Mesogenic Rodlike Aromatic Polyesters.

Abstract

We have explored the effect of substituents on the crystal nematic and nematic isotropic transition temperatures of poly (p-phenylene terephthalate). The substituents halogen, phenyl, and hexyl replaced hydrogen on the ring of hydroquinone or terephthalic acid. One gets a much larger reduction of the transition temperatures if a phenyl substituent is on terephthalic acid. We believe this substituent forces the carbonyl group out of the ring plane, and creates a more flexible link.

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Document Details

Document Type
Technical Report
Publication Date
Dec 05, 1987
Accession Number
ADA189614

Entities

People

  • William R. Krigbaum

Organizations

  • Duke University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Chemical Synthesis
  • Chemistry
  • Copolymers
  • Crystals
  • Dacron
  • Fiber Spinning
  • Fibers
  • Injection Molding
  • Macromolecules
  • Mechanical Properties
  • Orientation (Direction)
  • Polyesters
  • Polymers
  • Statistical Samples
  • Terephthalic Acid
  • Transition Temperature
  • Transitions

Fields of Study

  • Chemistry

Readers

  • Polymer Science and Technology