コントラスト変調小角中性子散乱法による膨潤ゴムの構造解析 [in Japanese] Structure Analyses of Swollen Rubber Systems by Contrast Variation SANS [in Japanese]
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The polymer layers adsorbed on silica particles in rubber-silica systems have investigated with contrast variation small-angle neutron scattering (SANS) method. Specimens were swollen by the solvents having various scattering length densities, and their scattering intensities were measured. The contrast variation SANS for the specimens yielded partial scattering functions: the scattering function for polymer-polymer correlation <i>S<sub>PP</sub></i>(<i>q</i>), the scattering function for silica- silica correlation <i>S<sub>SS</sub></i>(<i>q</i>), and the scattering function for polymer- silica correlation <i>S<sub>PS</sub></i>(<i>q</i>). <i>S<sub>SS</sub></i>(<i>q</i>) reflects hierarchical structures formed by silica particles. The analyses of <i>S<sub>PS</sub></i>(<i>q</i>) and <i>S<sub>SS</sub></i>(<i>q</i>) explored the existence of dense polymer layers around silica aggregates. Several characteristic parameters such as the size of aggregates, the thickness of layers, the volume fractions of polymer of layers and matrix, and the correlation length of the matrix network are estimated from the analyses. The contrast variation SANS is found to be a powerful tool of the analyses of the structures of the rubber-filler systems.
GOMU 81(8), 334-338, 2008-08-15
THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN