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Asymmetrically Branched Alkyl Spacers in Liquid-crystalline Poly(alkylene 4,4′-Terephthaloyldioxydibenzoate)s by del Pino, Javier ;Rocha, Carlos Marco ;Gómez, Marián A. ;Fatou, Jose G. is a Chemistry article available to read on EtoBox.
What is Asymmetrically Branched Alkyl Spacers in Liquid-crystalline Poly(alkylene 4,4′-Terephthaloyldioxydibenzoate)s about?
## Abstract Poly[oxy‐(1,4‐dimethyltetramethylene)oxycarbonyl‐1,4‐phenyleneoxyterephthaloyloxy‐1,4‐phenylenecarbonyl] (1) was synthesized for the first time, and its thermal behaviour was studied by differential scanning calorimetry, thermooptical microscopy, and X‐ray diffraction. The crystal to liquid‐crystal and the mesophase to isotropic transition temperatures are lower by ca. 100°C than the values reported for the unsubstituted polymer. Moreover, the formation of a three‐dimensional order is hindered in the case of the polymer with lateral substituents and can only be achieved by long annealing times.
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- Author
- del Pino, Javier ;Rocha, Carlos Marco ;Gómez, Marián A. ;Fatou, Jose G.
- Publisher
- Wiley (John Wiley & Sons); Wiley (ISSN 0025-116X)
- Published
- 1992
- Language
- EN
- Field
- Chemistry (Physical Sciences)
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