Nitrogen solubilities in low‐density polyethylene at high temperatures and high pressures

Abstract

Abstract An apparatus for the determination of the solubility of gases in polymers at high pressure and high temperature is described. The solubilities of nitrogen in low‐density polyethylene (PE800E) at 394–450 K at pressures between 10 and 125 atm are reported. Empirical correlations are obtained which represent the Flory–Huggins interaction parameter χ, solubility coefficient K H , and activity coefficient of dissolved gas Ω 2 as functions of temperature and pressure for the above system. © 1995 John Wiley & Sons, Inc.