Thermophysical and Mechanical Properties of Polystyrene: Influence of Free Quenching

Table 2

The influence of thermal history on notched Izod impact strength.

2nd quenching T (°C)	1st quenching T (°C)
	Notched Izod impact strength (kJ · m^−²)
	Free air	Water at 20°C	Water at 0°C
0	3,114±0,620	2,895±0.694	2,294±0.632
20	2,995±0,298	3,223±1.034	2,240±0.456
30	2,053±1.048	2,694±0.418	2,185±1.092
40	2,950±0.456	3,229±0.458	2,564±0.732
60	3,1212±0.542	1,256±0.448	2,240±0.456
Annealed sample	3,332±1,132