Electroactive Polymers

将进行两类电活性聚合物的合成和性能；在这两种情况下，合成和加工都代表了有些新颖的化学和加工技术。第一类电活性聚合物是由2，5-二乙炔基噻吩氧化偶联而成的，它含有由1，3-二炔单元连接的噻吩环，由于其棒状结构和易于加工，可以制备成高度取向的薄膜。这种聚合物应该是导电的，具有转变为本质导电材料所需的结构特征，并通过热、化学或光化学转化为独特的结构，可以显示出各种电活性特性。第二类聚合物可以通过有序单体组件的聚合来合成，该聚合物包含旨在表现出有效的二次谐波产生的共轭给体-受体单元。这种组装是通过在近晶C相中极化非外消旋手性单体(铁电单体)，然后通过自由基或阳离子引发进行聚合来实现的。这些材料的合成最终应该允许制造具有更高的电子和计算机速度和能力的各种装置。

The synthesis and properties of two classes of electroactive polymers will be carried out; in both cases the synthesis and processing represent chemistry and processing techniques that are somewhat novel. The first type of electroactive polymer, synthesized by the oxidative coupling of 2,5-diethynylthiophenes and containing thiophene rings connected by 1,3-diyne units, could be fabricated into a highly oriented film because of its rod-like structure and facile processability. This polymer should be conductive, possesses the structural features necessary for transformation into an intrinsically conductive material, and conversion thermally, chemically, or photochemically into unique structures that could exhibit a variety of electroacitve properties. The second class of polymer, containing a conjugated donor- acceptor unit designed to exhibit efficient second harmonic generation, can be synthesized by the polymerization of an ordered monomer assembly. This assembly is achieved by poling a non-racemic chiral monomer (ferroelectric monomer) ia a smectic C phase and then effecting the polymerization through radical or cationic initiation. The synthesis of these materials should ultimately allow the fabrication of various devices with improved electronic and computer speed and capacity.