FLAVOR SORPTION ESTIMATION BY UNIFAC GROUP-CONTRIBUTION MODEL

The UNIQUAC functional-group activity coefficient (UNIFAC) method was used to estimate sorption of flavor-like compounds by packaging polyme rs. D-limonene and ethanol were used as the representative paver-like organic compounds. Packaging polymers used in the tests were low-densi ty polyethylene (LDPE), ethylene vinyl alcohol (EVOH), and polypropyle ne (PP). Experimental equilibrium sorption values were measured at 25, 40, 55, and 70 degrees C. The comparison between the experimental and calculated values indicate the UNIFAC model to be much more accurate in sorption predictions than the regular solution theory and the Flory -Huggins equation.