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How to get the Polymer solubilty in water by Aspen plus

How to get the Polymer solubilty in water by Aspen plus

How to get the Polymer solubilty in water by Aspen plus

Dear Master Professional members :

I tried to figure out how to use the Aspen plus to find out a simple homework question that is the solubility of PVA(polyvinyl alcohol) in water for several months, but waste a lot of time and no gain.

Could any master please help me to figure out that is any oligomer or segment required to be input in Aspen ?
I tried to input the 1,3-butanediol or 1,4-butanediol as PVA segment, and choose the PolyNrtl as thermodynamics method, but the result seems not like normal, since the viscosity in the result will not increase as temperature decrease.
Should I choose the property method for the PVA polymer system is PolyNrtl or Unifac.... ?

I really appreciate for your kindly help me in this bad situation.

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