The intrinsic viscosity of polyelectrolytes revisited

✍ Scribed by Tobitani, Atsumi; Ross-Murphy, Simon B.

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 307 KB
• Volume: 44
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/(sici)1097-0126(199711)44:3<338::aid-pi867>3.0.co;2-m

✦ Synopsis

Some 25 years ago, and Haug O. & Haug, A., SmidsrÔd (SmidsrÔd, Biopolymers, 10 (1971) 1213) constructed an empirical method, the "B-valueÏ method to evaluate the charge e †ect for Ñexible and semi-Ñexible polyelectrolytes. More recently Odijk (Odijk, T., J. Polym. Sci. : Polym. Phys. Ed., 15 (1977) 477), and Skolnick and Fixman (Skolnick, J. & Fixman, M., Macromolecules, 10 (1977) 944) constructed more theoretical models for the polyelectrolyte worm-like chain. These approaches have been tested by comparison with experimental results of synthetic polymers and biopolymers, but a reexamination of the experimental data so far reported has revealed that application of the models is rather limited. The most serious problem found in both theoretical and empirical models is the salt concentration dependence of the intrinsic viscosity, where it is assumed that [g] is proportional to [ 0É5 (or sometimes [ 1) power of ionic strength. Here we re-examine models for the intrinsic viscosity of polyelectrolytes and propose a new empirical model for the electrostatic charge e †ect.