NIPPON GOMU KYOKAISHI
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Volume 69, Issue 8
Displaying 1-10 of 10 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1996Volume 69Issue 8 Pages 521-532
    Published: 1996
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.69.521
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1996Volume 69Issue 8 Pages 533-538
    Published: 1996
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.69.533
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1996Volume 69Issue 8 Pages 539-541
    Published: 1996
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.69.539
    JOURNAL FREE ACCESS
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  • STUDY OF PERMEATION MODEL (PART 2) MODIFIED MAXWELL′S EQUATION
    Akitaka SENUMA, Yasuharu MORITANI
    1996Volume 69Issue 8 Pages 542-547
    Published: 1996
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.69.542
    JOURNAL FREE ACCESS
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    By comparison with a double column model, a double layer model was concluded not to be suitable as a permeation model in principle. Maxwell′s equation which has been used to study the permeability of two components membrane with phase separation structures, was found to be introduced from the basis of the double layer model. Then Maxwell′s equation was considered not to be used for the analyses of the permeabilities.
    The following modified Maxwell′s equation was introduced on the basis of the double column model.
    P=Pa{(Pa+2Pb)-(Pa-Pb)Vb}/{(Pa+2Pb)+2(Pa-Pb)Vb}
    where P, Pa and Pb are the permeability coefficiects of the membrane, component A and B, respectively, and Va and Vb are the volume fractions of A and B, respectively.
    The validities of these equations were investigated by the data of the oxygen and nitrogen permeability coefficient of EVA modified PDMS membranes by authors and also of the water permeability coefficient of PES-phenoxy polymer blends by Swinyard et al..
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  • STUDY OF PERMEATION MODEL (PART 3) EQUATIONS CONCERNING PERMEABILITY AND CONTENT OF COMPONENT FROM A DOUBLE COLUMN MODEL
    Akitaka SENUMA, Yasuharu MORITANI
    1996Volume 69Issue 8 Pages 548-552
    Published: 1996
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.69.548
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • HIGHLY PURIFIED NATURAL RUBBER
    I. PREPARATION OF ANIONIC LATEX AND ITS PHYSICAL PROPERTIES
    Toshiaki SAKAKI, Yuichi HIOKI, Makoto KOJIMA, Akihito KUGA, Yasuyuki T ...
    1996Volume 69Issue 8 Pages 553-556
    Published: 1996
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.69.553
    JOURNAL FREE ACCESS
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    Highly deproteinized natural rubber (HDPNR) latex was prepared by incubation of natural rubber latex with proteolytic enzyme and anionic surfactant (s). The nitrogen content of HDPNR was less than 0.02%. Green strength of HDPNR from high-ammonia latex (HA-latex) was the same as that of HA-latex. HDPNR had a good processability for a coagulant dipping process. The sulfur cured film from HDPNR showed a similar tensile strength, lower modulus, lower permanent set and lower water absorption, compared with that from HA-latex.
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  • HIGHLY PURIFIED NATURAL RUBBER
    II. EFFECT OF SMALL RUBBER PARTICLES
    Yasuyuki TANAKA, Atsuko KAWASAKI, Yuichi HIOKI, Eiji KANAMARU, Kazuhik ...
    1996Volume 69Issue 8 Pages 557-561
    Published: 1996
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.69.557
    JOURNAL FREE ACCESS
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    Highly Deproteinized natural rubber (HDPNR) latex was obtained by incubation with proteolytic enzyme in the presence of surfactant (s) followed by washing using a rotary disk membrane module. HDPNR latex showed the same particle-size distribution as the untreated latex and got rise to mechanical stability and processability better than that obtained by conventional centrifugation. The effect of small rubber particles in HDPNR latex was discussed.
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  • HIGHLY PURIFIED NATURAL RUBBER
    III. BIOLOGICAL PROPERTIES
    Masaharu HAYASHI, Shinichi NAKADE, Makoto SUNAGAWA, Teturo KANO, Kumik ...
    1996Volume 69Issue 8 Pages 562-565
    Published: 1996
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.69.562
    JOURNAL FREE ACCESS
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    Highly deproteinized natural rubber (HDPNR) latex was prepared by incubation of high-ammonia latex (HA-latex) with proteolytic enzyme in the presence of surfactant (s) followed by concentration with centrifuge. The nitrogen content of HDPNR was less than 0.02%. The potential of Type I allergy was evaluated by passive cutaneous anaphylaxis reaction test (PCA tests) and Enzyme-linked immunosorbent assay (ELISA). Antibody was not detected in the serum of animals sensitized with HDPNR latex by these two test.
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  • DILATOMETRIC MEASUREMENT OF POLYISOPRENES ON STRETCHING
    Kazuo NAITO, Kinji MASUDA, Takaaki IMAMURA
    1996Volume 69Issue 8 Pages 566-572
    Published: 1996
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.69.566
    JOURNAL FREE ACCESS
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    The crystallinity of polyisoprene elastomers including natural rubber on stretching was measured using a diratometer designed for streched samples. It was found that a polyisoprene of 90% cis 1, 4 content showed much less crystallization on stretchig than did natural rubber or higher cis 1, 4 content polyisoprene at 5 to 15°C. The onset of the steep increase in stress was found to start at a higher strain as the cis 1, 4 content decreased. The repulsion property of stretched rubbers was improved, especially at low temperatures for low cis 1, 4 content rubber. This result implies increased flight distance of golf balls made of lower cis 1, 4 polyisoprene. Generally, the crystallinity of an elastomer on stretching is measured using an X-ray diffractometer. The diratometric method used in this work offers (1) simple, low cost apparatus (2) easy temperature variation (3) information on the interaction between a filler and an elastomer.
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  • [title in Japanese]
    [in Japanese]
    1996Volume 69Issue 8 Pages 574-575
    Published: 1996
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.69.574
    JOURNAL RESTRICTED ACCESS
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