期刊
JOURNAL OF POLYMER SCIENCE
卷 58, 期 8, 页码 1163-1176出版社
WILEY
DOI: 10.1002/pol.20190106
关键词
branched polymers; columnar liquid crystal; main-chain liquid crystalline polymers; poly(ester-ether)s; triphenylene
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.
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