Seikei-Kakou
Online ISSN : 1883-7417
Print ISSN : 0915-4027
ISSN-L : 0915-4027
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Volume 16, Issue 6
Displaying 1-15 of 15 articles from this issue
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Index
Preface
Technical Notes : Special Issue on Microscopic Analysis
Technical Report
Report from Universities and Institusions in Japan : 126
Report from Oversea Universities and Institutions : 64
Report of International Meeting
Topic on Products and Technologies
Original Papers
  • Thermo-Viscoelastic Properties of Adhesives used for Electronic Devices in Curing Processes
    Shozo Nakamura, Yusuke Sakata, Yusuke Sembo, Shigeo Nishi
    2004 Volume 16 Issue 6 Pages 386-390
    Published: June 20, 2004
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.4325/seikeikakou.16.386
    JOURNAL FREE ACCESS
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    Thermo-viscoelastic and tensile properties during the cure of adhesives used for electronic devices were evaluated. It was clarified that the dynamic viscoelastic and tensile properties depend on holding times and that these properties are affected by the curing processes. Specifically, the tensile strength and elastic modulus will increase, but the fracture strain will decrease as the heating time becomes long. These tensile properties correspond with thermo-viscoelastic behavior and fracture patterns.
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  • Study on Viscoelasticity and Morphology of PP/PE Blends under Shear Flow
    Seiji Shiromoto, Kiyohito Koyama
    2004 Volume 16 Issue 6 Pages 391-396
    Published: June 20, 2004
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.4325/seikeikakou.16.391
    JOURNAL FREE ACCESS
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    The relationship between viscoelastic behavior and morphology change under shear flow for polypropylene (PP) and polyethylene (PE) blends was investigated. Polymer blends comprising of a propylene block-copolymer and 4 high-density polyethylenes with different molecular weights were used for this study. The obtained results are as follows. (1) Deformation of the dispersed droplets was lower as the shear visocosity ratio of the dispersed phase to the continuous phase became higher. (2) Swelling ratio of the PP/PE blends depended on the deformation of the dispersed phase, shear viscosity ratio and interfacial tension. (3) Swelling ratio behavior can be controlled by morphology changes affecting the shear viscosity ratio.
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