申请人:THE DOW CHEMICAL COMPANY
公开号:EP0430139A2
公开(公告)日:1991-06-05
The present invention describes a polymeric nonlinear optical (NLO) material in which NLO active groups are integral to the polymer chain and a process for producing the NLO material. The polymeric NLO material has recurring monomeric units of the following formula:
where X is a divalent electron-donating group, Ar is a conjugating group, A is a divalent electron-withdrawing group and n is an integer of at least 3. The NLO material may be, for example, a poly(benzene sulphonamide) or a poly(p-benzamide). The polymeric material is prepared by applying a stress to the NLO polymer to induce orientation of the NLO active groups in the polymer such that the material exhibits nonlinear optical capabilities.
本发明描述了一种聚合物非线性光学(NLO)材料(其中 NLO 活性基团与聚合物链为一体)以及生产 NLO 材料的工艺。该聚合物 NLO 材料具有下式的重复单体单元:
其中,X 是二价电子捐献基团,Ar 是共轭基团,A 是二价电子抽离基团,n 是至少 3 的整数。NLO 材料可以是聚苯磺酰胺或聚对苯甲酰胺等。制备聚合物材料的方法是对 NLO 聚合物施加应力,以诱导聚合物中的 NLO 活性基团取向,从而使材料具有非线性光学功能。