Epoxy-carbazole compositions: Part II. Compositions with 5-(9-carbazolyl)methyl-1,3-oxothiolane-2-thione

The method of receiving mixed epoxy-carbazole compositions which, for the fact of its photoluminescence ability, may be used for production of LEDs diodes, has been elaborated. Mechanical, thermal and optical properties of low-molecular-weight epoxy resin Ruetapox 0162 of different content of 5-(9-carbazolyl)methyl-1,3-oxothiolane-2-thione has been examined. It has been also confirmed that in the reaction of co-cross-linking of resin and carbazole derivatives; materials of typical for epoxy resin: high mechanical strength, thermal stability, low water absorption, and low flammability, have been obtained. Radiation absorption spectrums in UV range and photoluminescence of maximum of respectively 328 and 342 nm and also 348 and 365 nm are characteristic for isolated carbazole molecules, which proves that epoxy resin may well perform a function of scattering matrix for carbazolyl substituents. The compositions of 5 wt.% is characterized by the best mechanical features and the highest photoluminescence intensity.