Abstract

VASHEGHANI FARAHANI, Bahman; HOSSEINPOUR RAJABI, Farzaneh; AHMADI, Mohammad Hoseein  and  ZENOOZ, Naser. Qualitative Investigation on some H-bonded Interpolymer Complexes by Determination of Thermodynamic Parameters. J. Mex. Chem. Soc [online]. 2012, vol.56, n.2, pp.212-216. ISSN 1870-249X.

Qualitative analysis for stability of some hydrogen bonded interpolymer complexes of poly (acrylic acid) with non ionic polymers such as poly (methacryl amide) (PMAm), poly (vinyl pyrrolidon) (PVP), poly (ethylene oxide) (PEO) and poly (ethylene glycol) (PEG), has been done by determining the stability constant (K) and thermodynamic parameters (e.g. ΔH⁰ and ΔS⁰) of these complexes at several temperatures. The comparative studies indicate considerable difference in the values of these parameters. They can be explained on the basis of influence of other interacting forces such as hydrophobic and ion dipole interactions during interpolymer complex formation. It has been found that the stability of H-bonding interpolymer complex is greatly enhanced by these two factors.

Keywords : Thermodynamic parameters; Interpolymer complex; Stability Constant; H-bonding; degree of linkage.

        · abstract in Spanish     · text in English     · English ( pdf )