NIPPON GOMU KYOKAISHI
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Volume 54, Issue 1
Displaying 1-11 of 11 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1981 Volume 54 Issue 1 Pages 1
    Published: 1981
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.54.1
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1981 Volume 54 Issue 1 Pages 2
    Published: 1981
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.54.2
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1981 Volume 54 Issue 1 Pages 3-19
    Published: 1981
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.54.3
    JOURNAL FREE ACCESS
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  • Erratum
    1981 Volume 54 Issue 1 Pages 19
    Published: 1981
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.54.1_19
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1981 Volume 54 Issue 1 Pages 20-28
    Published: 1981
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.54.20
    JOURNAL FREE ACCESS
    Download PDF (658K)
  • [title in Japanese]
    [in Japanese]
    1981 Volume 54 Issue 1 Pages 29-32
    Published: 1981
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.54.29
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1981 Volume 54 Issue 1 Pages 33-38
    Published: 1981
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.54.33
    JOURNAL FREE ACCESS
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  • EVALUATION OF THE PLASTICITY OF FILLED RUBBER MATERIALS BY A PENETRATION METHOD
    RAPID AND HIGH RESOLVABLE METHOD FOR THE MEASUREMENTS OF PLASTICITY AND ITS INHOMOGENEITY OF RUBBER MATERIALS, (II)
    Takae KUSANO, Kenkichi MURAKAMI, Akihiro ITOH, Naoki SAKAKIBARA, Toshi ...
    1981 Volume 54 Issue 1 Pages 39-46
    Published: 1981
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.54.39
    JOURNAL FREE ACCESS
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    In this study, the applicability of the PW method to filled rubber materials were examined.
    A plot of PW value vs. Mooney viscosity shows a good straight line in analogy with that of unfilled rubber materials.
    Similarly, the PW values are influenced by the penetrating rates. They are highly resolved at lower penetrating rate and even the slightest difference in platicity can be recognized. This is associated with the stress relaxation behavior of the materials strained by the needle surface.
    Plots of log PW for unfilled materials and 1/PW for filled one vs. temperature give straight lines. These dependences of PW value on temperature are useful for the reduction of PW values from temperatures.
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  • CONSTRUCTION OF A PLASTOMETER EMPLOYING PENETRATION TECHNIQUE
    RAPID AND HIGH RESOLVABLE METHOD FOR THE MEASUREMENTS OF PLASTICITY AND ITS INHOMOGENEITY OF RUBBER MATERIALS, (III)
    Naoki SAKAKIBARA, Tsutomu YAMAKAWA, Toshio OMACHI, Takae KUSANO, Kenki ...
    1981 Volume 54 Issue 1 Pages 47-52
    Published: 1981
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.54.47
    JOURNAL FREE ACCESS
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    In order to measure the plasticity of rubberlike materials, an apparatus which can be used on-line with a process was constructed. The plasticity measurement is carried out by inserting a needle at a constant penetrating rate into rubber materials.
    Integration of the penetrating stress against the penetration depth, which is obtained by an integration circuit, gives the plasticity value, PW. The reproducibility of the degree of plasticity by the apparatus was
    well. The construction and the block diagram of this apparatus are shown.
    Reference is made to the normalized condition of the PW measurement.
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  • STUDY ON FAILURE MECHANISM OF RUBBER VULCANIZATES (XIV)
    FATIGUE PROCESS (PART VI), CRITICAL STRESS AND STRAIN IN FATIGUE FAILURE OF RUBBER VULCANIZATES
    Kunihiko FUJIMOTO, Tetsuhiko MIGITA, Koya SUZUKI
    1981 Volume 54 Issue 1 Pages 53-59
    Published: 1981
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.54.53
    JOURNAL FREE ACCESS
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    Stress and strain at fatigue failure of carbon black filled SBR and NR vulcanizates have been examined for various loading conditions.
    For SBR systems, stress and strain for fatigue failure resemble for the failure envelope of the vulcanizates at various temperatures and the fatigue life is not much affected by the lower stress or the static stress. However, for NR system, stress and strain for fatigue deviates from those for the failure envelope and the fatigue life is highly dependent on the lower stress or the static stress.
    To interpret these data the higher order structure of the sample is assumed to affect the conditions for the unstable fracture of the system. Namely, one part of the higher order structure may be transformed to more randomized structure with increase in entropy and the other part may be transformed to more ordered or oriented structure with decrease in energy. The fatigue failure may be dominated by the overall structure of the system.
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  • [title in Japanese]
    1981 Volume 54 Issue 1 Pages 60-61
    Published: 1981
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.54.60
    JOURNAL RESTRICTED ACCESS
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