Thermophysical and Mechanical Properties of Polystyrene: Influence of Free Quenching

Table 1

The influence of thermal history on unnotched Izod impact strength.

2nd quenching T (°C)	1st quenching T (°C)
	Unnotched Izod impact strength (kJ · m^−²)
	Free air	Water at 20°C	Water at 0°C
0	6,613±0,300	7,033±1.008	6,298±0.52
20	6,256±2.262	6,281±1.906	6,141±0.70
30	6,540±1.196	6,981±0.468	5,879±0.42
40	7,161±0.95	7,978±2.586	7,664±0.574
60	6,716±0.282	5,879±0.508	6,824±1.658
Annealed sample	5.070±0.50