Butadiene–isoprene copolymerization with V(acac)3‐MAO. Crystalline and amorphous trans‐1,4 copolymers |
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| Authors: | Lucia Zetta Enrica Alberti Tiziano Motta Maurizio Canetti Fabio Bertini |
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| Institution: | 1. CNR‐Istituto per lo Studio delle Macromolecole (ISMAC), via E. Bassini 15, Milano 20133, Italy;2. Dipartimento di Scienze Chimiche e Ambientali, Università degli Studi dell'Insubria, via Valleggio 11, Como 22100, Italy |
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| Abstract: | Butadiene‐isoprene copolymerization with the system V(acac)3‐MAO was examined. Crystalline or amorphous copolymers were obtained depending on isoprene content. Both butadiene and isoprene units exhibit a trans‐1,4 structure and are statistically distributed along the polymer chain. Polymer microstructure, comonomer composition, and distribution along the polymer chain were determined by 13C and 1H NMR analysis. The thermal and X‐ray behaviors of the copolymers were also investigated and compared with results from solid‐state 13C NMR experiments. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 4635–4646, 2007 |
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| Keywords: | butadiene– isoprene copolymers catalysts copolymerization NMR vanadium |
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