SYNTHESIS AND POLYMERIZATION OF 2-OXO-3-METHYLENE-5, 6-DIPHENYL-1,4-DIOXAN

摘要

A new cyclic monomer, 2-oxo-3-methylene-5, 6-diphenyl-1, 4-dioxan, was synthesized. Thestructure of the intermediates and the monomer were determined by IR,1H NMR,13C NMR andelemental analysis. This new monomer is different from other cyclic monomers in this series,it isa solid （mp 108--109℃）and not very reactive, but still can undergo free radical ring-openingpolymerization. The free radical polymerization was carried out at 130℃. The structure of theresulting polymer was discussed and charaterized by IR, 1H NMR, 13C NMR and elementalanalysis. The molecular weight of the polymer was estimated by viscosity determination.