Hoyt and Fabula 



100 



POWER-LAW FITTINGS 

 x = 0.43, 0.47,0.49 



DISK TORQUE RATIO 

 N PERCENT 



M, POLYMER MOLECULAR WEIGHT (APPROXIMATE 



Fig. 5 - Dependence of required concentrations 

 for various disk torque ratios on molecular 

 weight of poly(ethylene oxide) 



100 



200 

 CONCENTRATION, W P P M 



300 



400 



Fig. 6 - 7.6 cm disk torque reduction vs 

 guar gum concentration 



964 



