Accession Number:

ADA220369

Title:

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

Descriptive Note:

Final rept. Jun 1986-Jun 1987

Corporate Author:

WRIGHT RESEARCH AND DEVELOPMENT CENTER WRIGHT-PATTERSON AFB OH

Report Date:

1990-02-01

Pagination or Media Count:

21.0

Abstract:

Polyp-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.

Subject Categories:

  • Polymer Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE