NIPPON GOMU KYOKAISHI
Print ISSN : 0029-022X
Search
Advanced search
OR
Browse
Search
Volume 35, Issue 12
Displaying 1-11 of 11 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • [title in Japanese]
    [in Japanese]
    1962 Volume 35 Issue 12 Pages 897
    Published: 1962
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.35.897
    JOURNAL FREE ACCESS
    Download PDF (109K)
  • STUDIES ON ACTIVATION ENERGY AND VULCANIZATION TEMPERATURE COEFFICIENT I.
    ACTIVATION ENERGY AND TEMPERATURE COEFFICIENT IN THE INDIRECT VULCANIZATIONg
    K. Ikkaku, K. Ko
    1962 Volume 35 Issue 12 Pages 898-913
    Published: 1962
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.35.898
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In order to examine the activation energy and the temperature coefficient in the indirect vulcanization process in comparison with those in the press vulcanization, measurements were made by means of modulus method on three kinds of mixtures of natural rubbers of which mixing ratio near those in practice. It was known that induction time showed by far larger values in the indirect vulcanization and it was also observed in the press vulcanization under some condition, which indicated that, in modulus method, true equivalent vulcanization time was obtained by subtracting induction time from apparent equivalent vulcanization time. Activation energy and temperature coefficient in the indirect vulcanization were estimated to have almost the same vulues as those in the press vulcanization, though the comparison could not be exactly done because of the essential difference of accuracy which existed between the former and the latter.
    View full abstract
    Download PDF (767K)
  • STUDIES ON ACTIVATION ENERGY AND VULCANIZATION TEMPERATURE COEFFICIENT II.
    ACTIVATION ENERGY AND VULCANIZATION TEMPERATURE COEFFICIENT CALCULATED FROM MOONEY SCORCH TIME
    K. Ikkaku
    1962 Volume 35 Issue 12 Pages 913-918
    Published: 1962
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.35.913
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Activation energy and temperature coefficient in the press vulcanization were obtained from measurements of Mooney Scorch time on three kinds of mixtures of natural rubbers. By assuming time lag to be 2 minutes both in the case of 5 point up and of 10 point up, logarithm of Scorch time was found to be in the linear relation with reciprocal of absolute temperature and theoretical formula of vulcanization slide rule could be applied. Consequently, it was known that measurements of Mooney Scorch time give activation energy much more efficiently than modulus method and vulcanization temperature coefficient calculated from activation energy resulted in smaller error in this case.
    View full abstract
    Download PDF (351K)
  • BLENDING OF NATURAL RUBBER AND SBR
    PART 6. EFFECTS OF CLAY AND CALCIUM CARBONATE ON THE PROPERTIES OF NR-SBR BLENDS
    M. Imoto, Y. Minoura, T. Ishihara, A. Kawamata, T. Goto, R. Konno, S. ...
    1962 Volume 35 Issue 12 Pages 918-924
    Published: 1962
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.35.918
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The behaviors of fillers such as clay and calcium carbonate to NR-SBR blend in the various ratio were studied for the physical properties of uncured stocks and vulcanizates. As the results, it was found that the remarkable increase of Mooney value was caused by the increasing of the amount of fillers more than 100 PHR. And the tensile strength showed a maximum point at a certain amount of fillers. These maximum points were found to shift to the position corresponding to the higher amount of fillers as the proportion of SBR in NR-SBR blends increased.
    View full abstract
    Download PDF (449K)
  • BLENDING OF NATURAL RUBBER AND SBR
    PART 7. EFFECTS OF WHITE CARBON ON THE PROPERTIES OF NR-SBR BLENDS
    M. Imoto, Y. Minoura, T. Ishihara, A. Kawamata, T. Goto, R. Konno, S. ...
    1962 Volume 35 Issue 12 Pages 924-928
    Published: 1962
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.35.924
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The effects of white carbon on the NR-SBR blends were studied. Mooney value increased with the amount of white carbon. When SBR ratio to NR in NR-SBR blends got above 50/50, it became very difficult to compound the larger amount of white carbon. The tensile strength showed a maximum point at a certain amount of white carbon, similar to the case of clay and the other fillers. However, modulus and hardness etc. showed approximately linear relationships with the amount of filler in all blend ratio of NR-SBR blends.
    View full abstract
    Download PDF (314K)
  • BLENDING OF NATURAL RUBBER AND SBR
    PART 8. EFFECTS OF CARBON BLACKS ON THE PROPERTIES OF NR-SBR BLENDS
    M. Imoto, Y. Minoura, T. Ishihara, A. Kawamata, T. Goto, R. Konno, S. ...
    1962 Volume 35 Issue 12 Pages 929-939
    Published: 1962
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.35.929
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The effects of carbon blacks on NR-SBR blends were studied. Furnace- and channel carbon blacks were conpounded to rubber by the laboratory mill, the factory mill and Banbury mixer. As the results, it was found that carbon blacks showed the similar tendency to various fillers such as clay and calcium carbonate. No effects of oleic acid and naphthenic oil as modifier on carbon black compounds were found.
    View full abstract
    Download PDF (577K)
  • Erratum
    1962 Volume 35 Issue 12 Pages 939
    Published: 1962
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.35.12_939
    JOURNAL FREE ACCESS
    Download PDF (51K)
  • [title in Japanese]
    [in Japanese]
    1962 Volume 35 Issue 12 Pages 940-942
    Published: 1962
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.35.940
    JOURNAL FREE ACCESS
    Download PDF (257K)
  • [title in Japanese]
    [in Japanese]
    1962 Volume 35 Issue 12 Pages 943-957
    Published: 1962
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.35.943
    JOURNAL FREE ACCESS
    Download PDF (1533K)
  • [title in Japanese]
    [in Japanese]
    1962 Volume 35 Issue 12 Pages 958-962
    Published: 1962
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.35.958
    JOURNAL FREE ACCESS
    Download PDF (457K)
  • [title in Japanese]
    [in Japanese]
    1962 Volume 35 Issue 12 Pages 963-964
    Published: 1962
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.35.963
    JOURNAL RESTRICTED ACCESS
    Download PDF (202K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top