Epoxy-carbazole compositions Part I. Compositions with 9-(2,3-epoxypropyl)carbazole
Polimery 2003, No 9, 641
Compositions of low-molecular weight epoxy resin Ruetapox 0162 mixed with various amounts of 9-(2,3-epoxypropyl)carbazole (EPK) have been prepared and cured by isophorone diamine. Mechanical, thermal and photoluminescence properties of obtained materials were determined. It was found that low-molecular weight epoxy resin is an excellent dispersing matrix for carbazole groups, which secures suitable mechanical properties, low combustibility aud high thermal stability of prepared materials. Moreover, it was observed that the addition of 10 wt. % of EPK improves compression strength by 15%, flexural strength by 33% and also slightly decreases water absorption. Thin film forming ability and optic properties, characteristic for isolated carbazole molecules (photoluminescence maxima at 352 and 368 rim), point at the possibility to use studied niaterials for light-emitting diodes (LED) construction.
Keywords: epoxy resins, 9-(2,3-epoxypropyl)carbazole, light-emitting diodes, mechanical properties, thermal properties, photoluminescence properties