Open AccessExperimental investigation on the thermal resistance of thermotropic aromatic oligoesters
Author(s) -
Т. Р. Дебердеев,
L. K. Karimova,
D. V. Kochemasova,
S. V. Grishin,
Alexey Shinkarev,
Alsu I. Akhmetshina
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1942/1/012012
Subject(s) - thermotropic crystal , condensation polymer , mesophase , dibasic acid , polymer , polymer chemistry , characterization (materials science) , chemistry , optical microscope , polyester , macromolecule , materials science , organic chemistry , liquid crystalline , scanning electron microscope , nanotechnology , biochemistry , composite material , phase (matter)
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.