Structure of Sodium Carboxymethyl Cellulose Aqueous Solutions: A SANS and Rheology Study.

ABSTRACT: We report a small angle neutron scattering (SANS) and rheology study of cellulose derivative polyelectrolyte sodium carboxymethyl cellulose with a degree of substitution of 1.2. Using SANS, we establish that this polymer is molecularly dissolved in water with a locally stiff conformation with a stretching parameter[Formula: see text]. We determine the cross sectional radius of the chain ([Formula: see text] 3.4 Å) and the scaling of the correlation length with concentration (ξ = 296 c^-1/2Å for c in g/L) is found to remain unchanged from the semidilute to concentrated crossover as identified by rheology. Viscosity measurements are found to be in qualitative agreement with scaling theory predictions for flexible polyelectrolytes exhibiting semidilute unentangl

SUBMITTER: Lopez CG 

PROVIDER: S-EPMC4681322 | biostudies-literature | 2015 Apr

REPOSITORIES: biostudies-literature