2.4.2 Impact properties

The impact strength of PP and biocomposites was determined with an Izod Tinius Olsen impact pendulum equipped with a 4.53 N pendulum. Prior to the test, the materials were subjected to conditioning for 48 hours at 50% relative humidity and a temperature of 25°C. The specimens were made following the standard ASTM D256, and the starting angle of the test was 150° as shown in Figure 3. All the results were taken as the average value of five samples.
