Open AccessDielectric properties of ternary composites of triblock polymer surfactant, liquid crystal and organic solvent
Author(s) -
Michael R. Fisch,
Clinton Braganza,
LiangChy Chien,
Rolfe G. Petschek
Publication year - 2014
Publication title -
journal of advanced dielectrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.38
H-Index - 13
eISSN - 2010-135X
pISSN - 2010-1368
DOI - 10.1142/s2010135x14500222
Subject(s) - materials science , dielectric , ternary operation , dissipation factor , polymer , relaxation (psychology) , solvent , liquid crystal , dielectric spectroscopy , pulmonary surfactant , composite material , chemical engineering , analytical chemistry (journal) , organic chemistry , chemistry , optoelectronics , psychology , social psychology , electrode , electrochemistry , computer science , engineering , programming language
Dielectric spectroscopy, at room temperature (20°C), is used to study the dielectric response of ternary mixtures of commercial nematic liquid crystal mixtures E7 and E33, an organic solvent N-Methyl-2-Pyrrolidone (NMP) and a triblock polymers in the frequency range from 0.01 Hz to 1 MHz. The results indicate a dielectric relaxation in the hectohertz region. Individually, both E7 and NMP have rather large low frequency conductivities; however, the low frequency (0.01–10 Hz) behavior of the mixtures has no such behavior. We attribute this behavior to an ion getter effect of the triblock polymer surfactant. Optimized ternary mixtures obtain a real dielectric constant near 230, and loss tangent less than 0.05 at frequencies near 10 mHz.