Thermal Deterioration of Thick PPDI-based Polyurethanes.

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  • KASAZAKI Toshiaki
    Department of Materials Science, Graduate School of Science and Technology, Nagasaki University Institute of Narayama, Nitta Co. Ltd.
  • HANADA Hiroaki
    Department of Materials Science, Graduate School of Science and Technology, Nagasaki University
  • SUZUKI Makoto
    Institute of Narayama, Nitta Co. Ltd.
  • FURUKAWA Mutsuhisa
    Department of Materials Science, Graduate School of Science and Technology, Nagasaki University

Bibliographic Information

Other Title
  • 肉厚ＰＰＤＩ系ポリウレタンエラストマーの熱劣化挙動
  • ニクアツ PPDIケイ ポリウレタン エラストマー ノ ネツ レッカ キョドウ

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Description

Thermal deterioration behaviors of the thick cylindrical polyurethanes were analyzed from the surface of samples to the inside. The polyurethanes were prepared from p-phenylene diisocyanate(PPDI), poly(hexamethylene carbonate) glycol(PHC), and chain-extenders which were 1, 4-butanediol (BD), 2, 2', 3, 3'-tetrachloro-4, 4'-diamino-diphenylmethane (TCDAM) and hydroquinone bis-2-hydroxyethyl ether(HQEE). Thermal deterioration behaviors of the polyurethanes aged at 150°C during 2 months were measured using Infra Red spectroscopy, dynamic viscoelastometer, DSC, and WAXS. While scission of allophanate crosslinkages and a little degree of micro-phase mixing occurred simultaneously in region of the surface of the samples, the micro-phase separation in the inside region was promoted by an annealing effect and reversible scission of allophanate crosslinkages. These behaviors depended on rigidity of hard segments.

Journal

  • NIPPON GOMU KYOKAISHI

    NIPPON GOMU KYOKAISHI 75 (11), 476-481, 2002

    THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN

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