Liquid Crystal Polymers: Thermotropic Rigid Aromatic Copolyesters with Bisphenol Spacers.
Abstract
A series of aromatic polyesters based on either poly(chloro-p-phenylene terephthalate) or poly(methyl-p-phenylene terephthalate) modified by incorporation of various amounts of bisphenols of different structures were prepared and their thermotropic liquid crystal properties were studied by several methods including: (1) visual observation of stir-opalescence of the polymer melts, (2) examination of melt birefringence on a polarizing microscope, (3) studies of small angle light scattering characteristics, and (4) characterization by wide angle x-ray diffraction. It was found that the steric effects on non-linear bisphenol modifiers were the most important factors in controlling the liquid crystallinity of the resulting copolyesters. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 09, 1981
- Accession Number
- ADA097667
Entities
People
- J.-i. Jin
- Robert W. Lenz
Organizations
- University of Massachusetts Amherst