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

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.

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Document Details

Document Type
Technical Report
Publication Date
May 31, 1993
Accession Number
ADA265584

Entities

People

  • Charles L. Mccormick
  • Roger D. Hester

Organizations

  • University of Southern Mississippi

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alkanes
  • Alkenes
  • Anhydrides
  • Aqueous Solutions
  • Chemical Synthesis
  • Chemistry
  • Geometry
  • Macromolecules
  • Measurement
  • Organic Chemistry
  • Polymers
  • Scattering
  • Water

Fields of Study

  • Chemistry

Readers

  • Fluid Dynamics.
  • Polymer Science and Technology

Technology Areas

  • Microelectronics
  • Space
  • Space - Orbital Debris