I want to produce metal nanoparticle/polymer masterbatch using a twin screw extruder. The optimal ratio of polymer to nanoparticles is expressed based on volume percentage. To convert to weight percentage, the density of both components is needed. But the apparent density of the metal powder is 0.6 g/cm3 and the density of solid metal is 2.7 g/cm3. Which density should I use to make the compound? I would appreciate it if you could introduce a reference.

Regards

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