NIPPON GOMU KYOKAISHI
Print ISSN : 0029-022X
Search
Advanced search
OR
Browse
Search
Volume 89, Issue 5
Displaying 1-5 of 5 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
General Reviews
  • Analysis of Depth-dependence and Orientation Behavior of Micro-phase Separated Structure of Block Copolymer Thin Films Investigated with GISAXS Measurement Utilizing Low Energy X-rays
    Itsuki SAITO, Katsuhiro YAMAMOTO
    2016 Volume 89 Issue 5 Pages 121-128
    Published: 2016
    Released on J-STAGE: July 27, 2016
    DOIhttps://doi.org/10.2324/gomu.89.121
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In this review, we demonstrated grazing-incidence small-angle X-ray scattering (GISAXS) measurement with tender X-ray to achieve depth-resolved structure analysis of block copolymer systems, polystyrene-b-poly (2-vinylpyridine)(S2VP) and poly (methyl methacrylate)-b-poly (n-butyl acrylate) thin films (approximately 300 - 400 nm in thick). In the case of using tender X-rays, the penetration depth of X-rays in the vicinity of critical angle of total reflection becomes gentle as compared to the case of using hard X-rays. Herein, X-ray energies of 2.40 keV and 4.36 keV were employed to conduct depth-resolved structure analysis. The experimental full width at half maximum (FWHM) magnitudes of a diffraction spot was investigated to estimate the penetration depth. The incident angle dependence of experimental FWHM magnitudes indicated the same tendency as the FWHM values calculated with Laue function considering attenuation decay, meaning that the penetration depth was controlled by varying incident angles. Depth-resolved structure analysis revealed that in the case of the completely oriented thin film, micro-phase separated structures slightly deformed along the depth direction in the inside of the thin film and the deformation gradually relaxed near the surface.
    View full abstract
    Download PDF (2153K)
Advanced Course on Rubber Science and Technology
  • Industrial Synthetic Method of the Rubbers
    11.Living Radical (Carbocationic) Block-copolymer
    Kenichi YOSHIHASHI
    2016 Volume 89 Issue 5 Pages 129-133
    Published: 2016
    Released on J-STAGE: July 27, 2016
    DOIhttps://doi.org/10.2324/gomu.89.129
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    New thermoplastic elastomers are produced by living radical polymerization and living carbocationic polymerization. SIBS is produced by living carbocationic block copolymerization of isobutylene monomer and styrene. SIBS has superior gas barrier, thermal stability and energy absorption capability. Styrene content, molecular weight and hardness are influence the mechanical properties of SIBS. The melt viscosity of SIBS is lower than other TPSs and SIBS is also softer without added oils than other TPSs. The product is utilized in the applications such as hot melt PSA, adhasives, dampening components etc. Thermoplastic elastomers based on acrylic block copolymer is prepared by atom transfer radical polymerization which is one of the living radical polymeization.
    View full abstract
    Download PDF (979K)
  • Variation of the States of Rubber
    1. The States of Rubber : Crosslinking and Chain Scission
    Asahiro AHAGON
    2016 Volume 89 Issue 5 Pages 134-139
    Published: 2016
    Released on J-STAGE: July 27, 2016
    DOIhttps://doi.org/10.2324/gomu.89.134
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Mechano-chemical reaction is a source of network structure variation. Chain scission followed by cross-linking occurs during mixing of compounds and during service of rubber goods due to deformation of the rubber parts. The mechano-chemical crosslinking during mixing is considered to be responsible for bound rubber formation of which variation causes variation of effective crosslink density among the compounds of the same formulation. The mechano-chemical reaction in cured rubber enhances oxidation of the rubber.
    View full abstract
    Download PDF (1294K)
Series of Symposium on Rubber Techniques
Technical Note
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top