Hoyt and Fabula 



50 



^ 40 



CO 30 



qI I I 1 1 1 1 1 ] 



20 40 60 80 100 120 140 160 



TIME AFTER START OF MIXING, MIN 



Fig. 21 - Rapid mechanical degradation of a dilute 

 poly(ethylene oxide) solution of 15 wppm concen- 

 tration, seen in disk tests 



974 



