The “solid-state” ring-opening cationic polymerization of 1,3,5-trioxane: frozen polymerization for suppression of oligomer formation and synthesis of ultrahigh molecular weight polymers

Production of polyoxymethylene with higher molecular weights and lower oligomer ratios than those obtained by molten-state polymerization of 1,3,5-trioxane was demonstrated by conducting polymerization in a “solid state”.