Abstract
The polymerization of isoprene (IP) with transition metals (MtX) and methylalumoxane (MAO) catalysts was carried out. Nickel(II) acetylacetonate [Ni(acac)2] in combination with MAO revealed high catalytic activity. The microstructure of the polymers obtained with the Ni(acac)2-MAO catalyst was mainly cis-1,4-units, and but no 1,2-units were observed, indicating that the polymerization of IP with the Ni(acac)2-MAO catalyst proceeds through a mainly 4,1-addition mode. From the copolymerization of styrene (St) and IP with the Ni(acac)2 and MAO catalyst, monomer-reactivity ratios were estimated to be rSt=1.18 and rIP=0.88, indicating an ideal copolymerization to proceed to give a random copolymer. The IP units in the copolymers consist of mainly cis-1,4-microstructure.
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Endo, K., Masaki, K. & Uchida, Y. Polymerization of Isoprene with Ni(acac)2-Methylaluminoxane Catalyst. Polym J 29, 583–587 (1997). https://doi.org/10.1295/polymj.29.583
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DOI: https://doi.org/10.1295/polymj.29.583
