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Siloxane‐containing liquid‐crystalline supramolecular polymers: Preparation and study of thermotropic behavior
Author(s) -
Racles Carmen,
Cazacu Maria
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.28516
Subject(s) - thermotropic crystal , siloxane , mesophase , differential scanning calorimetry , materials science , supramolecular chemistry , thermal stability , polymer chemistry , supramolecular polymers , polymer , liquid crystal , silane , fourier transform infrared spectroscopy , infrared spectroscopy , chemical engineering , organic chemistry , molecule , chemistry , composite material , liquid crystalline , physics , optoelectronics , engineering , thermodynamics
New hydrogen‐bonding supramolecular polymers were obtained from 4,4′‐bipyridine and different silicon‐containing diacids. The formation and thermal stability of these complexes were verified with Fourier transform infrared spectroscopy following the specific absorption bands at 1950 and 2450 cm −1 . Their thermotropic behavior was investigated with polarizing optical microscopy and differential scanning calorimetry. All the obtained supramolecular compounds were liquid crystals within mesophase ranges that depended on the structure of the starting siloxane/silane diacid. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008