NIPPON GOMU KYOKAISHI
Print ISSN : 0029-022X
Search
Advanced search
OR
Browse
Search
Volume 42, Issue 10
Displaying 1-9 of 9 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • A STUDY ON DETERIORATION AND STABILIZATION OF BR AND IR
    REPORT 2 THERMAL OXIDATION AND THERMAL ANALYSIS
    M. Tanaka, T. Sawata, T. Takanashi
    1969 Volume 42 Issue 10 Pages 841-846
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.841
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Through thermal oxidation of raw rubbers BR and IR containing high cis 1.4, followed by their thermal analysis, the structural changes in them through deterioration by oxidation have been studied considering the changes in weight and molecular weight, and the results of elemental analysis and infra-red analysis.
    We interpret the structural changes in raw rubbers BR and IR during heat aging as the fundamental aging properties of rubbers. As for the stability to pyrolytic decomposion, oxidized BR is sharply reduced by the bridge structures with oxygen, while the influence of oxygen upon IR is not so remarkable as that upon BR because the natural chain scission reaction of IR predominates in itself.
    View full abstract
    Download PDF (458K)
  • A STUDY ON DETERIORATION AND STABILIZATION OF BR AND IR
    REPORT 3 THERMAL OXIDATION AND THERMAL ANALYSIS OF ANTIOXIDANT-CONTAINING BR, IR
    M. Tanaka, T. Sawata, M. Morishita
    1969 Volume 42 Issue 10 Pages 847-850
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.847
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Thermal oxidation-inhibiting effect of mainly amine base anti-oxdant as added to crude, BR, IR has been investigated by thermal analysis, and changes in molecular weight and weight. As the result it has been confirmed that the growth of unstable structure is less in the crude rubbers containing the anti-oxidant that in ones not containing it, testifying to the remarkable effect of inhibiting spontaneous oxidizing reaction. Weight changes after a long period of thermal oxidation suggest that in most cases the change is steady, but in PANA or PBNA, a sharp increase in weight is observed in the latter half of the period, probably on account of the anti-oxidant having evaporated in the course of thermal oxidation and lost its inhibitive effect.
    View full abstract
    Download PDF (319K)
  • QUANTITATIVE ANALYSIS OF THREE COMPONENT BLENDED RUBBERS OF NR-SBR-BR WITH GAS CHROMATOGRAPHY
    K. Tsuge, I. Ando, N. Okubo
    1969 Volume 42 Issue 10 Pages 851-855
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.851
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A quantitative analysis of 3-component blended rubbers of NR-SBR-BR was carried out by pyrolysis gas chromatography using a triangular diagram.
    The samples were directly pyrolyzed in a carrier gas stream at 560°C. The calibration curve of the triangular diagram was obtained from the relative peak areas in the gas chromatogram of isoprene, styrene and butadiene which were the pyrolysis products.
    The errors in the analysis of blended rubbers were within 5%, and the time required for the analysis was about 30 minutes.
    The analytical method described here is a new method for the analysis of 3-component blended rubbers of NR-SBR-BR.
    View full abstract
    Download PDF (375K)
  • RAPID ANALYSIS OF VULCANIZED RUBBER BY PYROLYSIS GAS CHROMATOGRAPHY
    Y. Namiki, H. Nishizawa, M. Morita
    1969 Volume 42 Issue 10 Pages 856-863
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.856
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    We performed vulcanized rubbers identification, by use of a commercial pyrolyzer attached to the entrance of the chromatograph, which is simple, rapid, and practical.
    This method is applicable to the routine works, since it can be carried out with the same operating condition in about 20 minutes.
    This method can be used the following purposes:
    (1) Identification of most commercial vulcanized rubbers (18 different elastomers).
    (2) Identification of typical curing systems, such as CR, IIR.
    (3) Simple quantitative analysis of copolymer composition, such as SBR, NBR, EPDM.
    (4) Identification of some typical plasticizers.
    View full abstract
    Download PDF (566K)
  • [title in Japanese]
    [in Japanese]
    1969 Volume 42 Issue 10 Pages 864-868
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.864
    JOURNAL FREE ACCESS
    Download PDF (371K)
  • [title in Japanese]
    [in Japanese]
    1969 Volume 42 Issue 10 Pages 869-876
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.869
    JOURNAL FREE ACCESS
    Download PDF (1385K)
  • [title in Japanese]
    [in Japanese]
    1969 Volume 42 Issue 10 Pages 877-889
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.877
    JOURNAL FREE ACCESS
    Download PDF (1431K)
  • [title in Japanese]
    [in Japanese]
    1969 Volume 42 Issue 10 Pages 904-905
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.904
    JOURNAL RESTRICTED ACCESS
    Download PDF (243K)
  • Erratum
    1969 Volume 42 Issue 10 Pages 905
    Published: 1969
    Released on J-STAGE: April 16, 2008
    DOIhttps://doi.org/10.2324/gomu.42.10_905
    JOURNAL RESTRICTED ACCESS
    Download PDF (174K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top