NIPPON GOMU KYOKAISHI
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Volume 52, Issue 11
Displaying 1-11 of 11 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1979 Volume 52 Issue 11 Pages 665-672
    Published: November 15, 1979
    Released on J-STAGE: March 05, 2013
    DOIhttps://doi.org/10.2324/gomu.52.11_665
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese], [in Japanese]
    1979 Volume 52 Issue 11 Pages 673-687
    Published: November 15, 1979
    Released on J-STAGE: March 05, 2013
    DOIhttps://doi.org/10.2324/gomu.52.11_673
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1979 Volume 52 Issue 11 Pages 688
    Published: November 15, 1979
    Released on J-STAGE: March 05, 2013
    DOIhttps://doi.org/10.2324/gomu.52.11_688
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1979 Volume 52 Issue 11 Pages 688a-692
    Published: November 15, 1979
    Released on J-STAGE: March 05, 2013
    DOIhttps://doi.org/10.2324/gomu.52.11_688a
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1979 Volume 52 Issue 11 Pages 693-702
    Published: November 15, 1979
    Released on J-STAGE: March 05, 2013
    DOIhttps://doi.org/10.2324/gomu.52.11_693
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1979 Volume 52 Issue 11 Pages 703-704
    Published: November 15, 1979
    Released on J-STAGE: March 05, 2013
    DOIhttps://doi.org/10.2324/gomu.52.11_703
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1979 Volume 52 Issue 11 Pages 705-706
    Published: November 15, 1979
    Released on J-STAGE: March 05, 2013
    DOIhttps://doi.org/10.2324/gomu.52.11_705
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1979 Volume 52 Issue 11 Pages 706
    Published: November 15, 1979
    Released on J-STAGE: March 05, 2013
    DOIhttps://doi.org/10.2324/gomu.52.11_706
    JOURNAL FREE ACCESS
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  • THE SYNTHESIS OF POLYACRYLAMIDE-CALCIUM CARBONATE COMPOSITE MATERIAL AND ITS MECHANICAL PROPERTIES
    Muneaki YAMAGUCHI, Isao SOUMA, Yuko TANAKA, Hiroshi TAKAHASHI
    1979 Volume 52 Issue 11 Pages 707-712
    Published: November 15, 1979
    Released on J-STAGE: March 05, 2013
    DOIhttps://doi.org/10.2324/gomu.52.11_707
    JOURNAL FREE ACCESS
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    A new composite material which contained inorganic plate crystals clathrated by polymer matrix and/or a chemical bond between them was prepared. For the preparation of the composite material, which was composed of polyacrylamide (PAAm) and calcite (CaCO3) mainly, some chemical procedures were used. Namely, when Ca (OH) 2obtained by hydration of CaO was mixed in an aqueous solution of PAAm, the viscosity of PAAm solution increased by progress of a crosslinking reaction and a growth of hexagonal plate crystals of Ca (OH) a was observed in the viscous solution of PAAm.When the weight ratio of PAAm/Ca (OH) 2 was about10%, the crystal growth was most effective. The PAAm-Ca (OH) 2mixture solution was dehydrated and moulded by filter press.After that, the moulding material (moisture content: about50%) was carbonated by CO2gas in an autoclave.Most of the plate crystals of Ca (OH) 2changed to plate crystals of calcite in the polymer matrix.
    The composite material obtained in this manner possessed appreciablly good mechanical properties. For example, the material with10weight% of PAAm/Ca (OH) 2ratio showed a bending strength of700kg/cm2and a compression strength of950kg/cm2.
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  • RECLAMATION OF VULCANIZED RUBBER BY CHEMICAL DEGRADATION (XI)
    SIMPLE RECLAMATION OF CARBON BLACK STOCK VULCANIZATES OF SYN THETIC RUBBERS BY THE COPPER (I) CHLORIDE-TRIBUTYLAMINE SYSTEM
    Nariyoshi KAWABATA, Kazunori UTANI, Shinzo YAMASHITA
    1979 Volume 52 Issue 11 Pages 713-723
    Published: November 15, 1979
    Released on J-STAGE: March 05, 2013
    DOIhttps://doi.org/10.2324/gomu.52.11_713
    JOURNAL FREE ACCESS
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    Carbon black stock vulcanizates of the following ten types of synthetic rubbers were reclaimed by the treatment with a softner and the copper (I) chloride-tributylamine system at room temperature for 50 h followed by mastication at room temperature for 5-15min.Sulfur vulcanizates of synthetic isoprene rubber, styrenebutadiene rubber, acrylonitrile-butadiene rubber, ethylene-propylene terpolymer, and butyl rubber; styrenebutadiene rubber vulcanized by tetramethylthiuram disulfide and zinc oxide; chloroprene rubber vulcanized by2-mercaptoimidazoline; and organic peroxide vulcanizates of styrene-butadiene rubber.chloroprene rubber, and ethylenepropylene terpolymer.Vulcanization of these reclaims with sulfur and vulcanization accelerator gave good elastomers.However, processability of the reclamation and tensile properties of the vulcanizates was much influenced by kinds of the softeners used for the reclamation.This seems to be due partly to a difference between polar nature of the softener and the rubber in original vulcanizate.
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  • [title in Japanese]
    1979 Volume 52 Issue 11 Pages 724-725
    Published: November 15, 1979
    Released on J-STAGE: March 05, 2013
    DOIhttps://doi.org/10.2324/gomu.52.11_724
    JOURNAL RESTRICTED ACCESS
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