Premium
Supramolecular liquid‐crystalline polyurethane
Author(s) -
Ambrožič Gabriela,
Žigon Majda
Publication year - 2000
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/(sici)1521-3927(20000101)21:1<53::aid-marc53>3.0.co;2-1
Subject(s) - liquid crystal , polyurethane , differential scanning calorimetry , supramolecular chemistry , hydrogen bond , materials science , intermolecular force , crystallography , fourier transform infrared spectroscopy , mesogen , polymer chemistry , molecule , liquid crystalline , chemistry , organic chemistry , chemical engineering , crystal structure , composite material , thermodynamics , physics , optoelectronics , engineering
A novel supramolecular liquid‐crystalline polyurethane was prepared by mixing the polyurethane containing a pendant pyridyl unit as H‐bond acceptor and 4‐dodecyloxybenzoic acid as H‐bond donor. Intermolecular hydrogen bond formation was confirmed by Fourier transform infrared spectroscopy. The liquid‐crystalline behaviour of the complex formed was established by differential scanning calorimetry, polarizing optical microscopy and X‐ray diffractometry. The complex exhibited highly ordered smectic and nematic phases. The smectic‐nematic and nematic‐isotropic transitions were observed at 89°C and 120°C, respectively.