Figure 21 shows the dynamic extensional viscosity of PPNC at a strain rate of 3 1/s at 150[degrees]C, which is close to the stretching rate experienced in this experiment.
Compositions of various PPNCs are shown in Table 1.
The PPNCs used to generate foams were characterized by using the Wide Angle X-Ray scattering and TEM image analysis techniques.
Figure 2 shows WAXD scattering curves of Cloisite 20A and PPNCs.
Thermal analysis was carried out on PPNCs to determine the effect of clay on the crystallization and melting temperature range.
HMS-PP and PPNCs were foamed at different temperature within the melting range specified in the DSC results and just above it as well.
The HMS-PP and PPNCs were saturated in the autoclave under different saturation temperature and pressure, respectively.
HMS-PP and PPNCs were foamed at four different foaming conditions as shown in Table 3.
Foam structure parameters for HMS-PP and PPNCs under different foaming conditions.
Foam cell size and structure for HMS-PP and PPNCs under different foaming conditions determined from image analysis technique.