Journal of The Adhesion Society of Japan
Online ISSN : 2187-4816
Print ISSN : 0916-4812
ISSN-L : 0916-4812
Volume 55 , Issue 7
Showing 1-3 articles out of 3 articles from the selected issue
  • Yoshinobu NAKAMURA, Yusuke KASHIHARA, Tomoyasu HIRAI, Syuji FUJII
    2019 Volume 55 Issue 7 Pages 271-277
    Published: July 01, 2019
    Released: July 30, 2019

    Some results of structural analyses for interfacial phase of particle-filled composite and pressure-sensitiveadhesive( PSA) using the 1H pulse nuclear magnetic resonance( pulse NMR) measurement were reviewed.The influence of loading method of silane coupling agent on the mechanical properties of silica-filled rubbercomposite were investigated. It was higher in the integral blend method than in the pre-treatment method. Thereason was clarified by the relaxation spectrum for the unvulcanized silica/rubber mixture. The crosslinkedpoly( n-butyl methacrylate) particles were dispersed in poly( vinyl chloride). This pair is completely miscible,whereas mutual diffusion of both polymers is restricted within the interfacial phase by the crosslinking points.The interfacial thickness was estimated using the pulse NMR. Tackifier exists as both dissolved moleculeand agglomerated particle in PSA. The relative ratio of agglomerated particle is able to estimate using thedifference spectrum of pulse NMR. From the comparison of difference spectra for vulcanized rubber andcrosslinked polyacrylic PSA, the restriction of molecular mobility by the intermolecular interaction was foundto be far larger in PSA than in the vulcanized rubber.

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Original Paper
    2019 Volume 55 Issue 7 Pages 254-265
    Published: July 01, 2019
    Released: July 20, 2019

    In order to express buckling of adhesive joints, buckling using Winkler's elastic foundation model isanalyzed. When a compressive load is applied to a beam on the elastic foundation, buckling occurs at muchhigher load than when the beam is compressed as a single body. However, in complete system bucklinganalysis assuming ideal compressive load, deformation in the compression process cannot be discussedalthough buckling load and buckling mode are obtained. In this paper, adherend deformation and bucklingmode shift due to initial imperfection is investigated with incomplete system buckling analysis assuming theinitial imperfection. Additionally, the phenomena that could occur in the buckling of the adhesive joints isexperimentally discussed.

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