Synthesis of Liquid Crystalline Epoxy Oligomers: Effect of Molecular Weight on the Phase Behavior

摘要: A series of epoxy-terminated liquid crystalline oligomers with different molecular weights having α-methylstilbene as the mesogenic unit were synthesized and characterized by means 1H NMR FT-IR spectroscopy, differential scanning calorimetry (DSC), polarized-light optical microscopy (POM) X-ray diffraction. The effect initial ratio between epichlorohydrin diol on weight was not significant enough to change thermal behavior essentially. copolymerization epoxy- hydroxyl-terminated comonomers yielded high-molecular oligomer, whose enantiotropic character proved DSC, POM