NIPPON GOMU KYOKAISHI
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Volume 42, Issue 11
Displaying 1-10 of 10 articles from this issue
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  • THE EFFECTS OF C=C UNSATURATED COMPOUNDS ON THE PEROXIDE CURE OF EPDM AND EPM
    VII THE RELATIONSHIPS BETWEEN THE PHYSICAL PROPERTIES AND THE RATIONS OF POLYMER/MONOMER
    M. Imoto, Y. Minoura, K. Goto, H. Harada, K. Nishihira, H. Fujita, K. ...
    1969 Volume 42 Issue 11 Pages 921-929
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.921
    JOURNAL FREE ACCESS
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    Blends of various polymers and vinyl monomers were cured in the presence of dicumylperoxide. The relationships between the properties and the ratios of polymer/vinyl monomer were studied. Used polymers were EPDM, EPM, EVAc, BR and IR, and vinyl monomers were tridecylmethacrylate (TDMA), ethyleneglycoldimethacrylate (EGDMA), trimethylolpropane-trimethacrylate (TPTMA) and mixed monomers (TDMA/EGDMA, TDMA/TPTMA).
    The vulcanizates of EPDM/TDMA (50/50) blends in the presence of dicumylperoxide were fractionated by the solvent extraction, and the compositions were indentified by the infrared spectra. Above data showed that the graft polymerization and homopolymerization of vinyl monomer occurred simultaneously during the peroxide cure of the polymer-vinyl monomer blend.
    The phase-contrast microscopic study revealed that the blend of polymer with vinyl monomer had better state of dispersion than the blend of polymer with corresponding vinyl polymer.
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  • DYNAMIC MECHANICAL PROPERTIES OF CROSSLINKED RUBBER
    I LINEAR AND NONLINEAR VIBRATION CHARACTERISTICS OF MOUNTING RUBBERS
    K. Nakashima
    1969 Volume 42 Issue 11 Pages 930-936
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.930
    JOURNAL FREE ACCESS
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    One of the most distinctive characteristics of the vibration of mounting rubbers is a dependence of the dynamic mechanical properties upon the amplitude. For an unloaded polybutadiene, these effects are so small that the experimental response curves agree well with the theoretical curves calculated using a linear equation.
    However, nonlinear vibration characteristics of butyl rubber and polybutadiene loaded with carbon black are so pronounced that the linear equation can not be applied.
    Thus theoretical response curves were calculated using a nonlinear equation whose nonlinear term was given by (kx-βx3). The results show that the theoretical response curves and free vibration curves obtained from the nonlinear equation for butyl rubber are in good agreement with the experimental results, and the value of β increases with an increasing proportion of carbon black. It was also found for unloaded rubber that tan δ obtained from impact resilience agreed well with tan δ obtained from sinusoidal test.
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  • [title in Japanese]
    [in Japanese]
    1969 Volume 42 Issue 11 Pages 937-942
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.937
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1969 Volume 42 Issue 11 Pages 943-951
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.943
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1969 Volume 42 Issue 11 Pages 952-956
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.952
    JOURNAL FREE ACCESS
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  • Erratum
    1969 Volume 42 Issue 11 Pages 956
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.11_956
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1969 Volume 42 Issue 11 Pages 957-966
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.957
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese]
    1969 Volume 42 Issue 11 Pages 967-978
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.967
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1969 Volume 42 Issue 11 Pages 979-993
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.979
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1969 Volume 42 Issue 11 Pages 1002-1003
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.1002
    JOURNAL RESTRICTED ACCESS
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