Analysis of Physical and Thermodynamic Properties of Poly(2-cyclopentyliden-1,3-dioxolan-4-yl-methylmethacrylate-co-styrene) (CPDMMA-ST) Polymer Using Inverse Gas Chromatography

摘要

In this study, thermodynamic and physical properties of poly(2-cyclopentyliden-1,3-dioxolane-4-yl-methylmethacrylate-co-styrene) (%55CPDMMA-%45ST) were investigated using inverse gas chromatography. Two groups of alcohols and alkanes with different chemical natures and polarities were used to determine certain properties of (CPDMMA-ST)-solute systems. The specific retention volume (V_g~0), glass transition temperature (T_g), adsorption enthalpy (△H_a), the sorption enthalpy (△H_1~S), sorption free energy (△G_1~S), sorption entropy (△S_1~S), weight fraction activity coefficients of solute probes at infinite dilution (Ω_1~∞), partial molar enthalpy of solute probes at infinite dilution (△H_1~∞) and Flory-Huggins interaction parameters (χ_(12)~∞), between polymer and solvents were determined in the temperature range of 313-473 K. In addition, the solubility parameters of CPDMMA-ST at infinite dilution was determined by plotting the graph of [δ_1~2-(△G_1~∞/V1)] versus solubility parameters (δ1), of probes.