Polystyrene (PS)

The specific volume of polystyrene can be measured with a dilatometer using a special cylinder as a sample holder. Before the 1st heating, the sample was aged below glass transition temperature (Tg); the 2nd heating was conducted on the same sample after controlled cooling. The volume relaxation for the 1st heating is clearly visible at the Tg, as is the change in slope at the Tg for the 2nd heating. (measurement with DIL 402 C)

Volume change of polystyrene between -180°C and 140°C measured with the DIL 402 CVolume change of polystyrene between -180°C and 140°C measured with the DIL 402 C