Rheological Properties of Some Thermoplastic Elastomers

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  • Sato Kyoko
    Department of Polymer Science and Engineering, Yamagata University The Inctec Inc., Technical Center
  • Aoki Yuji
    Mitsubishi Chemical Corporation, Polymer Solution Center
  • Sugimoto Masataka
    Department of Polymer Science and Engineering, Yamagata University
  • Koyama Kiyohito
    Department of Polymer Science and Engineering, Yamagata University

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Other Title
  • 数種の熱可塑性エラストマーのレオロジー的性質
  • スウシュ ノ ネツ カソセイ エラストマー ノ レオロジーテキ セイシツ

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Abstract

We studied the characteristics of some thermoplastic elastomers (TPEs) using measurements of the temperature dispersion of the complex tensile modulus in the solid state, and the dynamic viscoelasticity and elongational viscosity in the molten state. The TPE samples included PVC/plasticizer-type TPEs and polymer alloy-type TPEs. The storage and loss shear moduli, G′ and G″, exhibited a power-law dependence on the angular frequency ω for most of the TPE samples measured. These findings indicate that these TPEs have long time relaxation mechanisms due to a self-similar fractal-like structure. The elongational viscosity behavior was different between the PVC/plasticizer-type TPEs and polymer alloy-type TPEs. The PVC/plasticizer-type TPEs exhibited strong strain hardening, while the other TPEs did not show any strain hardening. This difference is attributed to the morphology in these TPEs.

Journal

  • Seikei-Kakou

    Seikei-Kakou 18 (6), 421-426, 2006-06-20

    The Japan Society of Polymer Processing

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