NIPPON GOMU KYOKAISHI
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Volume 68, Issue 1
Displaying 1-15 of 15 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1995 Volume 68 Issue 1 Pages 1
    Published: 1995
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.68.1
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1995 Volume 68 Issue 1 Pages 2
    Published: 1995
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.68.2
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1995 Volume 68 Issue 1 Pages 3-5
    Published: 1995
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.68.3
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1995 Volume 68 Issue 1 Pages 6-7
    Published: 1995
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.68.6
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1995 Volume 68 Issue 1 Pages 8-10
    Published: 1995
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.68.8
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1995 Volume 68 Issue 1 Pages 11-24
    Published: 1995
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.68.11
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1995 Volume 68 Issue 1 Pages 25-29
    Published: 1995
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.68.25
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1995 Volume 68 Issue 1 Pages 30-31
    Published: 1995
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.68.30
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1995 Volume 68 Issue 1 Pages 32-33
    Published: 1995
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.68.32
    JOURNAL FREE ACCESS
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  • PREPARATION AND PROPERTIES OF STYRENE-BUTADIENE RUBBER/BROMINATED EPDM BLENDS
    Jae Ryong YOON, Akira TANAKA, Shinzo KOHJIYA
    1995 Volume 68 Issue 1 Pages 34-38
    Published: 1995
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.68.34
    JOURNAL FREE ACCESS
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    Brominated EPDM (2.4wt%) was investigated as a candidate to improve the properties of EPDM/diene rubber blends. Mechanical, adhesive, and fatigue properties of two series of blends with styrene-butadiene rubber (SBR) were studied. From the TG curves, SBR/BEPDM showed a shift to a higher temperature at the 5% weight loss, indicating improved heat resistance of the BEPDM. The tensile strength of SBR/BEPDM blends were significantly higher than those of SBR/EPDM blends. BEPDM blends exhibited significantly better fatigue property and adhesion force to natural rubber (NR) compared than the un-brominated one. These results indicated that the BEPDM was effective in improving tensile strength, adhesive force, and fatigue property of SBR/EPDM blends.
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  • STUDY ON THE WEAR OF TIRE TREAD RUBBER PART 1. WEAR UNDER CONDITION OF SMALL SLIP ANGLE
    Hideo SAKAI
    1995 Volume 68 Issue 1 Pages 39-46
    Published: 1995
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.68.39
    JOURNAL FREE ACCESS
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    Using flat-belt tire testbed this study investigated causal factors in the wear of tire tread. To ensure the success of the experiment the accuracy of the testing device was improved and the trial conditions were kept under close control. Measurement of the slip angles was refined to allow accuracy down to 1/100 degrees. Lateral movement of the belt, which causes variation in the slip angle, was reduced as much as possible. As a measure against sticky particles of worn rubber clinging to the surfaces of the safety walk ans tires a uniform amount of mica powder was electrostatically coated onto the tire tread surfaces. Surface whiteness was measured and controlled automatically to maintain a constant level. As the same time, tire tread surface temperatures were measured and automatically regulated by infra-red lamps, keeping temperatures constant. The amount of wear was calculated by weighing the tire, after drying them in a vacuum dryer, on a highly accurate six digit electrical balance sensitive down to 0.1g calibrations. Consequently, in a comparatively short time it was possible to ascertain measurable rates of wear as affected by a number of factors including: warm-up running, slip angle together with lateral forces, load, internal pressure, running speed and temperature. Utilizing the rates of wear measured for three types of tire, the lateral force frequency distribution when running on a certain road course was hypothesized, and the wear index calculated. It was found that the difference between tires varied according to the severity of the course (level of lateral force).
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  • ANTIOXIDATION ACTIVITIES OF AMINE ANTIOXIDANTS SUBSTITUTED WITH SULFONYLAMIDE GROUP FOR LOW DENSITY POLYETHYLENE
    Shigemitsu OTOMO, Yoshitomo YAMAMOTO
    1995 Volume 68 Issue 1 Pages 47-53
    Published: 1995
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.68.47
    JOURNAL FREE ACCESS
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    Arylsulfonamides (ASA), methanesulfonamide (SA-9) and arylamides (AAA) of p-aminodiphenylamine have been prepared as heat stabilizer, and their antioxidation activities for low density polyethylene (LDPE) have been evaluated by TG/DTA curve.
    Every ASA, in paticular hologen or methoxy substituted phenyl derivatives and naphthyl derivatives, have showed the high antioxidation activity for LDPE. On the other hand, antioxidation activities of SA-9 and AAA have proved to be poor, indicating that arylsulfonylamide group of ASA is essential for their high antioxidation activities.
    The brief mechanism including the formation of benzoquinone diimine has been put forward in favor of such superior performance of ASA in Fig. 6
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  • MODIFICATION OF THERMOPLASTIC POLYAMIDE-POLYETHER ELASTOMER BY REACTIVE EXTRUSION
    Tomohiro KURAMOCHI, Tomokazu INABA, Takayuki NATSUME, Yoshiyuki AOKI, ...
    1995 Volume 68 Issue 1 Pages 54-61
    Published: 1995
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.68.54
    JOURNAL FREE ACCESS
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    Thermoplastic elastomer (TPE) is an elastomer at room temperature, and can be molded at high temperature as well as thermoplastics. But the compression set of TPE is higher than that of crosslinked rubber.
    In this study, we tried crosslinking of thermoplastic polyamide-polyether elastomer (TPAE) with diglycidyl or triglycidyl compounds during its extrusion to improve its high compression set. Crosslinked TPAE could be molded easily in single screw extruder. The tensile strength, tensile impact strength, heat resistance and chemical resistance of the molded TRAE were found to be higher than those of the original TPAE respectively. It was confirmed that ruptured cross section view of crosslinked TPAE by scanning electron microscope was smoother than that of the original TPAE. The compression set of TPAE was improved by 1/3 compared to the original TPAE.
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  • STUDIES ON RUBBER MIXING PART 1
    ACTIN OF ZINC OXIDE
    Nobuaki URABE, Hiroshi TAKATSUGI, Michio ITO, Hideo TOKO, Masahiko FUK ...
    1995 Volume 68 Issue 1 Pages 62-68
    Published: 1995
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.68.62
    JOURNAL FREE ACCESS
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    It has revealed that the coexisting zinc oxide much influenced to the mixing mechanisms of the carbon black in the internal mixer. In the case of the negative charged rubber sample, it was found that the change of the electricity caused by mixing of negative charged carbon black and positive charged zinc oxide much reduced BIT depending on the water supply temperature to mixer. Using these informations, it has become feasible to predict the behavior of rubber and carbon black in the mixing by connecting the stress relaxation time and electricity of the carbon.
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  • [title in Japanese]
    [in Japanese]
    1995 Volume 68 Issue 1 Pages 69-70
    Published: 1995
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.68.69
    JOURNAL RESTRICTED ACCESS
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