Influence of added salt on dynamic viscoelasticity of carboxymethylcellulose aqueous systems

摘要: Using three series of sodium carboxymethylcellulose (NaCMC) in the range degree substitution (the average number carboxymethyl groups/glucose unit) from 0.5 to 1.3, weight-average molecular weight Mw was determined by light scattering solution triethylenediamine cadmium hydroxide (cadoxene). It found that relation between and limiting viscosity [η] 0.1 N chloride (NaCl) aqueous can be represented Staudinger's equation. Dynamic viscoelasticity disperse systems NaCMC with various added salts measured means a cone-and-plate rheometer. If concentration salt is less than at which polymer begins out, frequency dependence curves dynamic modulus, concentrations, superposed into master curve horizontal shift only. The factor depends on kind salt.