NIPPON GOMU KYOKAISHI
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Volume 35, Issue 8
Displaying 1-4 of 4 articles from this issue
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  • [title in Japanese]
    Robert W. Brown
    1962Volume 35Issue 8 Pages 577
    Published: 1962
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.35.577
    JOURNAL FREE ACCESS
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  • ADSORPTION OF IODINE BY CARBON BLACK (2)
    M. Mizutori, S. Hagiwara, Y. Fukuda, K. Kawazohe
    1962Volume 35Issue 8 Pages 578-582
    Published: 1962
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.35.578
    JOURNAL FREE ACCESS
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    After the investigation mentioned in Report No. 1, another investigation was conducted on the iodine adsorption of various carbon blacks. By comparing the amount of iodine required to form a monolayer with an electron microscope and nitrogen adsorption surface area, we found that the area covered by one iodine molecule is about 40 square A. Thus the surface area assumed from iodine adsorption is related only to the external surface and has nothing to do with the internal surface which was conjectured from micro pores on the surface of carbon black particles. By removing the tarry matter from carbon black by benzene extraction, the amount of iodine adsorbed and heat of adsorption changed. We found that such changes depend upon quality of raw materials from which carbon black is made.
    Further, we studied a simple method for process control. The most important factor in this method is the ratio of iodine to potassium iodide.
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  • ADSORPTION OF BROMINE BY CARBON BLACK
    M. Mizutori, S. Hagiwara, Y. Fukuda, K. Kawazohe
    1962Volume 35Issue 8 Pages 583-588
    Published: 1962
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.35.583
    JOURNAL FREE ACCESS
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    Following the investigations on iodine adsorption, we studied bromine adsorption using a bromine-potassium bromide aqueous solution. As bromine is much more volatile than iodine, it is difficult to determine bromine adsorption accurately. Because of high reactivity of bromine, however, we found a number of interresting phenomena, for example: (1) A great number of bromine molecules are reduced to bromine ions; (2) a considerable part of the bromine adsorbed can not be desorbed. Bromine adsorption, therefore, is not suitable for surface area determination, but for investigating the activity of the carbon black surface. Particularly, in the case of channel blacks containing high volatile matter, the behavior of bromine adsorption was quite different from that of iodine adsorption. From this experiment, we deduce that channel black is more active than furnace black.
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  • [title in Japanese]
    [in Japanese]
    1962Volume 35Issue 8 Pages 589-599
    Published: 1962
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.35.589
    JOURNAL FREE ACCESS
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