The Effect of Pressure on the Non-Newtonian Behavior of Polymer Blended Petroleum Oils

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Abstract
The shear dependence of polymer containing oils at elevated pressure was observed in a capillary-type viscometer and is reported. Recoverable shear strain was not observed at elevated pressures but was observed at atmospheric pressure in the blends at the same shear stress. The fluids examined included a paraffinic base oil (B), B plus four and eight weight percent methacrylate, B plus four weight percent styrene, a naphthenic base oil (F), and F plus four weight percent methacrylate.

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