Synthesis and Characterization of Unique Liquid Crystalline Block Copolyesters. A Proposal for a Polymer Research Center at the Atlanta University.
Abstract
The objectives of the Polk and Bota research team were to prepare liquid crystal block copolyesters which contain cyclohexane and benzene rings. The properties of block copolymers resemble those of incompatible physical blends in some respects and homogenous random copolymers in other respects. Due to the presence of the intersegment bond which prevents the segments from separating, block copolymers usually exhibit two-phase morphology which on the micro level is similar to that of polymer blends on the macro-level. Instead of the averaging of the properties of the different components as found in homogeneous random copolymers, block copolymers display the properties characteristic of each of the components plus some new properties due to the block copolymer morphology. The objectives of the Polk and Bota research team were to use cyclohexane derivatives as the soft blocks and benzene derivatives as the hard block and to optimize the solubility, thermal, and mechanical properties of the resulting (-A-B sub n) block copolyesters while increasing the thermoplastic elastomeric character.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1984
- Accession Number
- ADA147280
Entities
People
- H. Thomas Banks
- J. L. Reed
- K. B. Bota
- M. B. Polk
- Y. H. Mariam
Organizations
- University of Atlanta