Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Liquid to vapour-liquid, liquid-liquid to vapour-liquid-liquid, and liquid to liquid-liquid transition pressures of 789 + n-hexane + LLDPE) systems were measured using a newly constructed and verified synthetic-visual high-pressure cell and metallocene linear low-density polyethylene (LLDPE: w = 199 kg*mol , w n = 2.62, 2.56 mol% 1-hexene). New phase behaviour data are reported for: a quasibinary (n-hexane + LLDPE) system at polymer mass percentages of P P = (0.5 to 5) wt%; and quasiternary 789 = 3 wt% and polymer-free 89 + n-hexane + LLDPE) systems for mass percentages of up to 3 wt% ethylene, 20 wt% 1-butene, 100 wt% 1-hexene, 30 wt% 1-octene, and 30 wt% 1-decene. The reported data span temperatures of = (380 to 470) K and pressures of ! = (0.5 to 13) MPa. They show that (i) transition temperatures and pressures change linearly with 89 (ii) the C2 to C6 89 decrease, and the C8 to C10 89 mass fraction in the solvent; increase the transition temperatures; and (iii) ethylene has a significant antisolvency effect. The measured data are correlated and predicted successfully with the Modified Sanchez-Lacombe Equation of State.