NIPPON GOMU KYOKAISHI
Print ISSN : 0029-022X
Volume 65, Issue 4
Displaying 1-9 of 9 articles from this issue
  • [in Japanese], [in Japanese], [in Japanese]
    1992 Volume 65 Issue 4 Pages 205-212
    Published: 1992
    Released on J-STAGE: July 09, 2007
    JOURNAL FREE ACCESS
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  • [in Japanese]
    1992 Volume 65 Issue 4 Pages 213-221
    Published: 1992
    Released on J-STAGE: July 09, 2007
    JOURNAL FREE ACCESS
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  • [in Japanese]
    1992 Volume 65 Issue 4 Pages 222-227
    Published: 1992
    Released on J-STAGE: July 09, 2007
    JOURNAL FREE ACCESS
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  • [in Japanese]
    1992 Volume 65 Issue 4 Pages 228-230
    Published: 1992
    Released on J-STAGE: July 09, 2007
    JOURNAL FREE ACCESS
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  • [in Japanese]
    1992 Volume 65 Issue 4 Pages 231-232
    Published: 1992
    Released on J-STAGE: July 09, 2007
    JOURNAL FREE ACCESS
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  • Takako TERADA, Kyoko HIRAOKA, Tetsuo YOKOYAMA
    1992 Volume 65 Issue 4 Pages 233-240
    Published: 1992
    Released on J-STAGE: July 09, 2007
    JOURNAL FREE ACCESS
    A series of crosslinked polyurethane (PU) ionenes were prepared for the purpose of obtaining PU with high water-absorbing power and good mechanical properties in bulk and even swollen state with water.
    PU ionenes were prepared by prepolymer method. NCO-terminated (IT) prepolymer was prepared by the reaction of the mixture of poly (oxytetramethylene) glycol (PTMG) and poly (oxyethylene) glycol (PEG) with 4, 4′-methylenebis (phenylisocyanate) at NCO/OH=2/1 (mol). Amine-terminated (AT) prepolymer was prepared by the reaction of the IT-prepolymer with 2-dimethylaminoethanol at NCO/OH=2/1 (mol). Crosslinked PU ionenes were prepared by the reaction of AT-prepolymer with N, N, N′, N′-tetramethyl-1, 6-diaminohexane (THD) and 1, 6-dibromohexane (DBH) at different molar ratios. From swelling ratio and gel fraction, PU ionenes consisting of PTMG/PEG=6/4, 7/3 and THD/DBH=1/1.5 (N+ content=2.0wt% of PU ionene repeat units) were well suited for the present purpose.
    PU ionenes were characterized by wide-angle X-ray, polarizing optical microscopy small angle light scattering, differential scanning calorimetry, dynamic mechanical properties, and stress-strain properties.
    PU ionenes synthesized in this study will be useful for many applications such as water-sealant, wet pad, water retention material and so on.
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  • Shigeru KAGAMI, Takashi AKASAKA, Atsushi HASEGAWA
    1992 Volume 65 Issue 4 Pages 241-249
    Published: 1992
    Released on J-STAGE: July 09, 2007
    JOURNAL FREE ACCESS
    Load-deflection relationship and contact pressure distribution of radial tire under the vertical loading in contacting with the roadway, are fundamental properties of pneumatic tire, which are well known as deeply related to driving performances of automobiles. Up to this time, a lot of research papers of theoretical and experimental studies on this problem has been published, however, the comprehensive relationships between the structural design data and the tire properties were not always elucidated apparently.
    In this paper, we analyzed this problem by using a spring bedded ring model consisted of belt ring and spring systems of sidewall and tread rubber, with special consideration of the marked non-linearity of radial spring constant, Kr, of the sidewall. Increasing the vertical load by a certain amount stepwisely, we calculated deformations and contact pressure distribution of a radial tire at each step, in which Kr was assumed to be constant.
    The resulted load-deflection property and the stepwise contact pressure distribution are confirmed to agree well with the experimental results, with the indication that the pressure distribution mode changes from convex to concave, with increasing the vertical load.
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  • Hiroyuki ONTSUKA, Ryuji MIYAGAYA, Syuji IMAI, Mitsuo AKIBA
    1992 Volume 65 Issue 4 Pages 250-257
    Published: 1992
    Released on J-STAGE: July 09, 2007
    JOURNAL FREE ACCESS
    Polybismuthiol was prepared by polymerization of bismuthiol which was long used as a vulcanizing agent for halogen-containing rubbers. The polybismuthiol was subjected to use for vulcanization of halogen-containing rubbers and its vulcanizing ability was compared with those of bismuthiol, trithiocyanuric acid and their derivatives. The polybismuthiol was demonstrated to be a good vulcanizing agent in terms of its anti-scorching nature and satisfactory physical property of the vulcanized rubbers.
    Furthermore, the polybismuthiol was also an excellent vulcanizing agent for blends of halogen-containing rubbers and diene rubbers.
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  • [in Japanese]
    1992 Volume 65 Issue 4 Pages 258-259
    Published: 1992
    Released on J-STAGE: July 09, 2007
    JOURNAL RESTRICTED ACCESS
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