Rheology and Optical Properties of Thermotropic Liquid Crystalline Polymers

热致液晶聚合物的新应用 （TLCP）目前由于缺乏对 在液晶状态下的结构形成过程， 在固化过程中（转变为结晶状态）。 等 需要理解控制机械，电气， 光学性质不仅取决于 分子性质，而且对大规模的纹理。 这 研究涉及TLCPs结构的合作研究 在流变学和磁场中。 光散射和 显微镜（R.S. Stein）和流变学（H.H.冬季）将适用 到专门合成的样本（拍立得）和磁性 实验室的领域将被用来创建必要的 对齐。 中间质构状态将由 施加明确的机械和电场。 研究 场诱导单畴的特性将给出 （Miesowicz粘度，Frank弹性常数） 来理解多畴的行为。 自然多域 和中间向错密度将研究奠定 实际应用的基础（设计合适的 加工设备）以及理论描述 多结构域TLCPs。

Novel applications of thermotropic liquid crystalline polymers (TLCP) are currently prevented by the lack of understanding of the structure formation processes in the liquid crystalline state and during solidification (transition to the crystal state). Such understanding is required for controlling mechanical, electrical, and optical properties which not only depend on the intrinsic molecular properties but also on the large-scale texture. This research involves a cooperative study of the structuring of TLCPs in rheological and magnetic fields. Light scattering and microscopy (R.S. Stein) and rheology (H.H. Winter) will be applied to specifically synthesized samples (Polaroid) and the magnetic field of a laboratory will be utilized to create the necessary alignment. Intermediate textural states will be produced by applying well-defined mechanical and electrical fields. The study of the field induced monodomain will give the intrinsic properties (Miesowicz viscosities, Frank elastic constants) which are needed to understand the behavior of polydomains. The natural polydomain and intermediate disclination densities will be studied to lay the foundation for practical applications (design of suitable processing equipment) as well as for a theoretical description of polydomain TLCPs.