English Abstract
Structure Analyses of Swollen Rubber Systems by Contrast Variation SANS
Mikihito TAKENAKA1,
Naoya AMINO2,
Yasuhiro ISHIKAWA2,
Satoshi KOIZUMI3
1 Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan,
2 The Yokohama-rubber Company, Ltd., Hiratsuka, Kanagawa, Japan,
3 Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
Nippon Gomu Kyokaishi,(2008),81(8),334-338 Original Paper in Japanese

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 SPP(q), the scattering function for silica- silica correlation SSS(q), and the scattering function for polymer- silica correlation SPS(q). SSS(q) reflects hierarchical structures formed by silica particles. The analyses of SPS(q) and SSS(q) 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.

(Received on March 11, 2008)
(Accepted on June 4, 2008)

Contrast Variation Small-angle Neutron Scattering, Hierarchical Structure