This work focuses on the desolventization of polymer solutions as intermediates of a solvent-based recycling process of thermoplastics. Four polymer-solvent systems comprising polystyrene (PS) and polyethylene (PE) are investigated in two experimental setups. Low-viscos solutions are introduced to a vacuum flash evaporation. The degassing of higher-viscous polymer melts is performed by means of a stirred vacuum dryer. The mass, energy, and cost balances of the processes enable the identification of the primary influencing drivers and decisive parameters to predict the desolventization as well as its technical and economic implementation.
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This work focuses on the desolventization of polymer solutions as intermediates of a solvent-based recycling process of thermoplastics. Four polymer-solvent systems comprising polystyrene (PS) and polyethylene (PE) are investigated in two experimental setups. Low-viscos solutions are introduced to a vacuum flash evaporation. The degassing of higher-viscous polymer melts is performed by means of a stirred vacuum dryer. The mass, energy, and cost balances of the processes enable the identification...
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