NIPPON GOMU KYOKAISHI
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Volume 41, Issue 5
Displaying 1-8 of 8 articles from this issue
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese], [in Japanese]
    1968Volume 41Issue 5 Pages 417-421
    Published: May 15, 1968
    Released on J-STAGE: October 16, 2009
    DOIhttps://doi.org/10.2324/gomu.41.417
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1968Volume 41Issue 5 Pages 424-425
    Published: May 15, 1968
    Released on J-STAGE: October 16, 2009
    DOIhttps://doi.org/10.2324/gomu.41.424
    JOURNAL FREE ACCESS
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  • EFFECTS OF QUINONE DIOXIME ON THE PEROXIDE CURE OF ETHYLENE-PROPYLENE RUBBER
    I. EFFECTS OF ADDITIVES ON THE PEROXIDE CURE OF EPR
    M. Imoto, Y. Minoura, K. Goto, H. Harada, K. Nishihira, H. Fugita, K. ...
    1968Volume 41Issue 5 Pages 428-434
    Published: May 15, 1968
    Released on J-STAGE: October 16, 2009
    DOIhttps://doi.org/10.2324/gomu.41.428
    JOURNAL FREE ACCESS
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    In the peroxide cure of ethylene-propylene rubber, the ratio of the cross linking to the main chain scission at propylene units was measured by means of the stress relaxation method. And the effects of curing additives, such as sulfur, p-quinone dioxime and N, N'-m-phenylene bismaleimide, on the inhibition of the scission of the chain, were studied.
    It was found from the results that the extent of the main chain scission for EPDM is smaller than that for EPM, and that the abilities of various additives to inhibit the scission of the main chain were in the order of N. N'-m-phenylene bismaleimide>sulfur>p-quinone dioxime.
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  • EFFECTS OF QUINONE DIOXIME ON THE PEROXIDE CURE OF ETHYLENE-PROPYLENE RUBBER
    II. EFFECTS OF VARIOUS OXIME COMPOUNDS AS CURING ADDITIVES
    M. Imoto, Y. Minoura, K. Goto, H. Harada, K. Nishihira, H. Fugita, K. ...
    1968Volume 41Issue 5 Pages 435-441
    Published: May 15, 1968
    Released on J-STAGE: October 16, 2009
    DOIhttps://doi.org/10.2324/gomu.41.435
    JOURNAL FREE ACCESS
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    The mechanism of chemical reaction of various oxime compounds in the peroxide cure of ethylenepropylene rubber was studied. From the results, it was found that :
    (1) p-Quinone dioxime did not accelerate the decomposition of dicuniyl peroxide, but it formed crosslinking by the reaction with the polymer radicals. The structure of the crosslinking by p-quinone dioxime was different from that by dicumul peroxide alone.
    (2) p, p′-Dibenzoyl quinone dioxime which is a derivative of p-quinone dioxime produced a large amount of benzoyl radicals and caused more crosslinking than p-quinone dioxime.
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  • EFFECTS OF QUINONE DIOXIME ON THE PEROXIDE CURE OF ETHYLEN-PROPYLENE RUBBER
    III. EFFECTS OF THE VARIOUS OXIME COMPOUNDS ON THE PEROXIDE CURE OF ETHYLEN-PROPYLENE RUBBER
    M. Imoto, Y. Minoura, K. Goto, H. Harada, K. Nishihira, H. Fugita, K. ...
    1968Volume 41Issue 5 Pages 442-450
    Published: May 15, 1968
    Released on J-STAGE: October 16, 2009
    DOIhttps://doi.org/10.2324/gomu.41.442
    JOURNAL FREE ACCESS
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    The effects of various oxime compounds in the dicumyl peroxide cure of ethylene-propylene rubber were studied. From the results, it was found that :
    (1) The crosslinking density of the cured rubber increased with increase in the amount of oxime compounds, when the amount of dicumyl peroxide was limited. The effective molar ratio of the oxime compounds to dicumyl peroxide was less than about 1.0.
    (2) The crosslinking effects of p. p′-dibenzoyl quinone dioxime was greater than those of pdquinone dioxime. It seems that the crosslinking reaction proceeded with the benzoyl radicals and the oxime radicals. It seems also that the benzoyl radicals were formed by the decomposition of the p. p′-dibenzoyl quinone dioxime.
    (3) The mechanism of the chemical reaction of the oxime compunds may be explained as follows : The oxime compounds inhibit the scissions of the main chain by the reaction with the tert.-radicals formed in propylene units of ethylene-propylene rubber.
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  • [title in Japanese]
    [in Japanese]
    1968Volume 41Issue 5 Pages 451-465
    Published: May 15, 1968
    Released on J-STAGE: October 16, 2009
    DOIhttps://doi.org/10.2324/gomu.41.451
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1968Volume 41Issue 5 Pages 466-479
    Published: May 15, 1968
    Released on J-STAGE: October 16, 2009
    DOIhttps://doi.org/10.2324/gomu.41.466
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1968Volume 41Issue 5 Pages 480-481
    Published: May 15, 1968
    Released on J-STAGE: October 16, 2009
    DOIhttps://doi.org/10.2324/gomu.41.480
    JOURNAL RESTRICTED ACCESS
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