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Turbulent flow friction reduction effectiveness and hydrodynamic degradation of polysaccharides and synthetic polymers
Author(s) -
Kenis Paul R.
Publication year - 1971
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1971.070150309
Subject(s) - xanthomonas campestris , guar gum , polyacrylamide , ethylene oxide , polymer , polysaccharide , materials science , guar , degradation (telecommunications) , xanthomonas , chemical engineering , xanthan gum , composite material , chemistry , polymer chemistry , rheology , copolymer , organic chemistry , biochemistry , telecommunications , computer science , engineering , gene
Two water‐soluble synthetic polymers and several polysaccharides were compared for friction reduction effectiveness during increased exposure to turbulent flow. Solutions were passed through a 0.117 × 41.0 cm fine bore tube at a constant solvent wall shear stress of 4200 dynes/cm 2 and wall shear rate of 4 × 10 5 sec −1 . After one pass through the tube, greatest friction reduction at low polymer concentrations was in the order poly(ethylene oxide) > polyacrylamide > bacterial polysaccharide from Xanthomonas campestris > guar gum. As a result of mechanical degradation, after 40 passes of 40 ppm solutions, friction reduction effectiveness was in the order polyacrylamide > polysaccharide from Xanthomonas campestris > poly(ethylene oxide) > guar gum. Degradation curves, the effect of concentration on degradation, and boundary layer and pipe flow applications are discussed.