Synthesis and Processing of Liquid Crystal/Coil Diblock Copolymers

本研究旨在制备新型的主链和侧链 液晶聚合物并将其引入二嵌段 具有一个常规线圈嵌段的共聚物。 合成 该方法将利用阴离子聚合技术， 制作定义明确的模型材料。 液晶块/线圈 嵌段共聚物及其与液晶均聚物的共混物 和卷曲均聚物以及小分子发色团 和介晶将在几个长度尺度上表征， 显微镜和散射技术。 尤其是他们的自我- 组装成长程有序的微区阵列， 根据主链或侧链的影响进行检查 液晶块上材料间的性质划分 面 由于存在应用的 微相分离转变期间的场（例如电， 磁场和流体动力学流场），以便 生产单晶织构样品用于评估为非线性 光学材料 这是一个材料合成和加工活动联合 由Christopher K.康奈尔大学的奥伯和 埃德温湖马萨诸塞州理工学院的托马斯。

This research seeks to prepare novel main-chain and side-chain liquid crystalline polymers and to incorporate these into diblock copolymers with one conventional coil block. The synthetic approach will utilize anionic polymerization techniques so as to produce well-defined model materials. Liquid crystal block/coil block copolymers and their blends with liquid crystal homopolymer and coil homopolymer as well as with small molecule chromophores and mesogens will be characterized at several length scales using microscopy and scattering techniques. In particular, their self- assembly into long-range ordered arrays of microdomains will be examined in light of the influence of a main-chain or side-chain liquid crystal block on the nature of the intermaterial dividing surface. Biased self-assembly due to the presence of an applied field during the microphase separation transition (e.g. electric, magnetic, and hydrodynamic flow fields) will be undertaken so as to produce single-crystal-texture samples for assessment as nonlinear optical materials. This is a Materials Synthesis and Processing activity jointly carried out by Christopher K. Ober of Cornell University and Edwin L. Thomas of Massachusetts Institute of Technology.