Inverse gas-liquid chromatography was used with solid polymer particles in packed columns to measure polymer-solvent solubility and diffusion. Experimental results were obtained for multiple solvents in polymer beads of polyethylene and styrene-butadiene-styrene triblock copolymer (Kraton-B). The conditions were measured for solvents at infinite dilution, and experimental data are presented for binary polymer-solvent systems in a temperature range from 40° to 100°C. The data were analyzed using Binary PCIGC Regression Program developed by Davis (2003). By comparison, these results and results reported by other authors show favorable agreement within the scatter of the points.