Morphology of a Phase Separated and a Molecular Composite 30% PBT/70% ABPBI Block Copolymer

Abstract

The morphology of a triblock copolymer of rigid-rod poly(p-phenylene benzobisthiazole (PBT) and semi-flexible coil poly (2,3(6)benzimidazole) (ABPBI) was examined by wide angle x-ray scattering and scanning and transmission electron microscopy. When samples were vacuum cast from a solution where the amount of 30% PBT/70% ABPBI copolymer was greater than a critical concentration of 5.8%, large-scale phase separation occurred and a film formed containing 0.1- micron particles and platelets in a ductile matrix. The particles and platelets were composed of well-oriented 10-nm PBT crystallites, while the matrix material was chiefly composed of ABPBI. When the amount of 30%PBT/70% ABPBI copolymer in a solvent was less than the critical concentration, the solution into a water coagulating bath had large scale phase separation inhibited.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1987
Accession Number
ADA181069

Entities

People

  • Gary E. Price
  • Stephen J. Krause
  • Tim B. Haddock
  • W. W. Adams

Organizations

  • Arizona State University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Block Copolymers
  • Electron Microscopy
  • Fiber Spinning
  • Films
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Mechanical Properties
  • Microscopy
  • Molecules
  • Phase Separation
  • Polymers
  • Scattering
  • Tensile Strength
  • Transmission Electron Microscopy
  • Wide Angles
  • X Rays

Fields of Study

  • Materials science

Readers

  • Polymer Science and Technology
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics