Modified Correlation for Low-Density Polyethylene (LDPE) Solubility in Several Organic Solvents

Abstract

A nonideal solubility equation is developed based on crystallinity and is applied to model the solid-liquid equilibrium for crystalline low-density polyethylene (LDPE) in a set of pure and blended nonpolar organic solvents experimentally at 338–379 K and atmospheric pressure. The polymer concentration ranges from 0.5 to 35 g in 100 mL solvent. Modified correlation based on the heat of fusion and the melting temperature was attained by using SSPS software based on experimental data. The ideal solubility and nonideal solubility equations were applied with two different regular methods for activity coefficient calculation, which do not correlate with the experimental data in large. The data collected from developed nonideal equation and modified correlation were found in good agreement with experimental data.