Dear All,


I am trying to calculate the solubility parameter for a single chain of polymer.The above expression is given in a reference(link).Could someone tell me how to calculate Es and Eb given in the equation.Es the single chain energy; Eb the energy of the same chain in periodic system; Vc the volume of the cell in cubic angstrom, C the unit conversion factor.
How do I calculate Es and Eb from the trajectory file of the dynamic run?

Thank you so much for your time and consideration.