Tg Comparison of Material Pocket and Bar Sample of Polystyrene

Application Note

Tg of Semisolid Material by Isothermal Frequency Sweeps in Compression

Glass transitions of semisolid material

This application note demonstrates the ability of Dynamic Mechanical Analysis (DMA) to investigate glass transitions in semisolid viscous materials using a PerkinElmer® DMA 8000. The sample chosen was honey, but the technique is suitable for all materials of this type. Instead of scanning temperature as in a conventional DMA experiment, multiple frequencies were used at three discrete temperatures. A clear relaxation is observed in both the modulus and tan d against frequency plots. This note also demonstrates the use of a little used geometry, compression, to obtain results from the sample.