NIPPON GOMU KYOKAISHI
Print ISSN : 0029-022X
Search
Advanced search
OR
Browse
Search
Volume 67, Issue 4
Displaying 1-11 of 11 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • [title in Japanese]
    [in Japanese]
    1994 Volume 67 Issue 4 Pages 237-250
    Published: 1994
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.67.237
    JOURNAL FREE ACCESS
    Download PDF (2662K)
  • CHARACTERIZATION OF REINFORCING IN RUBBER
    SOOS István
    1994 Volume 67 Issue 4 Pages 251-262
    Published: 1994
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.67.251
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The author tries to apply a new method to characterize the reinforcing effect of fillers on basis of the Mullins softening and recovery, followed by the evaluation of the stress-elongation curves obtained after repeated deformation cycles and heat treatments of various duration. The apparent activation energy of the recovery process, i.e., the reformation of physical bonds after Mullins softening, was between 30-60kJ/mol. It is predominantly a physical process. By the evaluation of the stress-strain curves according to the Mooney-Rivlin equation, it is established that the constant C1 of the equation depends primarily on the number of the active network chain segments of the stable chemical network formed during vulcanization, which is also the case in filled vulcanizates. On the other hand, constant C2 of the equation depends on the rubber-filler physical interaction, and on the number of effective network chain segments determined by chain entanglements. As these physical network point undergo changes during the deformation, the value of C2 also changes. The constant C2 can be used as a general parameter for the characterization of the activity, the reinforcing effect of fillers.
    View full abstract
    Download PDF (1113K)
  • [title in Japanese]
    [in Japanese]
    1994 Volume 67 Issue 4 Pages 263-268
    Published: 1994
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.67.263
    JOURNAL FREE ACCESS
    Download PDF (846K)
  • [title in Japanese]
    [in Japanese]
    1994 Volume 67 Issue 4 Pages 269-274
    Published: 1994
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.67.269
    JOURNAL FREE ACCESS
    Download PDF (689K)
  • [title in Japanese]
    1994 Volume 67 Issue 4 Pages 275-276
    Published: 1994
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.67.275
    JOURNAL FREE ACCESS
    Download PDF (276K)
  • ADHESION OF ABS RESIN TO STEEL AND COPPER PLATES TREATED IN TRIAZINE-NONAQUEOUS SOLUTION BY INSERT-MOLDING
    Takatoshi KONO, Hideyuki SASAKI, Takasi KOMUKAI, Koji SEGAWA, Ichiro K ...
    1994 Volume 67 Issue 4 Pages 277-282
    Published: 1994
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.67.277
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Adhesion of ABS resin to steel and copper plates treated in triazine-nonaquious solution was investigated. As a triazine compound, 1, 3, 5-triazine-2, 4, 6-trithiol(RTD) was used. And decalin and triethyleneglycol were used as nonaquious solutions. Each test plates were immered in 0.4% RTD-nonaqueous solutions at 160_??_190°C for 10_??_15min.. By immersing, the thin RTD films of about 50_??_350Å were formed on the test plates. And then, the plates treated in RTD-solution were inserted in mold and ABS resin was injected.
    As the results, the adhesive strength showed about 6700N/24cm2 with breaking ABS resin on the steel and copper plates treated in RTD-solution for 10_??_15 min..
    On the other hand, it was supposed that this adhesive strength was due to formation of the chemical bonding between butadiene in ABS resin and carbon of s-teiazine ring in RTD films on steel and copper plates.
    View full abstract
    Download PDF (667K)
  • THE PERFORMANCE OF THIOXANTHOGEN DISULFIDE DE RIVATIVES AS ORGANIC RUBBER CHEMICALS
    Takashi WATANABE
    1994 Volume 67 Issue 4 Pages 283-287
    Published: 1994
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.67.283
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Thioxanthogen disulfide derivatives (TXDS) were synthesized from mercaptanes, and their performance as a non-nitrosoamine type chemical for rubber was inverstigated. TXDS did not act as vulcanization accelerator, but the scorch time was improved remarkably when TXDS and the vulcanization accelerator such as MBT were uesd together. The TLC analysis of the products formed by the reaction of TXDS with CBS or OBS suggests that TXDS reacted with the vulcanization accelerator to afford reaction intermediates, which resulted in the delayed scorch time.
