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Polyolefins containing 1,3-disubstituted cyclopentane units as nucleating agents for isotactic polypropylene

Authors

  • Naofumi Naga,

    Corresponding author
    1. Department of Applied Chemistry, Materials Science Course, College of Engineering, Shibaura Institute of Technology, 3-7-15 Toyosu, Kohtoh-ku, Tokyo 135-8548 108-8548, Japan
    • Department of Applied Chemistry, Materials Science Course, College of Engineering, Shibaura Institute of Technology, 3-7-15 Toyosu, Kohtoh-ku, Tokyo 135-8548 108-8548, Japan
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  • Koichi Kitaura,

    1. Department of Organic and Polymer Materials Chemistry, Faculty of Technology, Tokyo University of Agriculture and Technology, Naka-cho, Koganei, Tokyo 184-8588, Japan
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  • Akinori Toyota

    1. Department of Organic and Polymer Materials Chemistry, Faculty of Technology, Tokyo University of Agriculture and Technology, Naka-cho, Koganei, Tokyo 184-8588, Japan
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Abstract

Polyolefins containing 1,3-disubstituted cyclopentane units in the main chain have been synthesized by 1,3-polymerization of cyclopentene (PCP), cyclization polymerization of 1,5-hexadiene (PHD), and ring-opening metathesis polymerization of norbornene following hydrogenation of the unsaturated main chain (H-PNB) with various transition metal catalysts. These polyolefins were applied to nucleating agents for isotactic polypropylene, and relationship between the structure of the polyolefins and nucleating effect was studied by DSC, polarized optical microscope, and WAXD. All the polyolefins had an effect of nucleation for isotactic polypropylene (PP). Of the polymeric nucleating agents, H-PNB showed the most effective nucleation. Addition of PCP, which was obtained with a nickel catalyst with diimine ligand, to PP induced β-modification. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 2953–2958, 2006

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