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Mesomorphic properties of linear and branched new triphenylene‐based poly(ester‐ether)s
Author(s) -
Suburu Matias E. G.,
Cecchi Florencia,
D'Accorso Norma,
Cukiernik Fabio Daniel
Publication year - 2020
Publication title -
journal of polymer science
Language(s) - English
Resource type - Journals
eISSN - 2642-4169
pISSN - 2642-4150
DOI - 10.1002/pol.20190106
Subject(s) - triphenylene , branching (polymer chemistry) , discotic liquid crystal , materials science , polymer , ether , polymer chemistry , liquid crystal , molecule , mesophase , atmospheric temperature range , thermal , organic chemistry , thermodynamics , chemistry , composite material , physics , optoelectronics
A series of main chain discotic liquid crystal polymers, synthesized following a new approach based on the incorporation of triphenylene units in both comonomers, show ordered columnar mesophases in a very wide thermal range, including room temperature. The introduction of branching points based on the same kind of triphenylene units increases their thermal range and gives rise to glassy low‐temperature phases. Room temperature extrusion of these polymers yields fibers with molecules oriented perpendicular to the mechanical stress, and an orientational order parameter close to 0.5, which slightly increases for branched polymers.