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Predecessor
Volume 73, Issue 5
Displaying 1-10 of 10 articles from this issue
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]2000 Volume 73 Issue 5 Pages 225-232
Published: 2000
Released on J-STAGE: July 09, 2007
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[in Japanese]2000 Volume 73 Issue 5 Pages 233-239
Published: 2000
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSDownload PDF (1036K) -
[in Japanese]2000 Volume 73 Issue 5 Pages 240-246
Published: 2000
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSDownload PDF (1176K) -
Shin-ichiro Goto, Tohei Yamamoto, Shinzo Yamashita2000 Volume 73 Issue 5 Pages 247-253
Published: 2000
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSWe tried to make blends of amorphous polyamide and various rubbers such as acrylonitrile-butadiene copolymer (NBR), isobutylene-isoprene copolymer (IIR), natural rubber (NR) and ethylene-propylene-diene terpolymer (EPDM). In order to improve the compatibility of polyamide (PA) with rubber (Rub), we used alkylphenolformaldehyde-resin (PR), which is reactive to both PA and Rub, as a compatibilizer. We first synthesized a copolymer of amorphous polyamide (AmPA) and PR, and by mixing PR- AmPA copolymer and respective Rub, various blends were obtained. By the measurement of mechanical properties of the Blends, the order of compatibility of Rub to AmPA was found to be NBR>EPDM>NR>IIR. In case of NBR, it was found that the matrix and the dispersed phase were NBR and AmPA, respectively, and PR played as a good compatibilizer to afford good dispersion of AmPA phase in Rub matrix.View full abstractDownload PDF (1140K) -
Material Recycling of Waste Agricultural PVC FilmTomoaki TAGAMI, Satoshi ISHIMARU, Takeshi KONDOU, Shuuji IMAI, Hiroshi ...2000 Volume 73 Issue 5 Pages 254-258
Published: 2000
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSBlending waste agricultural poly(vinyl chloride) (PVC) films with the rubbers, such as natural rubber(NR), ethylene-propylene-diene rubber(EPDM), acrylonitrile-butadiene rubber(NBR), styrenebutadiene rubber(SBR), butadiene rubber (BR) and chloroprene rubber (CR) was investigated for material recycling. The blening of waste agricultural PVC film with NR, which was different from PVC in polarity, was found to be possible with high temperature mixing at 130°C in an internal mixer. Waste agricultural PVC films was able to be blended over 50phr of NBR, and up to 10phr of NR, EPDM, SBR, BR and CR respectively. Epoxidized natural rubber(ENR) worked effectively as a compatibilizer between waste agrricultural PVC film and CR.View full abstractDownload PDF (547K) -
Vulcanization of Halogen-Containing Rubber with CyclohexasulfideTakenori ISHIDA, Takeshi KONDO, Syuji IMAI, Hiroshi SAMEJIMA, Mitsuo A ...2000 Volume 73 Issue 5 Pages 259-266
Published: 2000
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESS7-n-Butylamino-7-phenyl-8-thioxo-1, 2, 3, 4, 5, 6-hexa thiocane(BPTH) derivative has been prepared by treating p-substituted acetophenon, n-butyl or n-propyl amine and sulfur. The vulcanization in the presence of BPTH has been investigated for examining the ability of BPTH as valcanizing agent for NR, CR and halogen containg rubber, as compared to commomly used vulcanizing agents. BPTH was found to give good vulcanized rubber without using any vulcanization acceleators. The apparent characteristic feature of the vulcanization is disulfide type crosslinking and low free sulfur. For CR the apparent charactristic feature of the vulcanization has good heat resistance as well as EU and effect of substitute by active parameter did not find. But crosslinking was found to occur at thio-keton base and cyclohexasulfide base. More, BPTH was found to be effective as vulcanizing agent for CO, CM, ACM.View full abstractDownload PDF (845K) -
Relationship between the Frictional Property of Studless-Tires on Icy Roads and the Friction Coefficient-slip Ratio CurvesKenhachi MITSUHASHI, Seiji IGA, Yoshiyuki HASHIMOTO, Toshiyuki IKEDA, ...2000 Volume 73 Issue 5 Pages 267-273
Published: 2000
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSFor elucidating the tread wear mechanism of studdless tires on the icy road, we have conducted, μ-S curve analysis which principally yields the relationships between the friction coefficient, μ, and the slip ratio, S, and deformation analysis of small rubber blocks located between the sipes.
Then the following results were obtained.
1) μ-S curve can be formulated by the following regression equation;
μ=(a•Sb-c)•exp(-Sd)+c•exp(Se)
Where, μ is friction coefficient, S is slip ratio, and a, b, c, d and e are coefficients.
2) Resulted relationships between the shape of μ-S curve and tire performance on the icy road indicate that the tire performance enhances with loosening the sharpness of the μ peak shape.
3) The deformation analysis of small rubber blocks have reached an modified formula in which the degree of small rubber block deformation can be shown by an addition of bending deformation and the compression-shearing deformations. Using this formula, an amended equation of relationships between an inclined angle of the block and friction coefficient can be obtained, μ rock value obtained from dimensions of small rubber blocks of test tires with various number of sipes and from their modulus has corresponded with one obtained from substituting 100% for slip ratio in, μ-S curve regression equation. This verifies the effectiveness of the formula.View full abstractDownload PDF (849K) -
Toshiki Shimizu, Masatoshi Tosaka, Masaki Tsuji, Shinzo Kohjiya2000 Volume 73 Issue 5 Pages 274-276
Published: 2000
Released on J-STAGE: July 09, 2007
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...2000 Volume 73 Issue 5 Pages 277-278
Published: 2000
Released on J-STAGE: July 09, 2007
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[in Japanese]2000 Volume 73 Issue 5 Pages 280-281
Published: 2000
Released on J-STAGE: July 09, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (250K)
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