STRUCTURE RHEOLOGY OF CARBOXYMETHYL CELLULOSE (CMC) SOLUTIONS

number: 
2535
English
Degree: 
Author: 
Luay Abdel Wahab Al-Jaff
Supervisor: 
Prof. Dr. Talib B. Kashmoula
year: 
2011

Rheological study on carboxymethyl cellulose (CMC) dissolved in (6% NaOH in Water) solution was undertaken; Seven grades of carboxymethyl cellulose had been used.The Mw data were obtained by M-H equation using intrinsic viscosity data, where are obtained based on viscosity measurement.( 19,918, 45,700,76,693, 83,139, 148,800) gm/cm The values of Huggins coefficient (K3) have been obtained from plotting (ηredHvs conc.). (1.135, 0.3,3.448, 0.473, 0.059)gm/mol.The flow curves have been measured for different molecular weights with different concentrations,which lead to estimation the viscosity (η0) at shear rate zero.The concentrated region involved the determination of the network parameters (Me,A(C) ) by plotting ηoo versus Mwt in log-log scale it may lead to determine the critical molecular weight
(Mc) the transition point from particle to network region,.