    View full abstract
    Download PDF (452K)
  • THE ABILITY OF POLYTHIO CARBONATES AS VULCANIZATION ACCELERATORS FOR NR LATEX
    Takashi WATANABE, Motoji OKIKURA, Kunio NIIJIMA
    1994 Volume 67 Issue 4 Pages 288-292
    Published: 1994
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.67.288
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Three polythiocarbonates were synthesized from sodium sulfide and carbon disulfide, and their performance as NR latex vulcanization accelerator was studied. Such ability of polythiocarbonates decreased in the order a2CS3>Na2CS4_??_Na2CS5. Tri- or tetra substituted thiocarbonates had high ability of cure acceleration, but pentasubstituted one had no ability. In the case of Na2CS3, monosodium salt with one CH3 group had no accelerating ability, which suggests that disodium salt structure is necessary for the acceleration. The increase of Na2CS3, the increase of cure temperature, and the increase of cure time, all resulted in higher acceleration of the vulcanization. These results indicate that Na2 CS3 may be of use as a practical non-nitrosoamine type vulcanization accelerator, although the accelerating effect of Na2CS3 is a little lower than that of sodium dibutyl dithiocarbamate (NaBDC).
    View full abstract
    Download PDF (457K)
  • AGING OF NR-BRASS CORD ADHERENDS IN MOISTURE ENVIRONMENTS
    Kunio MORI, Saiso KIMU, Takaomi YASUKAWA, Hidetoshi HIRAHARA, Yoshiyuk ...
    1994 Volume 67 Issue 4 Pages 293-305
    Published: 1994
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.67.293
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Effects of sulfur content, accelerators, and formulation on the adhesion loss of NR-brass cord adherends in water aging have been investigated for peel strength and rubber coverages. The adherends prepared by base formulation with a low sulfur curing system gave low aging rate in water for an initial aging period at 95°C, but increased aging rate for a latter period. In the case of high sulfur content, aging rate was large for an initial aging period but decreased for a latter aging period. To the adherends prepared by high sulfur curing system, Co formulation gave lower aging rate in water than base formulation. In the case of Co formulation, steam aging gave higher aging rate than water aging. Sulfenamides such as DCBS, CBS, OBS and BBS decreased markedly the peel strength of the adherends and the rubber coverages during water aging even for a short time but thiazoles such as MBTS and MBT kept the high peel strength and coverages for a long time. The SEM observation and EPMA analysis for the peeling surfaces of adherends after water aging showed that the fraction of adherends was generated at brass layer at an initial aging stage and that the adhesion loss of adherends in water began from the stress corrosion crack of brass layer.
    View full abstract
    Download PDF (1762K)
  • ESTIMATION OF ANTIOXIDATION ACTIVITY OF ANTIOXIDANT FOR LOW DENSITY POLYETHYLENE BY TG-DTA
    Shigemitsu OTOMO, Hidenao SHIMIZU, Yoshitomo YAMAMOTO
    1994 Volume 67 Issue 4 Pages 306-313
    Published: 1994
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.67.306
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Antioxidation activities of various types antioxidants have been evaluated by TG-DTA curves. The results of TG-DTA have showed that the heat stability of the low density polyethylene at high temperature has been very improved by means of adding either N, N′-di-β-naphthyl-p-phenylenediamine or 4-anilino-p-toluene-sulfonailide. It has been also concluded that antioxidation activity of antioxidant at high temperature depends on the stability of radical derived from antioxidant.
    View full abstract
    Download PDF (691K)
  • [title in Japanese]
    [in Japanese]
    1994 Volume 67 Issue 4 Pages 314-315
    Published: 1994
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.67.314
    JOURNAL RESTRICTED ACCESS
    Download PDF (288K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top