Mesogenic Properties of Aromatic Oligoesters Derived from Kink-Structured Monomers

Autor: T. R. Deberdeev, L. K. Karimova, A. I. Akhmetshina
Rok vydání: 2021
Předmět:
Zdroj: Key Engineering Materials. 899:208-214
ISSN: 1662-9795
DOI: 10.4028/www.scientific.net/kem.899.208
Popis: Novel liquid crystalline oligomers were prepared using different compositions of kink-structured aromatic dicarboxylic acids, aromatic diols, and 4-hydroxybenzoic acid via high-temperature polycondensation. The reaction products were characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry, and polarized optical microscopy. As a result, the samples containing kinked units with phenyl or naphthalene moiety had a broad processing window limited by the melting process and the isotropization, whereas one based on diphenic acid was almost entirely in an amorphous state. The surface properties of the oligomers were evaluated by wetting measurements using a static contact angle analysis.
Databáze: OpenAIRE