Organic Materials

The melting and crystallization behavior of pharmaceutical active ingredients and auxiliary substances, the glass transition of treacles, the oxidation behavior of lubricants or the curing behavior of paints and adhesives are thermal effects here exemplified.


Recommended literature:

Recommended literature:

Detailed Insight Into the World of Thermal Analysis

Detailed Insight Into the World of Thermal Analysis

DSC can be used to study the degree of purity of pharmaceutical active ingredients as derived from melting behavior, the oxidation of fats and oils, or the curing of adhesives and powder paints as well as many other topics.

With TGA, information can be gathered about such topics as the denaturing of proteins, vapor pressure and solvent content of paints.

Using TMA and DMA, the coefficient of thermal expansion can be determined, and the penetration behavior and visco-elastic behavior of viscous fluids, pastes and powders can be described.

DEA can trace the flow properties of pastes and other masses, even during processing.

With LFA, the thermal diffusivity even of melts and liquids can be measured and the thermal conductivity determined.

Some Application Examples

Some Application Examples

Sublimation of an OEL Layer

Multilayered organic structures can have unusual optical and physical properties, offering new possibilities for optoelectronic devices, including e.g., organic light emitting diodes (OELDs). In organic multilayers, α-NPD is a hole transporting material. Here, the TGA measurement was carried out under a reduced pressure leading to a decrease in sublimation temperature from approx. 380°C at atmospheric pressure to 240°C under reduced pressure.

Glass Transition of Sorbitol

Sorbitol is used as a substitute for sugar in many sweets, diet products, and medications. A proportion of 5.5% water in anhydrous Sorbitol causes the glass transition to defer from -1.7°C to -25.6°C. Both samples remain completely amorphous after the rapid cool-down following the melt (which took place before the heating mentioned above). (measurement with DSC 204 F1 Phoenix®)

Oxidation Behavior of Stabilized Synthetic Oil

Oxidation behavior of a stabilized synthetic oil (sample mass 3.0 ± 0.1mg) at 2 K/min in oxygen (100 ml/min) at defined pressures. With increasing oxygen pressure, oxidation starts earlier, i.e. at a lower temperature. (measurement with DSC 204 HP Phoenix®)