NIPPON GOMU KYOKAISHI
Print ISSN : 0029-022X
Volume 63, Issue 9
Displaying 1-8 of 8 articles from this issue
  • [in Japanese]
    1990 Volume 63 Issue 9 Pages 529-534
    Published: 1990
    Released on J-STAGE: July 09, 2007
    JOURNAL FREE ACCESS
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  • [in Japanese]
    1990 Volume 63 Issue 9 Pages 535-551
    Published: 1990
    Released on J-STAGE: July 09, 2007
    JOURNAL FREE ACCESS
    Download PDF (1963K)
  • [in Japanese]
    1990 Volume 63 Issue 9 Pages 552-560
    Published: 1990
    Released on J-STAGE: July 09, 2007
    JOURNAL FREE ACCESS
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  • 1990 Volume 63 Issue 9 Pages 561-565
    Published: 1990
    Released on J-STAGE: July 09, 2007
    JOURNAL FREE ACCESS
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  • GRAFTING REACTION OF IMIDAZOLINE GROUPS INTRODUCED ONTO CARBON BLACK SURFACE WITH SEVERAL FUNCTIONAL POLYMERS
    Norio TSUBOKAWA, Kazuhito YANADORI, Yasuo SONE
    1990 Volume 63 Issue 9 Pages 566-572
    Published: 1990
    Released on J-STAGE: July 09, 2007
    JOURNAL FREE ACCESS
    The grafting onto furnace black and acetylene black by the reaction of imidazoline groups introduced onto these carbon blacks with functional polymers having acyl chloride or epoxide groups was investigated. The introduction of imidazoline groups onto the surface was achieved by the treatment of carbon black with 2, 2′-azobis[2-(2-imidazolin-2-yl) propane]. Even if furnace black and acetylene black were reacted with acylchloride-capped poly(propylene glycol) (PPG-COCl), no grafting of PPG onto these carbon blacks was observed. On the contrary, when PPG-COCl was reacted with carbon black having imidazoline groups, PPG was found to graft onto the surface with amide bonds. The percentage of grafting increased with an increase of imidazoline group content of carbon black: the percentage of grafting of PPG onto Philblack I (imidazoline group content=0.30 mmol/g) was increased to 21.8%. The polymer-grafted carbon black gave a stable colloidal dispersion in organic solvents. The amount of imidazoline groups used for the grafting reaction was found to decrease with increasing molecular weight of PPG-COCl. Furthermore, the effect of temperature on the grafting reaction was discussed. In addition, the grafting of poly (glycidyl methacrylate-co-styrene) onto furnace black was achieved by the reaction of imidazoline groups on the surface with epoxide groups of the copolymer.
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  • STUDIES ON PHASE TRANSITION AND PARTICLE REINFORCING PROPERTY IN DISPERSED PARTICLES STRUCTURE
    Kunihiko FUJIMOTO, Hideo TAKAHASHI
    1990 Volume 63 Issue 9 Pages 573-584
    Published: 1990
    Released on J-STAGE: July 09, 2007
    JOURNAL FREE ACCESS
    The change of the physical property values and the stress relaxation due to the phase transition of the dispersed particles structure in SBR vulucanizates, in which the carbon blacks with different reinforcing property and CaCO3 without surface activity were compounded, were investigated.
    (1) Particle reinforcing property α is given by the equation in which
    α=2.5{1+(1+β)•C*}
    the unit volume fration of C phase C* and the restraint parameter β of molecular chain motion were introduced, and the particle reinforcing property α and the volume fraction of particles (Vf)c that the change of the physical property values due to the phase transition of dispersed particles structure are in the hyperbolic relation. (2) It was in ferred that the plastic elements of carbon black group rubber is proportinal to the volume fraction of C phase being formed around particles, and its stress relaxation is due to the structure-stabilizing process by the fracture of plastic elements and the transfer of particles to the stable configuration, on the other hand, the stress relaxation of CaCO3 group rubber without forming C phase is due to the secession process of rubber molecular chains at particle interfaces.
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  • Atsushi ONO, Kazuyuki MAEDA, Shinzo KOHJIYA, Shino YAMASHITA
    1990 Volume 63 Issue 9 Pages 585-591
    Published: 1990
    Released on J-STAGE: July 09, 2007
    JOURNAL FREE ACCESS
    Hydrolysis and the following polycondensation of chloroslanes were studied to elucidate the reaction conditions for the synthesis of reactive polysisiloxanes having prscribed molecular weights. The hydrolysis of chlorosilanes proceeded very rapidly as shown by the determination of evolved HiCl gas, which was followed by the polycondensation of silanol groups produced by the initial hydrolysis. GPC measurements on the resulted polysiloxanes revealed that the dilution of dichlorosilanes and the concentration of monochlorosilanes as end-blockers were effective to control the molecular weight of polysiloxanes. As cohydrolysis and co-condensation systems, dichloromethylvinylsilane (MVSi)/chlorodimethylvinysilsilane (DMVSi), dichlorodimethylsilane (DMSi)/chlorodimethylvinylsilane (DMVSi) and DMSi/dichlorocyanopropylmethylsilane (CPMSi) systems were investigated and the results were all positive for the purpose of molecular weight control. In the third system, the cyano groups were converted to carboxylic groups and polysiloxane having carboxylic groups and a prescribed molecular weight was resulted
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  • [in Japanese]
    1990 Volume 63 Issue 9 Pages 592-593
    Published: 1990
    Released on J-STAGE: July 09, 2007
    JOURNAL RESTRICTED ACCESS
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