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When butadiene is polymerized in dichloroethane using dibutyl magnesium plus neodymium versatate as catalyst, high-trans polymer is formed during the first few hours of polymerization, followed by slow polymerization of the remaining butadiene to high-cis polymer after 7-8 h. This change probably occurs as a result of slow reaction between catalyst and solvent.

Посилання на статтю:

Sequential formation of trans and cis butadiene homopolymers with one catalyst system / D. K. Jenkins // Polymer. – 1994. – Vol 35. – P. 2897-2898.

Sequential formation of trans and cis butadiene homopolymers with one catalyst system - Завантажити.