The ring-opening metathesis polymerization of dicyclopentadiene with dimeth
yltitanocene and in situ prepared substituted dimethyltitanocenes was studi
ed. The results showed that at low concentration dimethyltitanocene catalyz
ed the polymerization of dicyclopentadiene to give linear polymer at 70-90
degrees C and that the introduction of oxygen-containing substituents on cy
clopentadienyl rings decreased catalytic activity due to a steric effect. (
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