Graft Copolymers of Rigid-Rod Poly(P-Phenylenebenzobisimidazole)

Abstract

Poly(p-phenylenebenzobisimidazole) with a pendent 2-benzothiazole group (PPBI) was dissolved in dimethylsulfoxide through reaction with sodium methylsulfinylmethide. Propylene oxide was reacted with the resultant benzimidazole anions to give a graft copolymer with a rigid-rod backbone and flexible polypropylene oxide (PPO) side-chains. In some cases, graft copolymers with greater than 50% PPO content by weight were obtained. Although the thermooxidative stability of the PPBI was substantially reduced through the incorporation of PPO into the polymer structure, solubility in organic solvents and fusibility were substantially improved. Through processing at elevated temperatures (374-450 F) and moderate pressures (500-750 pounds per square inch) , molded specimens could be prepared from the neat graft copolymers. Rigid-rod polymers, Graft copolymers, Polypropyleneoxide, Benzobisimidazole, Fusibility, Solubility, Organic solvents.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1990
Accession Number
ADA220369

Entities

People

  • D. R. Moore
  • Robert C. Evers
  • Thuy D. Dang

Organizations

  • Wright Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Acids
  • Air Force
  • Air Force Facilities
  • Composite Materials
  • Copolymers
  • Diffraction
  • Infrared Spectra
  • Materials
  • Materials Laboratories
  • Mechanical Properties
  • Molecular Weight
  • Polymer Degradation
  • Polymers
  • Rigid Rod Polymers
  • Rod Polymers
  • Solubility
  • Spectra

Fields of Study

  • Chemistry
  • Materials science

Readers

  • Polymer Science and Technology

Technology Areas

  • Microelectronics