The present invention discloses new polymers which can assume an accordion-like conformation of the backbone. These polymers are prepared by the copolymerization of two difuntional, chemically precoupled precursors to chromophoric units. The resulting polymers have a head-to-head, tail-to-tail topology (a syndioregic arrangement of rigid units along the polymer backbone), and the molecular units are designed to fold into an "accordion" conformation. This useful microstructure (a three-dimensional conformation) forms spontaneously (self-assembles); or, it can be brought about by field-assisted processing. Films and fibers of these polymers have useful second-order nonlinear optical properties, and may be used for the modulation and switching of optical communications signals.
本发明揭示了一种可以呈手风琴状构象的新型聚合物。这些聚合物是通过两种二官能
化学预联接的色团前体的共聚反应制备而成。所得到的聚合物具有头对头、尾对尾的拓扑结构(聚合物主链上刚性单元的一个合成序列),并且分子单元被设计成能够折叠成“手风琴”状构象。这种有用的微观结构(三维构象)可以自发形成(自组装);或者,它可以通过场辅助加工而产生。这些聚合物的薄膜和纤维具有有用的二阶非线性光学性质,并可用于调制和开关光通信信号。