Agglomerate area ratio

Figure 7.2 Melt-mixed composites based on different polymer matrices and types of MWCNTs. Light microscopy images of thin sections, including the composition, values of the agglomerate area ratio and the thickness of the thin sections. ...

The results of the electrical resistivity and the agglomerate area ratio as a function of SME for polyamide 6 composites filled with 5 wt% Nanocyl NC7000 prepared under different melt mixing conditions are summarized in Figure 7.8. To vary the SME, different rotation speeds and mixing times were used. The lowest volume resistivity value was found at 2000 Q cm for the composites mixed at 50 rpm and 15 min corresponding to a SME of 0.5 kW h kg ... 

Figure 7.8 Electrical volume resistivity and agglomerate area ratio as a function of the SME for polyamide 6 composites containing 5 wt% NanocyF NC7000 (adapted from Krause et al. ).

J cm ). With further increasing SME values, the resistivity values significantly increase up to values in the order of 10 Q cm. The macrodispersion increases indicated by exponentially decreasing values of the agglomerate area ratio with the energy input. The reason for the increase in resistivity above a certain SME value despite a better dispersion was assumed to be CNT shortening. 

Figure 7.9 Electrical volume resistivity and agglomerate area ratio Ap as a function of SME for PC composites filled with 1 wt% Baytubes C150HP prepared at different processing conditions (adapted from Kasaliwal et aV).

Figure 7.10 Surface resistivity, agglomerate area ratio A a, and nano tube length X50 as a function of the SME for PCL composites containing 0.5 wt% Nanocyl NC7000.

PC matrix viscosity at 100 rad s, 280 °C ( without CNTs) (Pas) SME input (kWh kg- ) CNT length X value (nm) Electrical volume resistivity (Q cm) Agglomerate area ratio (%)... 

Figure 7.11 Agglomerate area ratio Ap and nanotube length X50 as a function of SME during melt extrusion of PC composites containing 3 wt% Baytubes Cl SOP.

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