Ring-opening metathesis polymerization of dicyclopentadiene catalyzed by titanium tetrachloride adduct complexes with oxygen-containing ligands

Ring-opening metathesis polymerization of dicyclopentadiene catalyzed by Ti Cl4 . 2L/CH3Li system [where L is tetrahydropyran (I), dioxane, 2,5-dimethy lfuran, or tetrahydrofurfyl alcohol] is reported. The obtained polymer was characterized by IR and H-1-NMR. These catalytic systems effectively promot ed the polymerization reaction. Seven influencing factors are discussed. Wh en the aging temperature was 0 degreesC, the aging time was 90 min, the pol ymerization temperature was 60 degreesC, Li/Ti was 1.5-2, and the monomer/c atalyst molar ratio ranged between 30 and 50, the polymerization reaction c atalyzed by complex 1 yielded better results within a shorter period of tim e. (C) 2001 John Wiley & Sons, Inc.