Monomeric and dimeric Schiff bases with cyanate terminals were prepared and characterized. Polarized optical microscopy revealed the narrow mesomorphic ranges for the corresponding monomer and dimers. Cyclotrimerization of cyanate groups was identified by differential scanning calorimetry (cure exotherms between 160 and 270°C) and infra-red spectroscopy (triazine absorptions at 1567 and 1370 cm-~). The cured dimers are hard and transparent.
Посилання на статтю:
Liquid crystalline Schiff bases with cyanate terminals / Ying-Hung Wang, V. Yeng-Long Hong* and Jin-Long Hong // Polymer. – 1993. – Vol 34. – P. 1970-1971.