Improved Chem/Bio Protection Clothing for Military Personnel by Probing Nanoscale Structure in Block Copolymers

Abstract

We report a systematic investigation of the morphology of sulfonated styrenic pentablock copolymer solutions and membranes obtained from Kraton Polymers LLC. The polymer studied was poly((t-butyl-styrene)-b-(ethylene-r-butylene)-b- (styrene-r-styrene sulfonate)-b-(ethylene-r-butylene)-b-(t-butyl-styrene)). Small angle x-ray scattering (SAXS) revealed that the solutions exhibited micellar morphologies. The solution SAXS data was modeled using the Kinning-Thomas model to obtain radius of the micelle core, the radius of closest approach between two micelles and the number density of micelles; these characteristics will be correlated to suspension viscosity to aid in membrane production. The membranes have microphase separated morphologies, but the type and symmetry of these pentablock morphologies are not yet identified. All the membrane morphologies are anisotropic with smaller periodicites perpendicular to the membrane relative to in the membrane.

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Document Details

Document Type
Technical Report
Publication Date
Dec 23, 2008
Accession Number
ADA500947

Entities

People

  • Karen I Winey

Organizations

  • University of Pennsylvania

Tags

Communities of Interest

  • Human Systems

DTIC Thesaurus Topics

  • Abstracts
  • Alkenes
  • Biomedical And Dental Materials
  • Block Copolymers
  • Chemistry
  • Clothing
  • Copolymers
  • Department Of Defense
  • Engineering
  • Films
  • Materials
  • Military Personnel
  • Polymers
  • Scattering
  • Students
  • X Ray Scattering
  • X Rays

Readers

  • Polymer Science and Technology
  • Underwater engineering and Marine Technology.

Technology Areas

  • Microelectronics