Distribution of Matrix Homopolymer in Block Copolymers of Spherical Morphology.

Abstract

Samples made by blending deuterated polystyrene Sd of three different molecular weights with a polystyrene-polybutadiene block copolymer SB were studied with small-angle scattering techniques using X-rays (SAXS) and neutrons (SANS). The SANS results were sensitive both to the amount of added homopolymer Sd and to its chain length. Anomalously high SANS intensities and the absence of an intraparticle scattering maximum are consistent with the exclusion of added Sd from the corona of the SB micelles, resulting in Sd enrichment of the interstitial regions. Keywords: Block copolymers, Polymer chain configuration.

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Document Details

Document Type
Technical Report
Publication Date
Jul 29, 1987
Accession Number
ADA183317

Entities

People

  • C. V. Berney
  • Paul Cheng
  • Robert E. Cohen

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Block Copolymers
  • Chemical Engineering
  • Chemistry
  • Copolymers
  • Dielectric Polymers
  • Diffraction
  • Dispersing
  • Engineering
  • Macromolecules
  • Massachusetts
  • Materials
  • Materials Laboratories
  • Materials Science
  • Military Research
  • Molecular Weight
  • Polymers
  • Scattering

Readers

  • Astronomy/Astrophysics
  • Polymer Science and Technology

Technology Areas

  • Microelectronics