NIPPON GOMU KYOKAISHI

[title in Japanese]

[in Japanese]

2001 Volume 74 Issue 9 Pages 341-346
Published: 2001
Released on J-STAGE: May 28, 2007

DOIhttps://doi.org/10.2324/gomu.74.341

JOURNAL FREE ACCESS

Download PDF (916K)
[title in Japanese]

[in Japanese]

2001 Volume 74 Issue 9 Pages 347-351
Published: 2001
Released on J-STAGE: May 28, 2007

DOIhttps://doi.org/10.2324/gomu.74.347

JOURNAL FREE ACCESS

Download PDF (863K)
[title in Japanese]

[in Japanese], [in Japanese]

2001 Volume 74 Issue 9 Pages 352-356
Published: 2001
Released on J-STAGE: May 28, 2007

DOIhttps://doi.org/10.2324/gomu.74.352

JOURNAL FREE ACCESS

Download PDF (1571K)
[title in Japanese]

[in Japanese]

2001 Volume 74 Issue 9 Pages 357-358
Published: 2001
Released on J-STAGE: May 28, 2007

DOIhttps://doi.org/10.2324/gomu.74.357

JOURNAL FREE ACCESS

Download PDF (281K)
[title in Japanese]

[in Japanese]

2001 Volume 74 Issue 9 Pages 359-360
Published: 2001
Released on J-STAGE: May 28, 2007

DOIhttps://doi.org/10.2324/gomu.74.359

JOURNAL FREE ACCESS

Download PDF (283K)
[title in Japanese]

[in Japanese]

2001 Volume 74 Issue 9 Pages 361-362
Published: 2001
Released on J-STAGE: May 28, 2007

DOIhttps://doi.org/10.2324/gomu.74.361

JOURNAL FREE ACCESS

Download PDF (693K)
Controlling of Higher Order Structure and Friction/Abrasion of Polyurethane by Surface Modification Part 3

Surface Modification by IPN of Polyurethane Elastomers with Florin-Containing Polymethacrylate

Mutsuhisa FURUKAWA, Takahiko OKAZAKI

2001 Volume 74 Issue 9 Pages 363-367
Published: 2001
Released on J-STAGE: May 28, 2007

DOIhttps://doi.org/10.2324/gomu.74.363

JOURNAL FREE ACCESS

Show abstractHide abstract

Surface layer of Polyurethanene elastomers (PUEs) was modified by the use of 1H, 1H, 5H-Octafluoropentyl-methacrylate(OFPMA). The based PUE was prepared from poly(oxytetramethylene)glycol (PTMG, Mn=2037), 4, 4'-diphenyl methane diisocyanate(MDI), and 1, 4-butanediol(BD)/ trimethylolpropane (TMP). OFPMA and ethylene glycol dimethacrylate (EGDMA) were penetrated into the surface layer of PUE and polymerized. Morphology, friction and abrasion characterization of the modified PUEs were studied by means of FT-IR, polarizing microscope, SEM, contact angle tester, Heidon 14 friction tester and DIN abrasion tester. The modified PUEs exhibited lower friction coefficient and better abrasion resistance compared with the unmodified PUE. The mechanism of the improvement was discussed.

View full abstract

Download PDF (1380K)
Direct Adhesion between Polymer Plated Metals and Rubbers during Vulcanization, Part 2

Direct Adhesion between Polymer Plated Magnesium Alloy AZ91D and Acrylic Rubber during Vulcanization

Peng GONG, Kunio MORI, Yoshiyuki OISHI

2001 Volume 74 Issue 9 Pages 368-373
Published: 2001
Released on J-STAGE: May 28, 2007

DOIhttps://doi.org/10.2324/gomu.74.368

JOURNAL FREE ACCESS

Show abstractHide abstract

The non-adhesive and corrosive magnesium alloy AZ91D can be adhered directly to acrylic rubber (ACM) during vulcanization through the polymer plating of AZ91D in 2-diallylamino-1, 3, 5-triazine-4, 6-dithiol monosodium (DAN) aqueous solutions. The triazine thiol film can be plated stably onto AZ91D only in the strong base solutions, though the anodic oxides such as Mg(OH)₂ and MgO are formed simultaneously in the polymer plating process. The peel strength of the adherend of the polymer plated AZ91D to ACM is dependent strongly upon the absolute and relative content of the triazine thiol composition in the plating layer. Increasing the concentration of NaOH in the electrolytic solution, the composition ratio of triazine thiol to anodic oxides in the plating layer decreases and thereby the peel strength of the adherend decreases accordingly. Adding Na₂CO₃ into the electrolytic solution containing low concentration of NaOH, the composition ratio of triazine thiol to anodic oxides, and consequently the peel strength of the adherend can be increased. Moreover, in order to obtain adherend with high peel strength, AZ91D should be polymer plated in the optimum range of current density and time, and at low temperature under 20°C. The adherend has good heat aging resistance and excellent oil resistance.

View full abstract

Download PDF (964K)
Effect of Adding Hindered Nickel Salts on Adhesion of Metal to Rubber, Part 1

Effect of Surface Treatment on Direct Adhesion of Magnesium Alloy to Rubber

Xiaodong SHI, Kunio MORI, Hidetoshi HIRAHARA, Yoshiyuki OISHI

2001 Volume 74 Issue 9 Pages 374-379
Published: 2001
Released on J-STAGE: May 28, 2007

DOIhttps://doi.org/10.2324/gomu.74.374

JOURNAL FREE ACCESS

Show abstractHide abstract

Mg alloys (AZ31) have been treated with various aqueous alkali or acid solution, and then were adhered to SBR-NR rubber. After treatment with aqueous NaOH, it was found that oxidation of Mg is promoted and extra hydroxides are formed in the top layers of Mg alloys in thickness about 70nm. In this case, extremely high adhesion strength was obtained, and the peel strength of rubber-Mg samples increased with higher treatment temperature or longer treatment time, may be due to the increasing thickness of hydroxide layers. The rubber-to-Mg interface was analyzed by XPS depth profile following vulcanization of rubber against a Mg alloy surface. From the interface analysis results, it is suggested that the extra hydroxides formed in the top layers of Mg alloys can reduce the formation of ZnS at interface, since the hydroxides react with stearic acid in rubber and it seems to compete against the reaction between ZnO and stearic acid during vulcanization.

View full abstract

Download PDF (1030K)
Network Structures in Peroxide-crosslinked EPDM Examined by Dynamic Viscoelasticity and Pulsed NMR

Hitoshi IWABUKI, Soji KODAMA, Toru NOGUCHI, Takayuki UTSUMI

2001 Volume 74 Issue 9 Pages 380-381
Published: 2001
Released on J-STAGE: May 28, 2007

DOIhttps://doi.org/10.2324/gomu.74.380

JOURNAL FREE ACCESS

Download PDF (334K)

Register with J-STAGE for free!