Abstraet--A series of thermotropic poly(2-n-alkyl-l,4-phenylene terephthalates) was synthesized and characterized for liquid crystalline properties by differential scanning calorimetry (DSC) and by use of a polarizing microscope. All members of the series, from the polymer with the n-hexyl to that w
Structural effects on the phase behaviour of poly(2-alkyl-1,4-phenylene terephthalate)s
β Scribed by Jerzy Majnusz; Robert W. Lenz
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 280 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0014-3057
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β¦ Synopsis
A~traet--The phase behaviour of selected thermotropic poly(2-alkyl-l,4-phenylene terephthalate)s, in respect to their thermal history and molecular weights and the size of the alkyl substituent, was studied by differential scanning calorimetry and wide angle X-ray diffraction; the results were compared with those obtained from previous studies.
π SIMILAR VOLUMES
Almtraet--A series of n-and iso-alkylhydroquinone and diacetate monomers was synthesized at high purity for the preparation of a series of high molecular weight aromatic polyesters of the type: poly(2-alkyl-1,4-phenylene terephthalates). The reductive alkylation of benzoquinone with the appropriate
## Abstract A vibrational study of two crystalline forms of the __N__,__N__β²βdiphenylβ1,4βphenylenediamine molecule is reported. This compound shows polymorphism in its solid state, i.e. either an orthorhombic or a triclinic structure is obtained depending on the conditions of crystallization. Thre