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Mesophases involving highly ordered smectic phases in a polyether
Author(s) -
Cheng Stephen Z. D.,
Yoon Yeocheol,
Zhang Anqiu,
Savitski Edward P.,
Park JaeYoung,
Percec Virgil,
Chu Peihwei
Publication year - 1995
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1995.030160801
Subject(s) - differential scanning calorimetry , supercooling , materials science , phase transition , crystallography , diffraction , fiber , fiber diffraction , transition temperature , x ray crystallography , thermodynamics , chemistry , composite material , optics , condensed matter physics , physics , superconductivity
Based on our differential scanning calorimetry observations, a polyether 1 synthesized from 4′‐[2‐(4‐hydroxyphenyl)propyl]‐4‐biphenylol and 1,9‐dibromononane shows multiple transition behavior during cooling and heating. Furthermore, these transition temperatures do not exhibit significant supercooling dependence. Detailed analyses of the wide‐angle X‐ray diffraction powder and fiber patterns at different temperatures have indicated that highly ordered smectic F and G phases exist in this polyether and are differentiated from traditional crystalline phases.