Experimental investigation on the thermal resistance of thermotropic aromatic oligoesters

Synthesis and characterization of liquid crystalline polymers based on 4-hydroxybenzoic acid, aromatic dibasic acids, and aromatic diols via a high-temperature polycondensation are described. FT-IR spectroscopy was employed to evaluate a molecular weight of the samples that can be considered as olig...

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Bibliographic Details
Published in:Journal of physics. Conference series 2021-06, Vol.1942 (1), p.12012
Main Authors: Deberdeev, T R, Karimova, L K, Kochemasova, D V, Grishin, S V, Shinkarev, A A, Akhmetshina, A I
Format: Article
Language:English
Subjects:
Chemical synthesis
Crystal structure
Crystallinity
Diols
High temperature
Infrared spectroscopy
Liquid crystal polymers
Liquid crystals
Macromolecules
Physics
Thermal resistance
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Summary:Synthesis and characterization of liquid crystalline polymers based on 4-hydroxybenzoic acid, aromatic dibasic acids, and aromatic diols via a high-temperature polycondensation are described. FT-IR spectroscopy was employed to evaluate a molecular weight of the samples that can be considered as oligoesters. The mesophase existence ranges of the samples were estimated by means of DSC and optical polarizing microscopy. Liquid crystalline oligoesters offer excellent thermal (T 0 = 250-373 °C) properties. The macromolecules obtained contain reactive terminal groups and retain the ability to grow at elevated temperatures.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1942/1/012012