NIPPON GOMU KYOKAISHI
Print ISSN : 0029-022X
Search
Advanced search
OR
Browse
Search
Volume 84, Issue 1
Displaying 1-8 of 8 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
Special Issue for General Reviews “Analyses of Soft Materials by Scattering Measurements”
Introductory Remarks
General Reviews
  • [title in Japanese]
    [in Japanese]
    2011 Volume 84 Issue 1 Pages 5-6
    Published: 2011
    Released on J-STAGE: June 07, 2011
    DOIhttps://doi.org/10.2324/gomu.84.5
    JOURNAL FREE ACCESS
    Download PDF (176K)
  • Analyses of Hierarchical Structures of Soft Materials by Using Combined Scattering Methods
    Mikihito TAKENAKA
    2011 Volume 84 Issue 1 Pages 7-13
    Published: 2011
    Released on J-STAGE: June 07, 2011
    DOIhttps://doi.org/10.2324/gomu.84.7
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Most of soft materials form hierarchical structures and their rich varieties of mechanical properties originate from the structures and the correlation among hierarchies. Here we discuss how we can analyze the hierarchical structures in soft materials by using the combination of various scattering methods. We describe the features of each scattering method briefly and show the examples of the analyses of soft materials with the combined scattering methods.
    View full abstract
    Download PDF (1026K)
  • Neutron Scattering of Soft Materials
    Mitsuhiro SHIBAYAMA
    2011 Volume 84 Issue 1 Pages 14-20
    Published: 2011
    Released on J-STAGE: June 07, 2011
    DOIhttps://doi.org/10.2324/gomu.84.14
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    It has already passed about 40 years since small-angle neutron scattering (SANS) technique was applied in structural analyses. SANS is now one of common tools in structure investigations of soft materials. In this article, we briefly describe the basis of neutron scattering, SANS instruments, and theories of SANS. Particularly, we focus on cross-link inhomogeneities and propose two methods. One is the visualization-by-swelling method and the other the contrast variation method. Then, we show several topics in structure investigations of elastomers, such as, natural rubbers and isoprene rubbers cross-linked by sulfur and peroxides.
    View full abstract
    Download PDF (875K)
  • X-ray Scattering Analyses on Deformation Behaviors of Thermoplastic Elastomers
    Shinichi SAKURAI
    2011 Volume 84 Issue 1 Pages 21-28
    Published: 2011
    Released on J-STAGE: June 07, 2011
    DOIhttps://doi.org/10.2324/gomu.84.21
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Deformation behaviors of thermoplastic elastomers and structural changes upon uniaxial stretching and upon the subsequent release of the stretching load, as revealed by in-situ measurements of X-ray scattering, are reviewed. Exclusively, the following three subjects are focused; (1) changes in packing regularity of glassy spherical microdomains in styrenic block copolymer samples upon uniaxial stretching and upon the subsequent release of the stretching load, (2) changes in nano-structures in styrenic block copolymer samples bearing glassy lamellar nano-structures upon uniaxial stretching and upon the subsequent release of the stretching load (fracture of the glassy nano-structures), and (3) ultra-small-angle X-ray scattering analyses of structural changes in elastomeric segmented polyurethaneureas upon uniaxial stretching (formation of crazes in sub-micron scale).
    View full abstract
    Download PDF (1147K)
  • Study on Strain-induced Crystallization of Cross-linked Natural Rubber Revealed by Synchrotron X-ray
    Yuko IKEDA
    2011 Volume 84 Issue 1 Pages 29-36
    Published: 2011
    Released on J-STAGE: June 07, 2011
    DOIhttps://doi.org/10.2324/gomu.84.29
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Characteristics of strain-induced crystallization (SIC) are described on sulfur cross-linked and peroxide cross-linked natural rubber (NR) and synthetic isoprene rubber (IR). Simultaneous tensile and wide-angle X-ray diffraction measurements using synchrotron radiation systems were carried out in order to elucidate SIC. The stretched molecular chains acted as initiating species of the crystallization, while surrounding chains contributed to the crystal growth. Stretching ratio at the onset of SIC (αc) decreased with an increase of network-chain density (ν) for peroxide cross-linked NR (P-NR), while it remained constant for sulfur cross-linked NR (S-NR). But, dependence of relative crystallization rates on ν was similar for both P-NR and S-NR. Calculated entropy differences between the undeformed and the deformed states at αc were equal for P-NR regardless of ν, whereas it became smaller with the increase of ν for S-NR. The SIC behavior of P-NR was in agreement with the prediction on homogeneous or uniform networks by Flory. Network in sulfur cross-linked IR (S-IR) was composed of domains of high ν value embedded in the rubbery network matrix, which gave a characteristic feature in its SIC. Mechanical propeties of S-NR and P-NR are also discussed from the viewpoint of their SIC behaviors on the basis of the network structures.
    View full abstract
    Download PDF (818K)
  • Studies on Polymer Thin Film Structure by X-ray and Neutron Reflectivity and Grazing Incidence Small Angle Scattering
    Hiroki OGAWA, Toshiji KANAYA
    2011 Volume 84 Issue 1 Pages 37-41
    Published: 2011
    Released on J-STAGE: June 07, 2011
    DOIhttps://doi.org/10.2324/gomu.84.37
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    We have reviewed structure studies of polymer thin films using synchrotron radiation X-ray and neutron reflectivity as well as recently developed grazing incidence small-angle X-ray and neutron scattering, including studies on polymer thin films with embedded ordered nanometer cells, distribution of glass transition temperature Tg in thin polystyrene films, and dewetting process of polymer blend thin films.
    View full abstract
    Download PDF (716K)
Technical Note
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top