Viscosity of 12% PVB solutions

Viscosity of 12% PVB solutions. Solutions were prepared with 0.1185Kinematic viscosities were measured in a size 400 Cannon-Zhukov viscometer. In this viscometer, the apparent shear rate at the wall, y =T /iy, ranged from 2.5 to 40 sec". It is possible tliat non-Newtonian effects were present even at these low shear rates. However, such effects would only alter the data quantitatively—but not qualitatively—and the qualitative features of the data are the focus of this investigation. For further details about equipment and procedures, see Ref. 35. 

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