NIPPON GOMU KYOKAISHI
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Volume 53, Issue 10
Displaying 1-8 of 8 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1980Volume 53Issue 10 Pages 585-599
    Published: 1980
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.53.10_585
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1980Volume 53Issue 10 Pages 600-606
    Published: 1980
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.53.10_600
    JOURNAL FREE ACCESS
    Download PDF (600K)
  • [title in Japanese]
    [in Japanese]
    1980Volume 53Issue 10 Pages 607-616
    Published: 1980
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.53.10_607
    JOURNAL FREE ACCESS
    Download PDF (947K)
  • [title in Japanese]
    [in Japanese]
    1980Volume 53Issue 10 Pages 617-624
    Published: 1980
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.53.10_617
    JOURNAL FREE ACCESS
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  • STUDIES ON MACROMOLECULAR ANTIOXIDANTS (I)
    PREPARATION OF MACROMOLECULAR ANTIOXIDANTS FROM HYDROXY-TERMINATED LIQUID POLYBUTADIENE
    Yuji MINOURA, Yoshitomo YAMAMOTO, Taizo SAKOH, Shigemitsu OHTOMO, Kats ...
    1980Volume 53Issue 10 Pages 625-630
    Published: 1980
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.53.10_625
    JOURNAL FREE ACCESS
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    Macromolecular antioxidants were prepared from hydroxyterminated liquid polybutadiene and antioxidants containing aromatic amino groups by a condensation reaction using ZnCl2 or BF3 etherate as catalyst. Diphenylamine, N-phenyl-β-naphthlamine, N, N′-diphenyl-p-phenylenediamine, N-phenyl-N′- isopropyl-p-phenylenediamine, and 2, 2, 4-trimethyl-1, 2-dihydroquinoline showed 87-96% conversion of the liquid polybutadiene into macromolecular antioxidants. However, N, N′-dioctyl-p-phenylenediamine and p-aminodiphenylamine showed unsatisfactory results. A thermogravimetric analysis showed the non- volatility of the macromolecular antioxidants.
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  • STUDIES ON MACROMOLECULAR ANTIOXIDANTS (II)
    EVALUATION OF MACROMOLECULAR ANTIOXIDANTS OBTAINED FROM HYDROXY-TERMINATED POLYBUTADIENE
    Yuji MINOURA, Yusuke SAKURAMOTO, Yoshitomo YAMAMOTO, Masaki OHARA, Tai ...
    1980Volume 53Issue 10 Pages 631-639
    Published: 1980
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.53.10_631
    JOURNAL FREE ACCESS
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    Effect of the macromolecular antioxidants obtained from hydroxy-terminated liquid polybutadiene and antioxidants containing aromatic amino groups on the thermal stability of vulcanized styrene-butadiene rubber (SBR) was investigated. The thermal stability of SBR vulcanizate was significantly improved by the macromolecular antioxidants when compared with the use of ordinary commercial antioxidants. The result was explained by assuming the formation of chemical bonds between the macromolecular antioxidants and vulcanized rubber during the vulcanization process. In addition, the macromolecular antioxidants were found to decrease the viscosity of rubbers in the course of processing.
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  • STUDIES ON STRUCTURE AND PHYSICAL PROPERTIES OF VULCANIZATES CONTAINING COMMINUTED VULCANIZATES
    (III) THEORY OF ZERO DIMENSIONAL MODEL OF TRANSFER AND REACTION OF SULFUR IN VULCANIZATES CONTAINING COMMINUTED VULCANIZATES
    Kunihiko FUJIMOTO, Toshio NISHI
    1980Volume 53Issue 10 Pages 640-644
    Published: 1980
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.53.10_640
    JOURNAL FREE ACCESS
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    Discontinuity of crosslink density or sulfur concentration is formed in rubber matrix and comminuted vulcanizates due to redistribution of sulfur by chemical reaction and diffusion in each phase during cure. The situation has been analysed using a zero dimensional model taking into account the solubility, diffusion, and crosslink reaction of sulfur in comminuted and matrix rubber.
    The crosslink desnity or sulfur concentration in the rubber matrix and comminuted vulcanizates is highly dependent on the crosslink reaction speed and distribution coefficient of sulfur in each phase according to the zero dimensional model. Their effect on the crosslink density in each phase is calculated to be equivalent.
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  • [title in Japanese]
    [in Japanese]
    1980Volume 53Issue 10 Pages 645-646
    Published: 1980
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.53.10_645
    JOURNAL RESTRICTED ACCESS
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