Twinned Crystals of Poly (Bis(p-Fluorophenoxy)Phosphazenes--PB(4F)PP

Abstract

Poly(bis(p-fluorophenoxy)phosphazenel)-PB(4-F)PP crystals have been grown from dilute xylene solution. After heating above the thermotropic transition temperature, T(1) and then cooling to room temperature the specimens were examined by electron microscopy. Crystals initially prepared from solution are monoclinic, but then transform to a pseudohexagonal form above the T(1). Upon cooling down to room temperature this phase changes to an orthorhombic modification where the PB(4-F)PP crystals exhibit 60 rotational symmetry.

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Document Details

Document Type
Technical Report
Publication Date
Jun 06, 1988
Accession Number
ADA197684

Entities

People

  • J. H. Magill
  • M. Kojima
  • T. Masuko

Organizations

  • University of Pittsburgh

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Chemical Engineering
  • Chemistry
  • Crystal Structure
  • Crystals
  • Diffraction
  • Electron Diffraction
  • Electron Microscopy
  • Electrons
  • Engineering
  • Heating
  • Materials
  • Materials Laboratories
  • Materials Science
  • Military Research
  • New Jersey
  • Transition Temperature

Readers

  • Materials Science and Engineering.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene