All issues
Predecessor
Volume 69, Issue 6
Displaying 1-11 of 11 articles from this issue
- |<
- <
- 1
- >
- >|
-
[in Japanese]1996 Volume 69 Issue 6 Pages 387-394
Published: 1996
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSDownload PDF (1020K) -
[in Japanese]1996 Volume 69 Issue 6 Pages 395-406
Published: 1996
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSDownload PDF (1418K) -
[in Japanese], [in Japanese]1996 Volume 69 Issue 6 Pages 407-413
Published: 1996
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSDownload PDF (869K) -
[in Japanese]1996 Volume 69 Issue 6 Pages 414-415
Published: 1996
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSDownload PDF (245K) -
[in Japanese]1996 Volume 69 Issue 6 Pages 416-419
Published: 1996
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSDownload PDF (1169K) -
Toshiki SHIMIZU, Satoru KOSHIRO, Yoshio YAMADA1996 Volume 69 Issue 6 Pages 420-422
Published: 1996
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSThis paper reports the effect of cell structure and air flow on oil absorption of highly oil absorptive polyurethane foam (ON-PUR) which is suitable for on-site foaming. We have developed ON-PUR for highly oil absorbing polyurethane foam with very reactive recipe. ON-PUR was synthesized with mixing polyol, water, additives and polymeric diphenylmethane diisocyanate (P-MDI) by a high pressure foaming machine. Density, air flow, oil absorption of the foam, and cell structure by microscope were measured. From the results it was found that the air flow of the foam increased by crushing, and the oil absorption of the foam sharply increased in a narrow range (from 0.1 to 0.8 ft3/min: SCFM). The increase is supposed to be due to the decrease of closed cell structure by crushing treatment.View full abstractDownload PDF (592K) -
Takaharu IKEDA, Shinya SAKURAI, Kenji NAKANO, Bunichiro YAMADA, Tadash ...1996 Volume 69 Issue 6 Pages 423-429
Published: 1996
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESS“in situ” polymerizations in a ternary system consiting of hydrogenated nitrile rubber (HNBR)/zinc methacrylate (ZMA)/perfluoroalkyl acrylate (RFA) were carried out. ZMA and RFA were assumed to polymerize in HNBR matrix during the peroxide vulcanizing process.
In this report, a method to evaluate the conversion of those monomers (ZMA and RFA) in the vulcanizing process was shown. It was found that the conversion of those monomers in both systems was affected by the concentration of peroxide, and vulcanization curves suggested short vulcanizing times for the present systems. Tensile properties, surface friction and dynamic viscoelasticity measurements were also made for the composite vulcanizates obtained from the system of HNBR/ZMA/RFA. The results indicated that the composite vulcanizates had such excellent properties as (1) high tensile strength and (2) low surface friction.View full abstractDownload PDF (784K) -
(1) INVESTIGATION ON THE FRICTION BEHAVIORS OF SPECIAL PURPOSE RUBBERS USING VARIOUS TRIBOMETERSNoriaki WADA, Akiyoshi INOUE, Yasushi KURITA, Masayoshi NAKAJIMA, Yosh ...1996 Volume 69 Issue 6 Pages 430-441
Published: 1996
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSThe friction properties of Rubbers (CR, NBR, H-NBR, EPDM, CSM), that has a hardness of approximately 70 degrees, were examined. The experiments were conducted under various loads, sliding speeds, temperatures and surface roughness. The coefficient of friction decreased as surface roughness of the rubber and mating materials increased. However, friction coefficients remained almost unchanged when the surface roughness of the rubber specimens was larger than 1μm (Ra). With an increased load or contact pressure, the static friction coefficients markedly decreased. The variations of dynamic friction coefficients were small. With increasing ambient temperature, the curve of friction coefficients with sliding speeds shifted to higher speeds. In the specimens examined, the minimum friction coefficient was obtained in the NBR specimen. For the CR and the EPDM specimens, the friction coefficients gradually fell to their constant value by repeated sliding. Stick-slip motions for the CR and the CSM specimens were observed more often than in other specimens.View full abstractDownload PDF (1299K) -
Shinzo KOHJIYA, Akira TANAKA, Yoshihiko WADA, Yuko IKEDA1996 Volume 69 Issue 6 Pages 442-446
Published: 1996
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSIn situ silica reinforcement of butadiene rubber (BR) was carried out by the sol-gel process using tetraethoxysilane (TEOS). BR was sulfur-cured, and the BR vulcanizates were subjected to soaking in TEOS at 30°C for 48 hours. The swollen samples were soaked in an aq. solution of catalyst under various conditions to conduct the sol-gel reaction of TEOS in the rubber matrix. Further, the vulcanizates were kept at 50°C for 72 hours. The catalyst used in this study was n-butylamine. The resulting vulcanizates were silica stocks by in situ filling technique, and were subjected to tensile tests. The effects of concentration of the catalyst (2, 10, 20wt%) and soaking temperature, i.e., the reaction temperature in the aq. catalyst solution (30, 40, 50°C) on in situ silica filling for reinforcement were discussed in term of tensile properties of the BR vulcanizates. The effect of soaking time (2, 5, 12, 30h) in the catalyst solution was also evaluated for the reinforcement. When the BR vulcanizate was soaked in 2wt% n-butylamine aq. solution at 50°C for 24 hours, the silica content became largest and homogeneous filling was found. Hence, the modulus of the vulcanizates became highest among the samples. The diameter of the in situ filled silica was ca. 30nm. The soaking time did not much influence on the in situ silica reinforcement of the vulcanizates.View full abstractDownload PDF (885K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...1996 Volume 69 Issue 6 Pages 447-451
Published: 1996
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSDownload PDF (692K) -
[in Japanese]1996 Volume 69 Issue 6 Pages 452-453
Published: 1996
Released on J-STAGE: July 09, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (230K)
- |<
- <
- 1
- >
- >|