The effect of AgNO_3 and as-produced Ag on phase zone and viscoelastic properties of hexagonal liquid crystal was investigated by using polarized light microscope and RS-75 rheosress. AgNO_3 and as- produced Ag can make hexagonal phase region shrink slightly. The results of stress sweep show that the critical stresses decrease for pure hexagonal phase and are related to the applied frequency for samples adjacent to hexagonal phase zone. The frequency sweep shows that the relaxation time becomes long and the viscoelastic exponents decrease as results of the aggregation and connection of as-produced Ag on EO chains from the surface of micelles. The results of creep are accordance with ones of oscillation experiment and quantify viscoelastic composition, which explained by the springdashpot model and spacial configuration and interaction in hexagonal phase.

Key words: SILVER NITRATE, HEXAGON, LIQUID CRYSTAL, PHASE STRUCTURE, RHEOLOGICAL PROPERTY, NANOPHASE MATERIALS, SILVER, POLARIZING MICROSCOPES