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Polyelectrolyte behavior of carrageenans in aqueous solutions
Author(s) -
Rinaudo M.,
Karimian A.,
Milas M.
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.1979.360180707
Subject(s) - chemistry , counterion , aqueous solution , polyelectrolyte , potassium , limiting , ionic bonding , ionic strength , sodium , thermodynamics , inorganic chemistry , ion , organic chemistry , polymer , mechanical engineering , physics , engineering
Osmotic coefficients of sodium, potassium, and calcium counterions have been determined in aqueous solutions on kappa‐, iota‐, and lambda‐carrageenans at 25°C. The experimental results are correlated with the calculated ones from the limiting law of Manning. An orderd secondary structure exists in kappa‐ and iota‐carrageenans. Its stability is discussed as a function of temperature, ionic strength, and the nature of the counterions.