Accession Number:

ADA181069

Title:

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

Descriptive Note:

Interim rept. Jan-Dec 1985

Corporate Author:

ARIZONA STATE UNIV TEMPE DEPT OF MECHANICAL AND AEROSPACE ENGINEERING

Report Date:

1987-01-01

Pagination or Media Count:

49.0

Abstract:

The morphology of a triblock copolymer of rigid-rod polyp-phenylene benzobisthiazole PBT and semi-flexible coil poly 2,36benzimidazole 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 PBT70 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 30PBT70 ABPBI copolymer in a solvent was less than the critical concentration, the solution into a water coagulating bath had large scale phase separation inhibited.

Subject Categories:

  • Polymer Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE