Physical-Chemical Properties of Articulated Rodlike Polymers
Abstract
Investigation on solutions of rodlike poly(p.phenylene benzobisthiozole), PBT, and articulated modification of PBT and poly (p. phenylene benzobisoxazole), PBO, are reported in three parts: dilute solution characterization of PBT and articulated PBO and PBT copolymers; rheological and rheo-optical studies on concentrated solutions of PBT; and solution processing of PBT into oriented ribbons using an improved version of the Wong-apparatus. In the first section, the effects of interchain association are studied. It is found that each of four articulated PBO copolymers studied is aggregated, even in dilute solution, and that the aggregation of a PBT sample studied depends on its solution/precipitation history. In the second section, the transient behavior leading to steady state flow, and the relaxation subsequent to cessation of flow are studied, with recommendations for solution processing. In the third section, solution processing methods to fabricate well oriented ribbons of PBT are studied, leading to a ribbon with a modulus of 600 g/denier for the specimen with highest modulus.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1981
- Accession Number
- ADA117904
Entities
People
- C. C. Lee
- G. C. Berry
- R. Furukawa
- Y. Einaga
Organizations
- Carnegie Mellon University