Titanium dioxide filled polyethylene

Figure 1 shows how the viscosity of low density polyethylene-containing titanium dioxide changes as a function of apparent shear rate [18]. Similar results are shown in Fig. 2 for polystyrene filled with carbon black [19]. 

Fig.1. The relationship between viscosity and shear rate for low density polyethylene filled with titanium dioxide (at 180 °C). Filler loading (vol%) (V) 0 (O) 13 (A) 22 ( ) 36 [18]...

Figure 7.5(b) Variation of extrudate swell ratio with volume fraction for high density polyethylene at 180°C filled with titanium dioxide. (Fteprinted from Ref. 7 with kind permission from John Wiley Sons, Inc.. New York, USA.)... 

One version of the microporous, filled polyethylene separator ( PowerSep ) [113], which is so successful in the lead-acid battery, is also being tested in nickel-cadmium batteries. This separator is manufactured largely in the same way and also has similar properties to those described in Section 11.2.2.1. Of course, silica cannot be used as a filler, but has to be replaced by an alkali-resistant substance, for example, titanium dioxide. The resulting separator membrane excels, with very small pore sizes and low electrical resistance as well as outstanding mechanical properties. A comprehensive presentation of the different separation materials follows in Section 11.3.5. 

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