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.
Colloidal products such as milk, sports drinks, lotions, inks and woodworking adhesives often aggregateand so their performance is degraded. When the particles aggregate, the texture and appearance becomeworse. For example, aggregated pigment particles in ink cause color defects, color unevenness, and cracking.Therefore, it is important to evaluate the dispersion stability of colloidal products. Zeta potential is avery useful parameter for evaluating the dispersion stability of colloids. Basic theory about zeta potentialmeasurement are introduced in this review.
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.