SEARCH Articles Figures Tables Demixing pressures in polyethylene n-pentane systems. Polymer concentration are in mass . Left Mw 16,400 Mw Mn 1.16 right Mw 108,000 Mw Mn 1.32. The 0 data correspond to the vapor pressure curve for pure n-pentane which terminates at the critical point for the solvent. . [Publishers Imprint]