Drag reduction behavior of hydrolyzed polyacrylamide ...
2017-8-28 · The specific refractive index increments (dn/dc) value of the HPAM in 0.5 mol L-1 NaCl solution, which was determined by an OPTILAB T-reX differential refrac-tometer (Wyatt Technology) at 633 nm and 25 C, was 0.162 mL/g. Viscosity averaged molecular weight of XG was measured using the method described in the literature (Sohn et al. 2001).
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