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Dielectric investigations on a binary system showing a “filled” S A Phase
Author(s) -
Stettin H.,
Kresse H.
Publication year - 1989
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170240429
Subject(s) - polar , dielectric , chemical polarity , binary number , relaxation (psychology) , phase (matter) , mixing (physics) , molecule , anisotropy , condensed matter physics , range (aeronautics) , chemistry , chemical physics , materials science , physics , optics , quantum mechanics , organic chemistry , mathematics , psychology , social psychology , arithmetic , composite material
A binary system of a double swallow‐tailed compound and a substance with a strong polar terminal group shows a pronounced induced S A phase. Investigations of the static dielectric anisotropy indicated a deviation from the simple mixing rule which was empirically introduced. We derived a better approximation taking into account the different molecular volumes of the substances. An unexpected increasing mobility of the strong polar molecules could be detected by relaxation measurements. This may be connected with a change in the short range order of the strong polar compound which is caused by the repulsive forces of the molecules.