STRUCTURE INVESTIGATIONS OF A CROSS-LINKABLE MAIN-CHAIN LIQUID-CRYSTALLINE COPOLYESTER BY INFRARED-SPECTROSCOPY, DIFFERENTIAL SCANNING CALORIMETRY AND WIDE-ANGLE X-RAY-SCATTERING
Kj. Eichhorn et al., STRUCTURE INVESTIGATIONS OF A CROSS-LINKABLE MAIN-CHAIN LIQUID-CRYSTALLINE COPOLYESTER BY INFRARED-SPECTROSCOPY, DIFFERENTIAL SCANNING CALORIMETRY AND WIDE-ANGLE X-RAY-SCATTERING, Macromolecular chemistry and physics, 197(11), 1996, pp. 3729-3742
FTIR spectroscopy, differential scanning calorimetry (DSC) and wide-an
gle X-ray scattering (WAXS) were used for the characterization of stru
ctural properties of a cross-linkable ternary liquid crystalline (Ic)
copolyester and its binary model copolyesters. The copolyesters based
on itaconoylbis(4-oxybenzoic acid), sebacoylbis(4-oxybenzoic acid) and
2-methylhydroquinone were annealed at different temperatures to analy
se the structural changes of mesogenic and spacer segments due to thei
r phase transitions. The results of the DSC and WAXS measurements are
useful to explain the small effects in the IR spectra connected with p
olymer morphology. FTIR spectroscopy is able to provide information ab
out the molecular structure along the polymer chains and also about th
e interactions between these chains. Micro- and macromolecular structu
res influence the orientation and crosslinking processes in dependence
on temperature and time. It was shown that an increase in the ordered
state and quality of crystallinity was obtained using different annea
ling procedures.