Synthesis and characterization of chiral smectic side-chain liquid crystalline polysiloxanes and ionomers containing sulfonic acid groups

摘要: The synthesis of new chiral smectic A (S-A) side-chain liquid crystalline polysiloxanes (LCPs) and ionomers (LCIs) containing 4-allyloxy-benzoyl-4-(S-2-ethylhexanoyl) p-benzenediol his ate (ABB) as mesogenic units 4-[[4-(2-propenyloxy)phenyl] azo]benzensulfonic acid (AABS) nonmesogenic is presented. chemical structures the monomers polymers are confirmed by FTIR spectroscopy or H-1-NMR. Differential scanning calorimetry (DSC), optical polarizing microscopy, X-ray diffraction measurements reveal that all P-I-P-IV P-V-P-VI exhibit S-A texture. results seem to demonstrate tendency toward S-A-phase region increases with increasing sulfonic concentration, thermal stability phase determined flexibility polymer backbones interactions groups. (C) 2001 John Wiley & Sons, Inc.