title: X-ray irradiation induces local rearrangement of silica particles in swollen rubber.
abstract: X-ray photon correlation spectroscopy (XPCS) of swollen rubber containing spherical silica nanoparticles is reported. It is shown that irradiation by intense X-rays leads to the breakdown of cross-links, thereby inducing the local rearrangement of silica nanoparticles. This rearrangement process depends on the cross-link density and is characterized by a compressed exponential relaxation with aging behaviour, which resembles a common feature of complex fluids observed with XPCS.
authors.affiliation: Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan.
authors.forename: Yuya
authors.initials: Y
authors.lastname: Shinohara
authors.affiliation: Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan.
authors.forename: Naoko
authors.initials: N
authors.lastname: Yamamoto
authors.affiliation: Sumitomo Rubber Industries Ltd, 3-6-9 Wakinohamacho, Chuo, Kobe, Hyogo 651-0072, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kishimoto
authors.affiliation: Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan.
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Amemiya
keywords: X-ray photon correlation spectroscopy; filled rubber