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Copolymerization of Propylene with 1-Hexene and 4-Methyl-1-Pentene in Liquid Propylene Medium. Synthesis and Characterization of Random Metallocene Copolymers with Isotactic Propylene Sequences

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Propylene copolymerization with 1-hexene and 4-methyl-1-pentene in liquid propylene medium in presence of MAO-activated C2-symmetry ansa-zirconocene rac-Me2Si(4-Ph-2-MeInd)2ZrCl2 was studied. Random copolymers of propylene with 1-hexene and 4-methyl-1-pentene content up to 7 mol % were obtained at 60 °C. General kinetic characteristics of propylene/higher α-olefin copolymerization were evaluated. The distinct feature of propylene copolymerization with 1-hexene and 4-methyl-1-pentene in liquid propylene medium – the proximity of comonomer relative reactivity ratios (r1∼r2∼1) that indicates azeotropic nature of copolymerization processes in studied conditions. Synthesized copolymers were characterized with the use of IR, 13C NMR, GPC, WAXD, DSC techniques, and uniaxial tensile testing.

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Correspondence to Anton A. Koval’chuk.

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Koval’chuk, A., Klyamkina, A., Aladyshev, A. et al. Copolymerization of Propylene with 1-Hexene and 4-Methyl-1-Pentene in Liquid Propylene Medium. Synthesis and Characterization of Random Metallocene Copolymers with Isotactic Propylene Sequences. Polym. Bull. 56, 145–153 (2006). https://doi.org/10.1007/s00289-005-0483-1

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  • DOI: https://doi.org/10.1007/s00289-005-0483-1

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