Thermodynamic Interactions and Characterization of Poly (Acetyl Benzofuran Methylmethacrylate) and Poly(Acetyl Benzofuran Methylmethacrylate-Co by Invers Gas Chromatography

Abstract

In this study, the thermodynamic and physical properties of poly(acetyl benzofuran methylmethacrylate) [poly(ABM)], poly(acetyl benzofuran methylmethacrylate% 41-co-acrylonitrile) [poly(ABM% 41-co-AN)] and poly(acetyl benzofuran methylmethacrylate% 71-co-acrylonitrile) [poly(ABM% 71-co-AN)] were researched by using inverse gas chromatography. Two groups of alcohols and alkanes with different chemical natures and polarities were used to determine certain properties of [poly(ABM), poly(ABM% 41-co-AN) and poly(ABM% 71-co-AN)]-solute systems. The specific retention volume, V-g(0), glass transition temperature, Tg; adsorption enthalpy, Delta Ha; 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(infinity)(1), partial molar enthalpy of solute probes at infinite dilution, Delta H-1(infinity); and Flory-Huggins interaction parameters, chi(infinity)(12); between polymer and solvents were determined in the temperature range of 493-343 K for poly(ABM) and 473-343 K for poly(ABM% 41-coAN)-poly(ABM% 71-coAN). Also, the solubility parameters of poly(ABM), poly(ABM% 41-coAN) and poly(ABM% 71-coAN) at infinite dilution were found out by plotting the graph of [delta(2)(1) - (Delta G(1)(infinity)/V-1)] versus solubility parameters, delta(1), of the probes.