A thermally curable system containing DπA groups can be poled by an electrical field while, simultaneously, the system is cured. Thus favourable NLO-waveguides can be obtained. The disclosed systems comprise a DπA group containing compound (A) having two or more functional groups and a compound (B) having two or more functional groups reactive towards (A). Essentially, one of the components (A) or (B) contains isocyanate groups. To obtain a polymeric network at least one of the compounds (A) or (B) should be tri-or higher functional.
含有 DπA 基团的热固化体系可以在固化的同时通过电场进行极化。因此,可以获得良好的 NLO 波导。所公开的系统包括含有两个或两个以上官能团的含 DπA 基团的化合物 (A) 和具有两个或两个以上对 (A) 反应的官能团的化合物 (B)。基本上,(A)或(B)成分之一含有
异氰酸酯基团。为了得到聚合网络,化合物(A)或(B)中至少有一种应该是三官能团或更高官能团。