NIPPON GOMU KYOKAISHI
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Volume 83, Issue 12
Displaying 1-5 of 5 articles from this issue
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Regular Papers
  • Material Dependence in Direct Adhesion of Halogen-containing Rubber to Resins During Curing Using Molecular Adhesives
    Hidetoshi HIRAHARA, Katsuhito MORI, Yusuke MATSUNO, Takahiro KUDO, Eii ...
    2010 Volume 83 Issue 12 Pages 383-389
    Published: 2010
    Released on J-STAGE: June 07, 2011
    DOIhttps://doi.org/10.2324/gomu.83.383
    JOURNAL FREE ACCESS
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    Various resins (adherends) were treated with a corona discharge apparatus to give OH groups on the surfaces. The reaction of obtained OH group-linked resins and 6-triethoxysilylpropylamino-1,3,5-triazine-2,4-ditiol (TES) produced TES-linked resins. Direct adhesions of halogen-containing rubbers (adhesives) to TES-linked resins during curing were investigated for the material dependence on adherends and adhesives, and reacting points and their concentration in the adhesives. Other than direct adhesion of halogen-containing rubbers with high reactive curing agents and low concentration of reactive points and TES linked resins, the adhesion products of various resins and halogen-containing rubbers indicated high peel strength and 100% rubber coverage. The results indicate that rubber materials are independent on resin materials in the direct adhesion. In the direct adhesion of halogen-containing rubbers to various TES-linked resins during curing, resin types had no sufficient effect on peel strength and rubber coverage expected for PP. The direct adhesion of PP and halogen-containing rubbers gave low peel strength and rubber coverage because PP is given with low OH group concentration by corona discharge treatment. When chemical bond concentration at interfacial layer is constant, peel strength decreased with an increase in network chain concentration. The phenomenon is explained by the stress dispersion, which relates to the elastic modulus of valucanizates.
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  • Structure Analyses of Swollen Rubber-carbon Black Systems by Contrast Variation SANS
    Mikihito TAKENAKA, Shotaro NISHITSUJI, Sumiaki FUJII, Naoya AMINO, Yas ...
    2010 Volume 83 Issue 12 Pages 390-394
    Published: 2010
    Released on J-STAGE: June 07, 2011
    DOIhttps://doi.org/10.2324/gomu.83.390
    JOURNAL FREE ACCESS
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    The polymer layers adsorbed on carbon black (CB) aggregates in rubber/CB systems have been investigated with contrast variation small-angle neutron scattering (SANS) method. Specimens were swollen by toluene/deuterated toluene solvents having various scattering length densities and their scattering intensities were measured with SANS. The contrast variation SANS for the specimens yielded partial scattering functions: the scattering function for polymer-polymer correlation Spp(q), the scattering function for CB- CB correlation Scc(q), and the scattering function for polymer- CB correlation Spc(q). The analyses of the partial scattering functions explored the existence of dense polymer layers around CB aggregates. Several characteristic parameters are estimated from the analyses, such as the size of aggregates, the thickness of layers, and the volume fractions of polymer of layers and matrix.
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General Review as an Addition to Special Issue for General Reviews “The prospects of nanocarbon materials as a filler” (Vol. 83, No. 11)
  • Current and Future of Anode Materials for Li-ion Battery
    Seong-Ho YOON, Jin MIYAWAKI, Isao MOCHIDA
    2010 Volume 83 Issue 12 Pages 395-400
    Published: 2010
    Released on J-STAGE: June 07, 2011
    DOIhttps://doi.org/10.2324/gomu.83.395
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    A variety of carbon materials provide a series of unique properties, reflecting their nano, micro and macro structures. Controlled production of their nano structure, size and shape is a key technology to prepare the optimum material of unique properties. Thus, a variety of carbons and their composites of various bulk structures, shapes, sizes, and surface areas have been produced to apply for the battery application. In this paper, carbons and their composites as effective anode materials for Li-ion battery are reviewed based on the nano-structural analyses. Systematic examinations of carbon materials with unique nano structure can provide promising chances of improving the optimum performance toward particular application, enhancing their excellent performances.
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General Reviews
  • Changes in the Network Structure of Vulcanizates During Tensile Deformation
    Masayoshi ITO
    2010 Volume 83 Issue 12 Pages 401-406
    Published: 2010
    Released on J-STAGE: June 07, 2011
    DOIhttps://doi.org/10.2324/gomu.83.401
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    Electron spin resonance (ESR) is a powerful technique to study the mechanochemical reactions in deformed polymeric materials including elastomers.
    This review gives results of ESR measurements of vulcanizates under tensile deformation. The measurements were carried out by the combination of home-built stretching machine with commercially available ESR spectrometer. The destruction and re-combination of crosslinking structure developed in the vulcanizates were confirmed by the changes of radical concentration during tensile deformation. Further, the degree of strain induced crystallization in vulcaniates was correlated with the partial breakdown of network structure in the vulcanizates.
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Technical Note
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