NIPPON GOMU KYOKAISHI
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Volume 56, Issue 2
Displaying 1-8 of 8 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1983 Volume 56 Issue 2 Pages 65-72
    Published: 1983
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.56.65
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1983 Volume 56 Issue 2 Pages 73-83
    Published: 1983
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.56.73
    JOURNAL FREE ACCESS
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  • STUDIES ON SCORCH RETARDER (I)
    EFFECT OF INHIBITING PREVULCANIZATION BY N-(R-THIO)-N-CYCLOHEXYLBENZOTHIAZYL-2-SULFONAMIDES IN SULFUR VULCANIZATION SYSTEM
    Hideo ODA, Masataka YASUMOTO, Masakazu MORITA, Yuji ISHINAGA
    1983 Volume 56 Issue 2 Pages 84-90
    Published: 1983
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.56.84
    JOURNAL FREE ACCESS
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    N-(R-thio)-N-cyclohexylbenzothiazyl-2-sulfonamides [I] were effective to inhibit prevulcanization in sulfur vulcanization.
    Above all, [I] (R=iso-C3H7, sec-C4H9, C6H11) were very effective as a scorch retarder.
    It was proved that a small amount of iso-PCBS (I, R=iso-C3H7) inhibits scorching in various accelerator systems. Iso-PCBS was particularly effective in controlling scorch delay with all kinds of sulfenamide accelerators without giving significant influences on cure rate or physical properties of the vulcanizates. Scorch time was longer proportionaly to the amount of iso-PCBS.
    Iso-PCBS reacts with 2-mercaptobenzothiazole, forming iso-propyldithiobenzothiazole and N-cyclohexylbenzothiazyl-2-sulfonamide (CBSA).
    Iso-PCBS reacts with morpholine, forming iso-propylthiomorpholine and CBSA.
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  • THE SCISSION OF ALLOPHANATE CROSSLINK SITES DURING THE THERMAL DETERIORATION OF PPG-TDI-PG POLYURETHANES
    Mutsuhisa FURUKAWA, Tetsuo YOKOYAMA
    1983 Volume 56 Issue 2 Pages 91-96
    Published: 1983
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.56.91
    JOURNAL FREE ACCESS
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    The thermal deterioration of PPG-TDI-PG polyurethanes was studied under N2 and air atmosphere at different temperatures ranging from 80-120°C. The method for the determination of allophanate crosslink sites in polyurethanes by the amine degradation technique was applied to the determination of the scissions of crosslink sites during the thermal deterioration of PPG-TDI-PG.
    These polyurethanes decomposed by the scissions of allophanate crosslink sites under N2 atmosphere at 120°C, while those decomposed by the scissions of both allophanate crosslink sites and main chains under air atmosphere.
    The apparent activation energy of the scissions of the allophanate crosslink sites in the polyurethanes under N2 atmosphere was 75-113kJ/mol and under air atmosphere 46-67kJ/mol.
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  • RUBBER ELASTICITY AT LARGE DEFORMATION (XIII)
    EffECT OF DEFORMATION CYCLE ON STRESS-STRAIN BEHAVIOR OF RUBBER VULCANIZATES
    Shinji INAGAKI, Yukio ONOUCHI, Hiroshi OKAMOTO, Junji FURUKAWA
    1983 Volume 56 Issue 2 Pages 97-102
    Published: 1983
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.56.97
    JOURNAL FREE ACCESS
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    The deformation curves of rubber vulcanizates pictured by repeating hysteresis loops were analyzed by our proposed equation of rubber elasticity and Mooney-Rivlin one. In these parameters obtained by plots of both equation vkT and c1 were observed to be increased and b and c2 decreased, when a number of deformation are increased.
    In the case of the measuring of the deformation curves, when the samples are permitted to stand for a constant time at room temperature, the values of these parameters approached gradually to that of original non-deformation sample.
    From these results, it can be considered that b and c2 are parameters based on a non-elastic effect, or pseudo-crosslinking.
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  • [title in Japanese]
    James Lindsay White, [in Japanese]
    1983 Volume 56 Issue 2 Pages 103-122
    Published: 1983
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.56.103
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1983 Volume 56 Issue 2 Pages 123-125
    Published: 1983
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.56.123
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1983 Volume 56 Issue 2 Pages 126-127
    Published: 1983
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.56.126
    JOURNAL RESTRICTED ACCESS
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