Polystyrene properties after dissolved by acetone Polystyrene plastic can be dissolved in acetone.
I would like to understand:


If the dissolved polystyrene will take-out of the acetone and becomes solid again (after all the acetone evaporates), will this solid polystyrene keep the same material properties as it was before the dissolving process?
How can I speed-up the solidification of the dissolved plastic?
What is happening is not actually the polystyrene melting but rather it dissolving in the acetone solvent. This is a physical change and not chemically altering the polymer. It should still retain its chemical properties as before.

However, other properties have changed. It is now a poorer insulator since the air pockets have been removed. It will also be more rigid for similar reasons.

The acetone ought to be able to be driven off by heating it in a ventilated space as acetone is quite volatile.