NIPPON GOMU KYOKAISHI
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Volume 73, Issue 9
Displaying 1-9 of 9 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    2000 Volume 73 Issue 9 Pages 469-475
    Published: 2000
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.73.469
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    2000 Volume 73 Issue 9 Pages 476-479
    Published: 2000
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.73.476
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    2000 Volume 73 Issue 9 Pages 480-487
    Published: 2000
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.73.480
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    2000 Volume 73 Issue 9 Pages 488-493
    Published: 2000
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.73.488
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    2000 Volume 73 Issue 9 Pages 494-495
    Published: 2000
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.73.494
    JOURNAL FREE ACCESS
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  • Rubber Reinforcement by Carbonized Chaff Powder
    Yoshihiro YAMASHITA, Sueo KAWABATA, Nobuo NAGAOKA
    2000 Volume 73 Issue 9 Pages 496-502
    Published: 2000
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.73.496
    JOURNAL FREE ACCESS
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    We examined the effectiveness of the powdered charcoal made from rice chaff as a reinforcement material of rubber. There are few reports that describing the use of carbonized chaff as a reinforcement of rubber. We found that this carbonized chaff manifested a reinforcing effect almost equivalent to that of carbon black, if a silane coupling was applied. The particle size of the carbonized chaff was about 1μm, although some particles with a size of 20-30μm were produced by the usual crushing method. This may be a reason why the breaking strength of the carbonized chaff reinforced rubber was a little weaker than that of the carbon black reinforced rubber. However, if silane coupling processing was applied, the strength of carbonized chaff rubber became the same as that of talc and clay reinforced rubber.
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  • Controlling of Higher Order Structure and Friction/Abrasion of Polyurethane by Surface Modification, Part 2.
    Surface Modification of Polyurethane Elastomers by Polymeric MDI
    Mutsuhisa FURUKAWA, Takahiko OKAZAKI, Tetsuro SHIIBA
    2000 Volume 73 Issue 9 Pages 503-510
    Published: 2000
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.73.503
    JOURNAL FREE ACCESS
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    Surface layer of Polyurethane elastomers (PUEs) was modified by the use of polymeric isocyanate (PMDI). PUEs were prepared from poly (oxytetrametylene) glycol (PTMG, Mn=2037), or poly(ethylene adipate) glycol (PEA, Mn=2015), 4, 4′-diphenyl methane diisocyanate (MDI), and 1, 4-butane diol (BD)/trimethylol propane (TMP). PMDI was penetrated into the surface layer of PUEs and reacted with methanol and fluoro alchol. Morphology, friction and abrasion characterization of the modified PUEs were studied by means of FT-IR, polarizing microscope, Heidon friction tester and DIN abrasion tester. The modified PUEs exhibited lower friction coefficient and higher abrasion resistance compared with the unmodified PUE.
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  • Static and Fatigue Shear Characteristics of Rubber-Metal Laminated Bearings Partially Using High Tearing Rubber at Their Edge under Compression
    Kazuya Okubo, Susumu Kuroda, Toru Fujii
    2000 Volume 73 Issue 9 Pages 511-517
    Published: 2000
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.73.511
    JOURNAL FREE ACCESS
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    The effect of the partial use of high tearing strength rubber at the edge of rubber-metal laminated bearings was examined. The static or cyclic fatigue shear loads were applied to the circular rubber bearing subjected to compressive load at room temperature. The specimens having a chambered edge at the laminating steel plates were also used.
    The crack initiation was significantly delayed due to the use of high tearing strength rubber under static load, regardless of the edge shape of the steel plates and compressive load. For conventional rubber-metal laminated bearings fabricated by one kind of rubber, the edge shape affected the nominal shear strain at crack initiation in case of static low compression.
    The shear modulus of the specimens with high tearing strength rubber under cyclic loading was slightly lower than that of conventional one. The visco-elastic tangential loss at 5Hz vibration was slightly decreased with an increase of the number of cyclic loading. This change was not related with the material and the magnitude of compressive load. The tangential loss for the specimen with high tearing strength rubber was larger than that of conventional one, and was affected by the compressive load at high frequencies (10Hz and 20Hz).
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  • [title in Japanese]
    [in Japanese]
    2000 Volume 73 Issue 9 Pages 520-521
    Published: 2000
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.73.520
    JOURNAL RESTRICTED ACCESS
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