Analysis of Physical and Thermodynamic Properties of Poly(2-Phenyl-1,3-Dioxolane-4-YI-Methyl-Methacrylate-Co-Styrene) Polymer with Inverse Gas Chromatography

摘要

In this study,physical and thermodynamic properties of poly (2-phenyl-1,3-dioxolane-4-yl-methyl-methacrylate-co-styrene) (PDMMA-ST) were investigated by using inverse gas chromatography.Two groups of solvents with different chemical natures and polarities were used to obtain information about PDMMA-ST-solvent interactions:alcohols and alkanes.The specific retention volume (V_g~0),the sorption enthalpy (DELTA H_1~S),sorption free energy (DELTA G_1~S),sorption entropy (DELTA S_1~S),the weight fraction activity coefficients of solute probes at infinite dilution (OMEGA_1~(infinity)),and Flory-Huggins interaction parameters (x_(12)~(infinity)) between polymer and solvents were determined for the interactions of PDMMA-ST with alcohols and alkanes by inverse gas chromatography in the temperature range of 333-473 K.Also,the solubility parameters of PDMMA-ST at infinite dilution were found by plotting the graph of (delta_1~2/RT) - X_(12)~(infinity)/V_1 versus solubility parameters,delta_1,of probes.