All issues
Predecessor
Volume 43, Issue 4
Displaying 1-7 of 7 articles from this issue
- |<
- <
- 1
- >
- >|
-
[in Japanese]1970 Volume 43 Issue 4 Pages 241-272
Published: 1970
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSDownload PDF (2686K) -
[in Japanese]1970 Volume 43 Issue 4 Pages 273-291
Published: 1970
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSDownload PDF (2064K) -
R. Yamamoto, T. Shichimi, T. Sekine, M. Kiumi1970 Volume 43 Issue 4 Pages 300-306
Published: 1970
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSTriallylphenol, diallyl-p-cresol and allyl-propyl-p-cresol were found to be useful reactive antioxidants for rubber. Rubber vulcanizates compounded with these antioxidants were apparently more reluctant to oxidative deterioration than those compounded with dipropyl-p-cresol (a model of usual antioxidants). Their antioxidative action was not seriously affected when the sample vulcanizates were subjected to acetone extraction. It is apparent that the allylphenol derivatives become combined with rubber matrix during the vulcanization process, thus making vulcanizates highly resistive to oxidation for long aging time.View full abstractDownload PDF (498K) -
DINITRONE-VULCANIZATION WITH TEREPHTHALALDEHYDE AND PHENYL HYDROXYLAMINES. Nishita, J. Furukawa, S. Yamashita1970 Volume 43 Issue 4 Pages 307-312
Published: 1970
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSIt was found that 1, 3-dipolar addition to double bond is available for vulcanization of rubber. For example, terephthal-aldehyde (3.12phr) and phenyl hydroxylamine (5.07phr), whose molar ratio is 1:2, are capable of vulcanzing polybutadiene, SBR, Diene rubber and nitrile rubber at 150°C for 30 minuites to yield vulcanizates. Cross-linking efficiency was found to be 0.06-0.08 mole linking per mole of aldehydes. Carbon black ingredient is an efficient filler but it retards vulcanization. The reason for the retardation is elucidated by the experiment of addition towards styrene to be due to quinone group located on carbon black surface, because both carbon black and quinone retards the addition to styrene. This undesirable property is much improved by use of excess amount of terephthalaldehyde (8.3phr) and phenyl hydroxylamine (6.75phr), whose molar ratio is 1:1, and in this way a vulcanizate of high tensile property, 170kg/cm2 in tensile strength, 470% in elongation, is prepared.View full abstractDownload PDF (409K) -
VULCANIZATION OF RUBBERS BY TEREPHTHALONITRILE OXIDEJ. Hayashi, J. Furukawa, S. Yamashita1970 Volume 43 Issue 4 Pages 313-318
Published: 1970
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSIt was found that terephthalonitrile oxide is able to vulcanize various kinds of rubber containing unsaturated double bonds. Using terephthalonitrile oxide, diene rubbers, EPDM and other rubbers having double bonds were vulcanized rapidly at low temperature. For example, EPDM gum stock compounded with 1 phr of terephthalonitrile oxide was vulcanized at 130°C for 25 minutes to produce a vulcanizate having 43 kg/cm2 in tensile strength and 260% in elongation at break. Terephthalonitrile oxide is also effective towards carbon black stocks as well as gum stocks. It was also found that the crosslinking efficiencies of terephthalonitrile oxide evaluated from the swelling test are near unity for IR, SBR and EPDM.View full abstractDownload PDF (426K) -
[in Japanese]1970 Volume 43 Issue 4 Pages 319-321
Published: 1970
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSDownload PDF (217K) -
[in Japanese]1970 Volume 43 Issue 4 Pages 322-323
Published: 1970
Released on J-STAGE: April 16, 2008
JOURNAL RESTRICTED ACCESSDownload PDF (218K)
- |<
- <
- 1
- >
- >|