화학공학소재연구정보센터
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.239, 123-140, 1994
Synthesis of New Stilbene-Based Polycarbonates
A series of polycarbonates with stilbene mesogens has been prepared and characterized, expanding upon past work with stilbene-based polyesters and polyethers. It has been found that the stilbene mesogen, mono- or di-substituted with methyl or ethyl groups, significantly affects polymer morphology. Polycarbonates containing stilbene mesogens have been studied by differential calorimetry, polarized microscopy and X-ray diffraction. Methyl substituted stilbenes are semicrystalline and appear to be liquid crystalline, whereas ethyl substituted stilbenes are amorphous. Disubstitution lowers the transition temperatures from those values observed for monosubstituted stilbenes.