NIPPON GOMU KYOKAISHI
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Volume 62, Issue 11
Displaying 1-7 of 7 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1989 Volume 62 Issue 11 Pages 683-694
    Published: 1989
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.62.683
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1989 Volume 62 Issue 11 Pages 695-706
    Published: 1989
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.62.695
    JOURNAL FREE ACCESS
    Download PDF (819K)
  • [title in Japanese]
    [in Japanese]
    1989 Volume 62 Issue 11 Pages 707-716
    Published: 1989
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.62.707
    JOURNAL FREE ACCESS
    Download PDF (677K)
  • [title in Japanese]
    [in Japanese]
    1989 Volume 62 Issue 11 Pages 717-718
    Published: 1989
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.62.717
    JOURNAL FREE ACCESS
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  • MECHANOCHEMICAL REACTION BETWEEN VINYL FUNCTIONAL POLYSILOXANE AND EVA
    Akitaka SENUMA, Junichi HAKOZAKI, Toshiyuki NAGAI, Akio HAYASHI, Kirok ...
    1989 Volume 62 Issue 11 Pages 719-725
    Published: 1989
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.62.719
    JOURNAL FREE ACCESS
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    The torque rise was observed by the mechanical mixing of vinyl functional polysiloxane (WGS) and EVA by heating, while not for the mixing of dimethylpolysiloxane and EVA, and also of WSG and polyethylene by the same conditions. And it was considered that the mechanochemical reaction between WGS and EVA occured. The reacted material had the extrudability in spite of its high gel content insoluble in chloroform. From the results of the viscoelastic measurement and FTIR measurement, it was concluded that it formed the phase separation structure in which polysiloxane and EVA composed discontinuous and continuous phase, respectively, and that almost of polysiloxane crosslinked each other, and that the crosslinking occured between some EVA and polysiloxane. It was considered to form like as “Pseudo-Interpenetrating network”, proposed by Arkles et al, which had extrudability in spite of high polysiloxane network content.
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  • STUDIES ON RELATIONSHIP BETWEEN PARTICLES DISPERSED STRUCTURE AND PROPERTIES OF PARTICLES FILLED VULCANIZATES (3)
    STUDIES ON DEPENDENCE OF ELONGATION FATIGUE LIFE ON PARTICLES CONCENTRATION
    Kunihiko FUJIMOTO, Naoto MIFUNE, Hiroyuki TAKAHARA
    1989 Volume 62 Issue 11 Pages 726-735
    Published: 1989
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.62.726
    JOURNAL FREE ACCESS
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    In this paper, we study dependence of the elongation fatigue life of carbon black filled SBR vulcanizates on particles concentration by using a phase transition model of a particles dispersed structure, a complex reaction model of fatigue fracture, normalized fatigue life equations and Griffith's brittle fracture equation. We show that the dependence of life curve on particles concentration has maximum value at the phase transition point of the particles dispersed structure and deduce the following equation,
    tb=C•Km•τb(Vf)
    =C•Km•εb(Vf)/v
    where τb (Vf) and εb (Vf) are fracture time and elongation at break for particles volume fraction Vf, K is stress ratio, v is strain speed, C and m are constants. And particles volume fraction at maximum life agrees with the turning points of dependence on particles concentration of entropic modulus ratio, static modulus, fracture strain and fracture time. In addition, the dependence of tensile strength on particles concentration corresponds to that of entropic stress and has maximum value for the same volume fraction of particles. And so the turning point of dependence of life is different from that of tensile strength.
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  • [title in Japanese]
    1989 Volume 62 Issue 11 Pages 738-739
    Published: 1989
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.62.738
    JOURNAL RESTRICTED ACCESS
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