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Shear stability, drag reduction

It has been shown that hydrogen bonding-mediated interpolymer complexes can be powerful drag reducers. The drag-reduction levels in such polymer systems increase dramatically by a factor of 2 to 6 when compared with their nonassociating polymeric precursors. Their shear stability is also shown to be significantly enhanced [1156]. [Pg.170]

Deshmukh SR, Singh RP (1987) Drag reduction effectiveness, shear stability and biodegrada-dation resistance of guargum-based graft copolymers J Appl Polym Sci 33 1963... [Pg.159]

Reddy GV, Singh RP (1985) Drag reduction effectiveness and shear stability of polymer-polymer and polymer-fiber mixtures in redrculatory turbulent flow of water Rheol Acta 24 296... [Pg.164]

Deshmukh, S. R., and Singh, R. R, Drag reduction effectiveness, shear stability and biodegradation resistance of guar gum-based graft copolymers, J. Appl. Polym. Sci., 33,1963-1975 (1987). [Pg.117]

Shear Stability of Graft Polymers in Drag Reduction. 165... [Pg.136]

Mechanochemistry of Graft Polymers 5.1 Polymer Shear Stability in Drag Reduction... [Pg.164]

The study of the shear stability of macromolecular aggregates is promoted by the searching of polymeric drag reduction agents. Linear polymers have an excellent... [Pg.187]

Dynamic topologies. Polymer aggregates seem most promising for drag reduction applications because both the shear stability, and the performance are improved through supramolecular associations. However, many fundamental questions remain unanswered. How does the strength of the secondary bonds... [Pg.194]

Kowalik and co-workers (46) and Mafik and co-workers (47-49) presented a new approach in development of shear stable and efficient drag reducers based on intermolecular associations and intermolecular complexes based on secondary interactions. These systems displayed higher drag-reduction efficiency and shear stability. The associations may be caused by electrostatic, hydrogen-bonding, or... [Pg.2259]

Singh, R. P., Drag reduction and shear stability mechanisms. Encyclopedia of Fluid Mechanics, Polymer Flow Engineering Vol. 9 (I. P. Cheremisinoflf, ed.), 1990, p. 425. [Pg.216]

Mechanically induced reactions for polymers in solution are also of wide import. Cases include the stability of polymers involved in drag reduction and in biological fluids. The shear stability of polymers in solution is also of vital importance in certain commercial hydraulic and lubricating oils. [Pg.4]

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Drag reduction

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Shear stability

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