@article{Lopez:2015:10.1002/polb.23657,
author = {Lopez, CG and Rogers, SE and Colby, RH and Graham, P and Cabral, JT},
doi = {10.1002/polb.23657},
journal = {Journal of Polymer Science Part B-Polymer Physics},
pages = {492--501},
title = {Structure of Sodium Carboxymethyl Cellulose Aqueous Solutions: A SANS and Rheology Study},
url = {http://dx.doi.org/10.1002/polb.23657},
volume = {53},
year = {2015}
}

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TY  - JOUR
AB  - 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  inline image. We determine the cross sectional radius of the chain ( inline image 3.4 Å) and the scaling of the correlation length with concentration (ξ = 296 c−12Å 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 unentangled and entangled regimes, followed by what appears to be a crossover to neutral polymer concentration dependence of viscosity at high concentrations. Yet those higher concentrations, in the concentrated regime defined by rheology, still exhibit a peak in the scattering function that indicates a correlation length that continues to scale as
AU  - Lopez,CG
AU  - Rogers,SE
AU  - Colby,RH
AU  - Graham,P
AU  - Cabral,JT
DO  - 10.1002/polb.23657
EP  - 501
PY  - 2015///
SN  - 1099-0488
SP  - 492
TI  - Structure of Sodium Carboxymethyl Cellulose Aqueous Solutions: A SANS and Rheology Study
T2  - Journal of Polymer Science Part B-Polymer Physics
UR  - http://dx.doi.org/10.1002/polb.23657
UR  - http://hdl.handle.net/10044/1/25655
VL  - 53
ER  - 

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