NIPPON GOMU KYOKAISHI
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Volume 77, Issue 7
Displaying 1-14 of 14 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    2004 Volume 77 Issue 7 Pages 229
    Published: 2004
    Released on J-STAGE: May 28, 2007
    DOIhttps://doi.org/10.2324/gomu.77.229
    JOURNAL FREE ACCESS
    Download PDF (195K)
  • [title in Japanese]
    [in Japanese]
    2004 Volume 77 Issue 7 Pages 230
    Published: 2004
    Released on J-STAGE: May 28, 2007
    DOIhttps://doi.org/10.2324/gomu.77.230
    JOURNAL FREE ACCESS
    Download PDF (224K)
  • [title in Japanese]
    [in Japanese]
    2004 Volume 77 Issue 7 Pages 231
    Published: 2004
    Released on J-STAGE: May 28, 2007
    DOIhttps://doi.org/10.2324/gomu.77.231
    JOURNAL FREE ACCESS
    Download PDF (172K)
  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese], [in Japanese]
    2004 Volume 77 Issue 7 Pages 232
    Published: 2004
    Released on J-STAGE: May 28, 2007
    DOIhttps://doi.org/10.2324/gomu.77.232
    JOURNAL FREE ACCESS
    Download PDF (237K)
  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
    2004 Volume 77 Issue 7 Pages 233
    Published: 2004
    Released on J-STAGE: May 28, 2007
    DOIhttps://doi.org/10.2324/gomu.77.233
    JOURNAL FREE ACCESS
    Download PDF (280K)
  • [title in Japanese]
    [in Japanese]
    2004 Volume 77 Issue 7 Pages 234
    Published: 2004
    Released on J-STAGE: May 28, 2007
    DOIhttps://doi.org/10.2324/gomu.77.234
    JOURNAL FREE ACCESS
    Download PDF (162K)
  • [title in Japanese]
    [in Japanese]
    2004 Volume 77 Issue 7 Pages 235
    Published: 2004
    Released on J-STAGE: May 28, 2007
    DOIhttps://doi.org/10.2324/gomu.77.235
    JOURNAL FREE ACCESS
    Download PDF (171K)
  • [title in Japanese]
    [in Japanese]
    2004 Volume 77 Issue 7 Pages 236
    Published: 2004
    Released on J-STAGE: May 28, 2007
    DOIhttps://doi.org/10.2324/gomu.77.236
    JOURNAL FREE ACCESS
    Download PDF (170K)
  • [title in Japanese]
    [in Japanese]
    2004 Volume 77 Issue 7 Pages 237
    Published: 2004
    Released on J-STAGE: May 28, 2007
    DOIhttps://doi.org/10.2324/gomu.77.237
    JOURNAL FREE ACCESS
    Download PDF (192K)
  • Studies on Structures and Properties of Organoclay/Thermoplastic Elastomer Composites, Part 2.
    Preparation and Mechanical Properties of SBS Composites Using Organoclay Treated with Stearic Acid
    Tomohiro YAMAGUCHI, Eisuke YAMADA
    2004 Volume 77 Issue 7 Pages 238-243
    Published: 2004
    Released on J-STAGE: May 28, 2007
    DOIhttps://doi.org/10.2324/gomu.77.238
    JOURNAL FREE ACCESS
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    Polystyrene-block-polybutadiene-block-polystyrene (SBS) composites were prepared using organoclay (stearyl ammonium-modified montmollironite, C18-Mt) treated with stearic acid (SA) by the melt-mixing method. In SBS composites using C18-Mt treated with SA (C18-Mt(SA)/SBS composites), the particles of C18-Mt(SA) became smaller and were dispersed more uniformly with increasing the treating amount of SA to C18-Mt. The tensile modulus, the hardness and the tear strength of C18-Mt(SA)/SBS composites were superior to those of SBS composite with untreated C18-Mt (C18-Mt/SBS composite). For example, tear strength of 10wt% C18-Mt(SA)/SBS composite was 2.0 times higher compared to that of pure SBS, when the treating amount of SA to C18-Mt was 0.05 (weight ratio). The tensile strength and the elongation of C18-Mt(SA)/SBS composites were improved compared with those of C18-Mt/SBS composite. It was found that the treatment of C18-Mt with SA was useful to improve the mechanical properties and the dispersion of C18-Mt/SBS composite.
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  • Characterization of Adhesion Interlayer between Rubber and Brass by a Novel Method of Sample Preparation, Part. 2.
    SEM-EDX Analysis of Adhesion Interlayer by Exposing Reaction Layer Using Filter
    Takeshi HOTAKA, Yasuhiro ISHIKAWA, Kunio MORI
    2004 Volume 77 Issue 7 Pages 244-249
    Published: 2004
    Released on J-STAGE: May 28, 2007
    DOIhttps://doi.org/10.2324/gomu.77.244
    JOURNAL FREE ACCESS
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    We have previously succeeded in analyzing a clean adhesion interface by XPS utilizing a specific sample preparation of composite in which a filter paper was inserted between rubber and brass during the vulcanization. In this study, morphology of the interlayer was examined by SEM-EDX, in addition to the characterization of elemental distribution.
    Cu2S was found to be spherical at the interface for unaged specimens. Since Cu2S tended to corrupt gradually by an emission of electron beam during the SEM analysis, Cu2S was assumed to be amorphous.
    From the specimen aged under a humid environment, morphology of the Cu2S was found to be ragged crystalline. SEM image revealed that Cu2S did not corrupt during the emission of electron beam, which suggests the change in morphology from soft amorphous to rigid crystalline during the aging under humid conditions. Crystallization of Cu2S may lower the adhesion strength owing to decreased surface area and increased brittleness of the interfacial structure.
    ZnO tended to grow at the interface in the specimen aged with hot water. ZnO was found to occur during the aging in hot water by dezincification with moisture along with the migration from rubber matrix.
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  • Fundamentals and Mechanical Properties of PSA Tapes
    5. Evaluation of the Contact Process by Measuring the Tack
    Yoshiaki URAHAMA
    2004 Volume 77 Issue 7 Pages 250-254
    Published: 2004
    Released on J-STAGE: May 28, 2007
    DOIhttps://doi.org/10.2324/gomu.77.250
    JOURNAL FREE ACCESS
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    Wettability and fluidity are important factors in pressure sensitive adhesive properties, particularly in tack. Generally, the tack is being investigated from interface chemistry and rheology. In this paper, we have tried an approach to the tack from a new analysis in a phenomenon aspect. We have studied the tack from time spectra in rolling-ball tack and probe tack, and discussed the new analysis of tack. From the investigations, it becomes clear that dwell time and dead weight are the independent factors to each other to the tack. So, the following tack equation is formulated.
    T=T00+αP+T01{1-exp(-t/τ1)}+T02{1-exp(-t/τ2)}+T03{1-exp(-t/τ3)}
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  • [title in Japanese]
    [in Japanese]
    2004 Volume 77 Issue 7 Pages 255-260
    Published: 2004
    Released on J-STAGE: May 28, 2007
    DOIhttps://doi.org/10.2324/gomu.77.255
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    2004 Volume 77 Issue 7 Pages 261-264
    Published: 2004
    Released on J-STAGE: May 28, 2007
    DOIhttps://doi.org/10.2324/gomu.77.261
    JOURNAL FREE ACCESS
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