NIPPON GOMU KYOKAISHI
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Volume 57, Issue 6
Displaying 1-7 of 7 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1984 Volume 57 Issue 6 Pages 345-349
    Published: 1984
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.57.345
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1984 Volume 57 Issue 6 Pages 350-358
    Published: 1984
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.57.350
    JOURNAL FREE ACCESS
    Download PDF (1170K)
  • [title in Japanese]
    [in Japanese]
    1984 Volume 57 Issue 6 Pages 359-369
    Published: 1984
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.57.359
    JOURNAL FREE ACCESS
    Download PDF (700K)
  • [title in Japanese]
    [in Japanese]
    1984 Volume 57 Issue 6 Pages 370-375
    Published: 1984
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.57.370
    JOURNAL FREE ACCESS
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  • STUDY ON VULCANIZING ADHESION OF EPDM I. VULCANIZNG ADHESION MECHANISM OF EPDM TO BRASS PLATES TREATED WITH TRIAZINE THIOLS
    Kunio Mori, Mitsuru Shida, Yoshiro Nakamura, Isao Nishiwaki
    1984 Volume 57 Issue 6 Pages 376-384
    Published: 1984
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.57.376
    JOURNAL FREE ACCESS
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    Vulcanizing adhesion of ethylene-propylene terpolymer (EPDM) to brass plates treated with triazine thiols was investigated for the physical and chemical properties of a film formed on the surface of the plates, treating conditions of the surface, the reaction of the film with EPDM, and the heat treatment effect of the adherends. The film which formed on the brass plates after surface treatment with triazine trithiol had a thick more than 300Å, and involved functional groups such as a SH group, a SS bond, and a Cu-S bond. The film with good physical and chemical properties for the adhesion was obtained when blass plates are immersed in the polyethylene glycol solution of triazine trithiol (0.3%) at 130°C for 15min. In the vulcanizing adhesion of EPDM to the treated brass plates, the obtained adherends had a high peel strength. These functional groups in the film proved to react easily with EPDM because it wa s crosslinked with model compounds having these groups and bonds at 160°C. A heat treatment effect, which give very high adhesion force, was explained by the increase of chemical bond between EPDM and the film on the plates; the reaction are accelerated by oxygen in air. It is concluded from the above results that the surface treatment of brass plates with triazine thiols is essential to form chemical bond between EPDM and brass plates, giving the adherends with high peel strength.
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  • STUDY ON POLYFUNCTIONAL ADDITIVES II. VULCANIZATION OF NBR WITH 2-ANTIOXIDANT GROUPS-4, 6-BIS (4-MORPHOLINY POLYTHIO) 1, 3, 5-TRIAZINE
    Kunio Mori, Yoshiro Nakamura, Takashi Imai
    1984 Volume 57 Issue 6 Pages 385-395
    Published: 1984
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.57.385
    JOURNAL FREE ACCESS
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    In order to produce NBR vulcanizates which have high oil and thermal resistance at a complex aging, 2-antioxidant groups-4, 6-bis(4-morpholinyl polythio)1, 3, 5-triazine [R-nSM, antioxidant group(R): AD;-NHC6H4NHC6H5, A;-C6H2(C(CH3)3)2OH, 3C-N(CH(CH3)2-C6H4NHC6H5, P;-N(C6H5)C6H4NHC6 H5] was prepared. NBR proved to vulcanizate
    _??_ n: 1, 2, 3
    (R-nSN)
    with R-nSM at 155-170°C. Vulcanization rates increased in order of P-nSM<3C-nSM<A-nSM< AD-nSM for antioxidant groups, and in order of AD-1SM<AD-2SM<AD-3SM for the sulfur atom numbers. The combination of R-nSM and accelerators such as MBTS CZ, and TMTM gave practical vulcanization parameters at 155°C. Antioxidant bound to NBR increased in the similar order to that of the vulcanization rates. MBTS in some accelerators gave the highest antioxidant bound. NBR vulcanizates vulcanized with AD-3SM had a polysulfide crosslinkage. However, the combination of AD-3SM and TMTM gave about 88% of monosulfide crosslikage. From the results, it is confirmed that R-nSM has some functions such as antioxidant, vulcanization, and acceleration properties.
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  • [title in Japanese]
    1984 Volume 57 Issue 6 Pages 406-407
    Published: 1984
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.57.406
    JOURNAL RESTRICTED ACCESS
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