Accession Number:

ADA265584

Title:

Copolymers for Drag Reduction in Marine Propulsion: New Molecular Structures with Enhanced Effectiveness

Descriptive Note:

Annual rept. 1 Jun 92-31 May 93,

Corporate Author:

UNIVERSITY OF SOUTHERN MISSISSIPPI HATTIESBURG DEPT OF POLYMER SCIENCE

Report Date:

1993-05-31

Pagination or Media Count:

51.0

Abstract:

Responsive synthetic copolymers have been tailored with specific microstructural features in order to elucidate drag reduction behavior in aqueous media. Our studies have clearly shown the role of the polymer on ordering of solvent in the vicinity of the macromolecular coil. Specific runs of hydrophobic units spaced by hydrophilic units are necessary for macrophase organization in aqueous media. We have prepared pH- and salt-responsive drag reducing systems based on zwitterionic and ionic polymer structures which have the best drag reducing properties reported to date. The copolymers of acrylamide with 3-2-acrylamido-2-methylpropanedimethylammonio-1-propane sulfonate AMPDAPS showed the highest drag reduction efficiency as measured by a rotating disk apparatus. The polymer can be prepared by inverse emulsion or microemulsion techniques for repaid dispersion.

Subject Categories:

  • Physical Chemistry
  • Polymer Chemistry
  • Marine Engineering
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE