composed of methacrylate systems such as bis-glycol-dimethacrylate (bis-GMA) or urethane dimethacrylate (UDMA). Additional monomers are used as diluent or to guarantee the cross-linking abilities of the resin. Inorganic fillers up to 80 weight percent improve the mechanical properties and reduce shrinkage during cross-linking.

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DSC 200 F3 Maia®

DSC 204 F1 Phoenix®

DSC 204 HP Phoenix® - High-pressure Differntial Scanning Calorimeter

DMA 242 C