Electro‐optical properties of carboxymethylcellulose. I. Concentration and ionic strength dependence | Zendy

Hanss M. | Zendy; Roux B. | Zendy; Bernengo J. C. | Zendy; Milas M. | Zendy; Rinaudo M. | Zendy

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Electro‐optical properties of carboxymethylcellulose. I. Concentration and ionic strength dependence

Author(s) -

Hanss M.,

Roux B.,

Bernengo J. C.,

Milas M.,

Rinaudo M.

Publication year - 1973

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.1973.360120805

Subject(s) - ionic strength , chemistry , polyelectrolyte , field strength , anisotropy , birefringence , kerr effect , saturation (graph theory) , polarization (electrochemistry) , optical anisotropy , molecule , ionic bonding , analytical chemistry (journal) , optics , chromatography , polymer , ion , organic chemistry , physics , mathematics , quantum mechanics , nonlinear system , combinatorics , aqueous solution , magnetic field

The experimental conditions for studying the electro‐optical properties of a natural, modified polyelectrolyte, carboxymethylcellulose ( DS 1.3; DP 180) were determined. The transient Kerr effect was found to be a function of CMC concentration, field strength, and ionic strength, I . If the concentration and I were low enough ( c < 20 mg.l −1 ), saturation was obtained for field strengths of approximately 15 kV.cm −1 . The optical anisotropy was shown to be independent of I ; the electrical anisotropy decreased sharply when I increased. These results are discussed in connection with polarization theories of polyelectrolytes. The molecular dimensions of carboxymethylcellulose, calculated from the birefringence kinetics, suggest that the molecule is a rigid rod.

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