A photoactive side-chain polymer from the class of polyimides, polyamide acids and esters thereof, comprising as a side-chain a dentritic block incorporating photoactive groups at its surface. The dentritic block preferably represents a unit of formulae Ia, Ib or a combination of them, for example formulae Ic wherein the broken line symbolizes the linkage to polyimide main chain. The polymer may be used as orientation layer for liquid crystals and in the construction of unstructured and structured optical elements and multi-layer systems.
一种来自聚
酰亚胺、聚酰胺酸和
酯类的光致活性侧链聚合物,其包含一个树状分子块作为侧链,在其表面结合了光致活性基团。所述树状分子块优选代表Ia、Ib或其组合单元,例如Ic式,其中断裂线符号表示与聚
酰亚胺主链的连接。该聚合物可用作液晶取向层,并用于构建非结构化和结构化光学元件和多层系统。