NIPPON GOMU KYOKAISHI

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Volume 72, Issue 7

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[title in Japanese]

[in Japanese]

1999 Volume 72 Issue 7 Pages 367
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.367

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[title in Japanese]

[in Japanese]

1999 Volume 72 Issue 7 Pages 368
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.368

JOURNAL FREE ACCESS

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[title in Japanese]

[in Japanese]

1999 Volume 72 Issue 7 Pages 369
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.369

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[title in Japanese]

[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...

1999 Volume 72 Issue 7 Pages 370
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.370

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[title in Japanese]

[in Japanese]

1999 Volume 72 Issue 7 Pages 371
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.371

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[title in Japanese]

[in Japanese]

1999 Volume 72 Issue 7 Pages 372
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.372

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[title in Japanese]

[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...

1999 Volume 72 Issue 7 Pages 373
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.373

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[title in Japanese]

[in Japanese], [in Japanese]

1999 Volume 72 Issue 7 Pages 374
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.374

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[title in Japanese]

[in Japanese]

1999 Volume 72 Issue 7 Pages 375
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.375

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[title in Japanese]

[in Japanese]

1999 Volume 72 Issue 7 Pages 376
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.376

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[title in Japanese]

[in Japanese]

1999 Volume 72 Issue 7 Pages 377
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.377

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[title in Japanese]

[in Japanese]

1999 Volume 72 Issue 7 Pages 378-386
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.378

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[title in Japanese]

[in Japanese]

1999 Volume 72 Issue 7 Pages 387-394
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.387

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[title in Japanese]

[in Japanese], [in Japanese]

1999 Volume 72 Issue 7 Pages 395-403
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.395

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[title in Japanese]

[in Japanese]

1999 Volume 72 Issue 7 Pages 404-412
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.404

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CRYSTALLIZATION BEHAVIOR OF NATURAL RUBBER, PART3 EFFECT OF SATURATED FATTY ACID ON CRYSTALLIZATION OF CIS-1, 4-POLYISOPRENE

Seiichi KAWAHARA, Ai MATSUURA, Takashi KAKUBO, Naoyuki NISHIYAMA, Yasu ...

1999 Volume 72 Issue 7 Pages 413-417
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.413

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Crystallization behavior of synthetic cis-1, 4 polyisoprene (IR), mixed with 0.4×10^-2mol/kg_??_4.8×10^-2mol/kg saturated fatty acid, was investigated by dilatometry at -25 and -15°C. The crystallization of IR was abruptly promoted by the addition of saturated fatty acids higher than 1.0×10^-2mol/kg, such as stearic acid, palmitic acid and myristic acid, respectively, because of the formation of crystalline domain of the fatty acids. But, capric acid did not stimulate the crystallization of IR due to melting at above -25°C and soluble into IR. These demonstarate that the lowest concentration of fatty acids necessary for the acceleration of the crystallization rate of IR was 1.0×10^-2mol/kg, when fatty acid formed crystalline domain dispersed in IR matrix. The crystallization of IR was influenced by not only equilibrium crystal structure, but also dynamic deposition of stearic acid from melt, which was confirmed by precooling of the rubber at 0, 10 and 30°C before crystallization at -25°C.

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REACTIVE PROCESSING OF THE MIXTURES OF AMORPHOUS POLYESTER WITH POLYAMIDE ELASTOMER IN THE PRESENCE OF MULTIGLYCIDYL COMPOUNDS

Tomohiro KURAMOCHI, Hiromi IWASE, Kazuhiko HASHIMOTO

1999 Volume 72 Issue 7 Pages 418-424
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.418

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STUDY ON ORGANIC RUBBER CHEMICALS, PART 5. THE PERFORMANCE OF 4, 4′-BIS(ALKYLAMINO)DIPHENY-LAMINE DERIVATIVES AS RUBBER ANTIDEGRADATION

Takashi WATANABE

1999 Volume 72 Issue 7 Pages 425-428
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.425

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The new antidegradant, 4, 4′-bis (alkylamino) diphenylamine (BAADA) was synthesized by reductive alkylation of 4, 4′-diaminodiphenylamine. The values of tensile strength (T_B) retained rate after aging of the cured rubber compounds including BAADA were found to be equal to or alightly larger than those including 2/3 molar amount of the reference substance, N-1, 3-dimethylbutyl-N′-phenyl-p-phenylenediamine. The variation of the alkyl chain length of BAADA from C₃ to C₈ showed almost no change in T_B retained rate under the condition of equal molar weight ratio.

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CONTINUOUS DEVULCANIZATION BY SHEAR FLOW STAGE REACTION CONTROL TECHNOLOGY FOR RUBBER RECYCLING, PART 5. DEVULCANIZATION CONDITION AND MECHANICAL PROPERTIES OF REVULCANIZED RUBBER FOR USED TIRE WASTE

Makoto MOURI, Norio SATO, Hirotaka OKAMOTO, Mitsumasa MATSUSHITA, Hide ...

1999 Volume 72 Issue 7 Pages 429-433
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.429

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Continuous devulcanization by shear flow stage reaction control technology for sulfur vulcanized EPDM rubber has been developed. In this study, this technology has been applied for the devulcanization of rubber tire consisting of NR/SBR which has been used in practice. By optimizing devulcanization conditions such as reaction temperature, screw rotation and addition of process oil, devulcanized rubber can be extruded continuously. The devulcanized rubber can be revulcanized by conventional curing process with sulfur-accelerator vulcanizing system. The revulcanized rubber shows good mechanical properties which meet JIS K6313 standard.

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CONTINUOUS DEVULCANIZATION BY SHEAR FLOW STAGE REACTION CONTROL TECHNOLOGY FOR RUBBER RECYCLING, PART6. DEVULCANIZATION CONDITION AND MECHANICAL PROPERTIES OF REVULCANIZED RUBBER FOR BUTYL TUBE WASTE

Makoto MOURI, Norio SATO, Hirotaka OKAMOTO, Mitsumasa MATSUSHITA, Hide ...

1999 Volume 72 Issue 7 Pages 434-438
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.434

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Continuous devulcanization by shear flow stage control technology for vulcanized rubber has been developed. This technology has been applied to sulfur vulcanized EPDM rubber and used tire waste (NR/SBR). In this study, this technology has also been applied to butyl rubber as used for tube. By optimizing devulcanization conditions such as reaction temperature and screw rotation, devulcanized rubber can be extruded continuously. The devulcanized rubber can be revulcanized by conventional curing process with sulfur-accelerator vulcanizing system. The revulcanized rubber shows good mechanical properties which meet JIS K6313 standard.

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[title in Japanese]

[in Japanese]

1999 Volume 72 Issue 7 Pages 440-441
Published: 1999
Released on J-STAGE: July 09, 2007

DOIhttps://doi.org/10.2324/gomu.72.440

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