SILICONE/PLASTIC

Ok, you put the peaces on one side and the peases on the other side.

But if you cannot separate them that way, you may try another method:

Put all the pieces in a large tupperware. With a slight inclination, shake the container side to side. The silicon pieces should go to the upper part of the tupperware.

Are they different enough in diameter that you could sort them with a filter of some sort (link a pasta strainer)? Does one sink in water and the other float? If they both float, how about alcohol? If it is a small enough sample, can you just hand sort them?

I only know of one way , wed often separate siloxane or silane (silicones) by using a fluid with the approx separation density point of .9 (siloxane or silicones) from plastics. A good fluid would be pine oil . Just float the stuff in pine oil, the silicones should sink and the peases of plastic should float.

If its a lab experiment, I think you should take some out and do a specific gravity of your silicones (silicones have a variable sp gravity).

Pin oil is the universal separatory liquid in mining engineering.

The dielectric of the two substances might vary enough so that they could be separated by a current field.
Do you know that silicones have specific gravities different from most plastics>

derick - read this topic - making new, identical topics is not getting you your answer