Abstract
Thin films of rigid-rod poly(p-phenylene benzobisthiazole) having single crystalline texture were prepared. An above critical concentration polymer solution of 6 wt% in methane sulfonic acid was sheared to orient the chains (c-axis) along the shear axis in the solution state. The sheared solution was then solidified into thin films via coagulation in the water. Self-assembling phenomenon, previously found in rigid-rod PBZT polymer molecules during the coagulation process, was utilized as the driving mechanism for the alignment of crystallographic a and b-axes in the process. WAXS and FTi.r. spectroscopy with the polarized radiation confirmed the presence of single crystal-like orientation in the film specimen with the crystallographic c-axis preferentially oriented parallel to the shear direction, b-axis to the transverse direction, and a-axis normal to the film surface.
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