Premium
Enthalpy of Mixing Glycosaminoglycans with Aqueous NaCl
Author(s) -
Cleland Robert L.
Publication year - 1979
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.1979.360181104
Subject(s) - chemistry , molality , enthalpy , thermodynamics , dilution , aqueous solution , enthalpy of mixing , mixing (physics) , polyelectrolyte , standard enthalpy of reaction , range (aeronautics) , polymer , physics , organic chemistry , materials science , quantum mechanics , composite material
Calorimetric measurements of Δ H , the enthalpy of mixing with NaCl solutions per mole of polymer charge equivalent, have been made for the sodium salts of hyaluronate, chondroitin 4‐sulfate, and chondroitin over the range m s f = 0–0.5 (where m s f is final NaCl molality); corrections were made for the enthalpy of dilution of NaCl. Values of Δ H for the range m s f = 0–0.1 agree reasonably well with a theoretical estimate from the infinite line charge theory of polyelectrolytes. In order to apply the latter, calculations of several average short‐range atomic spacings in hyaluronate were made from a statistical model with use of energy parameters which provide a good fit to experimental values of unperturbed dimensions.