Correlation of the Henry's Law Constants for Nonpolar Liquids in Molten Polyisobutylene

Abstract

We present here a correlation for the estimation of solubilities of nonpolar solutes in molten polyisobutylene. Experimental solubility data from the literature are well described by the proposed equation ln(1/Kp) = A + B/Tr, where Kp is the Henry's law solubility constant and Tr is the reduced temperature (=T/Tc). The two correlation parameters A and B are generalized by a polynomial expansion of the acentric factor ω and the parachor [P] of the solutes. A total of 115 experimental data points, covering 18 nonpolar substances, is used to determine the proposed correlation. The mean absolute percentage error between experimental and predicted values is 4.4%. This is 2.5% lower than that achieved through use of the presently available generalized method.