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Volume 67, Issue 3
Displaying 1-10 of 10 articles from this issue
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[in Japanese]1994 Volume 67 Issue 3 Pages 163-179
Published: 1994
Released on J-STAGE: July 09, 2007
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[in Japanese]1994 Volume 67 Issue 3 Pages 180-181
Published: 1994
Released on J-STAGE: July 09, 2007
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[in Japanese]1994 Volume 67 Issue 3 Pages 182-189
Published: 1994
Released on J-STAGE: July 09, 2007
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1994 Volume 67 Issue 3 Pages 190-191
Published: 1994
Released on J-STAGE: July 09, 2007
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Kazuyuki KABE, Masataka KOISHI, Takashi AKASAKA1994 Volume 67 Issue 3 Pages 192-197
Published: 1994
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSSince FRR undergoes larger deformation than FRP, the twisted cords, which are made of nylon, aramid, steel and so on, have been used in FRR structures to improve the fatigue properties.
In this paper, the tensile modulus of FRR column with a twisted cord is analyzed first by neglecting the effect of rubber and then by Finite Element Analysis (FEA) with the consideration of stresses and strains of both cord and rubber. In particular, the effects of the pitch length of the twisted cord and the rubber modulus of the tensile stiffness of the FRR column is studied theoretically and experimentally.
Good correlations are obtained among the FEA and the experimental results for the tensile modulus of a FRR column. Analytical results is higher than these results.View full abstractDownload PDF (786K) -
Hiroshi YOKOI, Tadaoki OKUMOTO, Katsumasa TAKEUCHI, Hideyuki IMAI1994 Volume 67 Issue 3 Pages 198-206
Published: 1994
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSA rubber vibration insulator was composed of rubber and steel metal fittings which are prepared by rubber to metal bonding under vulcanization. To evaluate the performance of the adherends under a corrosive environment, the adherends were elongated by inserting the spacer in the gap between the steel plates before corrosion test. The corrosion tests such as hot water dip test, salt solution dip test and salt spray test were carried out and bonding degradation factors in corrosive environment were studied to find diffetences in degradation between these tests. Resulting from these tests difference in the failure of bonding between hot water test and salt dip test was not found, while the salt spray test was found to be the most severe. The failure of bonding in the salt spray test was acceralated by test time and the bonding layer was completely destroyed for 1400 hours. The reason is supposed to be due to the effect of oxygen in the salt spray test The phosphated treatment of metal surfaces was superior to grit blasting treatment for adhesion performance in corrosive environment. It is concluded that failure of bonding in corrosive environment is attributable to the reaction of corrosive elements (H2O, O2, e-) on the surface of steel plates in the presence of oxygen in the air and NaCl.View full abstractDownload PDF (1122K) -
Katsumi SANDO, Shinzo YAMASHITA, Shinzo KOHJIYA1994 Volume 67 Issue 3 Pages 207-218
Published: 1994
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSTo increase the reinforceing effect of glass short fiber towards butadiene rubber, the reaction of 1-chlorobutadiene-butadiene rubber (CB-BR) onto the glass short fiber was carried out using N-(2-aminoethyl) piperadine (AEP) and/or diepoxy compound (DEP) as novel non-sulfur curatives. Styrene-butadiene rubber carrying hydroxyl groups (HCB-SBR) was prepared by hydrolyzing 1-chlorobutadiene-styrene-butadiene rubber, and was used as a material to study the effect of interface reaction of glass short fiber by diisocyanate (I) cure system. The vulcanizates compounded with 0-22% volume fraction (Vf) of the filler treated with or without aminosilane coupling agent (AS) were prepared and their physical properties were investigated. The AEP-DEP vulcanizate of CB-BR compounded with AS-treated glass short fiber showed the highest relative network-chain density (νF/ν0=10.9, Vf=0.17) and tensile strength at break (TB; 3.2 MPa, Vf=0.17). Among HCB-SBR vulcanizates, the higher νF/ν0 and TB were obtainable by the I cure system. It is estimated that the chemical bonding between CB-BR or HCB-SBR and glass short fiber is present, which would be the reason of the higher properties of the above vulcanizate. The reaction mechanisms involving CB-BR or HCB-SBR, the curatives, and the glass short fiber were discussed on the basis of the corelation between network-chain density or tensile modulus of the vulcanizate and volume fraction of the filler.View full abstractDownload PDF (1261K) -
Hideyuki SASAKI, Takatoshi KOUNO, Takashi KOMUKAI, Koji SEGAWA, Ichiro ...1994 Volume 67 Issue 3 Pages 219-225
Published: 1994
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSThis works is carried out in order to find the new method for the adhesion of metal plates and plastic in insert-molding, that is, adhesion of ABS resin to phospher bronze plate treated in 1, 3, 5-triazine-2, 4-dithiol-6-sodium merucaptid (TTN) aqueous solution was investigated.
Each test plates were immersed in TTN solutions at 30°C for 1-60sec.. By immersing, the films of 50-800 A were formed on the phospher bronze plates. And then, the plates treated in TTN solution were inserted in mold and ABS resin was injected.
As a results, under following coditions: cocentration of TTN was 0.8-1×10-3mol/l, immersion time was 10-60sec. and mold temperature was 80°C, the adhesive strength showed about 4Mpa with braking ABS resin on the phospher bronze plate.
On the other hand, the adhesive strength was affected with polybutadiene content in ABS resin and the highest adhesive strength was observed in 18-20% polybutadiene content.
And it was supposed that this adhesive strength was due to formation of the chemical bonding between butadiene in ABS resin and Cu-triazine mercaptide in thick films on phospher bronze plate.View full abstractDownload PDF (953K) -
Eisuke YAMADA, Shinji INAGAKI, Hiroshi OKAMOTO, Junji FURUKAWA1994 Volume 67 Issue 3 Pages 226-232
Published: 1994
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSThe active fillers were prepared by the reaction of aluminum chloride with organic carboxylic acid containing hydroxy and amino groups. They were used as modifier of chlorine-containing elastomers, and their compounding effects were investigated. By loading these fillers, the compounding processibility of elastomers were improved, the curing reaction were accelerated, and the tensile properties and heat resistance of vulcanizates were improved tremendously.View full abstractDownload PDF (643K) -
[in Japanese]1994 Volume 67 Issue 3 Pages 233-234
Published: 1994
Released on J-STAGE: July 09, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (279K)
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