Application of the extended solvation theory to study the interaction of β-CD with interpolymer of PEO and PAA

Thermodynamic study on the interaction of β-CD with poly ethylene oxide and poly acrylic acid was performed by isothermal titration calorimetry at 298K. When β-CD is added to the interpolymer complex, competition is created between host-guest and Hydrogen bond. Enthalpy of interaction between the β-CD and interpolymer complex was calculated using the extended solvation theory. P=1 shows that willingness of β- CD to interact with both polymers is identical. The positive values of δ^A Ө and δ^B Ө show that interpolymer complex is stabilized by β-CD. The process is both enthalpy and entropy-driven. The results show that this interaction is exothermic and increases the interpolymer complex stability.