BAND STRUCTURE IN SHEAR-DEFORMED HYDROXYPROPYLCELLULOSE LIQUID CRYSTALLINE SOLUTION

Band structure in the hydroxypropylcellulose (HPC) specimen shear-deformed at liquid crystalline state has been examined by the X-ray diffraction, small angle light scattering and microscopic observation. There appeared the periodic band structure perpendicular to the direction of shear, when axially oriented liquid crystalline specimens were relaxed freely for several tens second. Band width, crystalline orientation in the band and light scattering from these band structures were investigated for thin-film from 50% HPC liquid crystalline solution.Hv scattering exhibited two-point patterns extending at right angle to bands, and the maximum of scattering intensity was observed from which the period of band was estimated. The obtained value, 3μm was twice of band width. Crystallographic C-axis, chain direction, in band were inclined about 40 degrees to the direction of shear and the direction of inclination changed alternately from band to band.