3.2. Mechanical characterisation
Fracture behaviour is diversified between neat PP and PP/PC
30 systems. Increment of volume content of PC causes decrement
of energy at break. For the neat PP and PP/PC 10 moulded in
higher temperature causes decrement of energy at break. In
opposite way is for PP/PC 20 and PP/PC 30. Increment a melt
temperature causes increment of energy.
Figure 2 and 3 presents flexural modulus and energy at break
for all of the composites moulded by SCORIM and CIM
techniques. Based on flexural test was found that increment of Tm
in PP/PC 20 and PP/PC 30 composites causes increment of
modulus values. Reverse behaviour present neat PP and PP/PC
10, where increment of Tm parameter causes a decrement of
flexural modulus.
The differences between energy to break point and modulus
for all of the material systems are presents in Table 5. To
summarize that table can be noted that the highest values of
energy at break comes from neat PP moulded by SCORIM
technique. Increment a wt % of PC causes increment of flexural
modulus and decrement of energy at break.
It was found that the materials moulded in higher process
setu-up of SCORIM causes increment of flexural modulus value .
The increase of flexural modulus is caused by more number
oriented layers obtained in high SCORIM settings as a result of the high stress field and cooling rates imposed during the
processing stage.