STUDIES ON DIACETYLENIC VINYL COMPOUNDS .7. SYNTHESIS AND POLYMERIZATION OF ALKA-3-5-DINYLMETHACRYLATES AND 1,8-BIS(METHACRYLOXY)OCTA-3,5-DIYNE

Three alka-3,5-diynylmethacrylate and 1,8-Bis(methacryloxy)octa-3-5-dy ine were synthesized and their polymerisation in thp molten state was studied. 3,5-Octadiynylene-1,8-dimethacrylate, which was the only one that was solid at room temperature, was not light sensitive in the sol id state. All the monomers underwent rapid polymerization at 140 degre es C. The DSC and IR-spectra indicated that the polymerization of the vinyl and diacetylenic groups takes place simultaneously. An optically highly transparent, yellow-orange glass was obtained.