Aspen Plus Polymer Tutorial [verified]

For polymer systems, standard equations of state (like Peng-Robinson) are often insufficient for liquid-phase properties. Aspen Plus offers the property method. This utilizes the Non-Random Two-Liquid (NRTL) activity coefficient model modified for polymer solutions. It is crucial for accurately calculating phase equilibrium, especially for separation steps like devolatilization where you must separate unreacted monomer from the polymer melt.

Set the Flow Basis to Mass . Because polymers do not have a fixed molecular weight, property calculations must be performed on a mass basis rather than a molar basis. aspen plus polymer tutorial