Dielectric measurements on a liquid-crystalline random copolyester
β Scribed by Doz. Dr. H. Kresse; S. Ernst; E. Hempel; Prof. Dr. F. Kuschel
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- English
- Weight
- 148 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0232-1300
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π SIMILAR VOLUMES
## Abstract The complex dielectric permittivity has been measured in the 10^3^β10^6^ Hz frequency range for selected random copolyesters of poly(ethylene terephthalate). The variation of the dielectric properties with temperature has been qualitatively related mainly to two processes. The Ξ± relaxat
The melt polycondensation of mixtures of sebacic acid (S), 4,4Π-diacetoxybiphenyl (B), and 4-acetoxybenzoic acid (H), carried out for the synthesis of semiflexible liquid-crystalline copolyesters referred to as SBH 1 : 1 : x, has been studied with the aim of clarifying the effect of the reaction con
A copolyester was prepared from p-hydroxybenzoic acid (HBA), 2,6-naphthalene dicaboxylic acid (NDA), and hydroquinone (HQ). Thermal transition behavior and the crystal structure of this copolyester were investigated by using polarized light microscopy (PLM), differential scanning calorimetry (DSC),