期刊
POLYMER JOURNAL
卷 45, 期 1, 页码 94-99出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/pj.2012.193
关键词
X-ray photon correlation spectroscopy; thermal gradient; polymer-grafted nanoparticle
The effects of a thermal gradient on the dynamical behavior of nanoparticles dispersed in a polymer matrix were studied using X-ray photon correlation spectroscopy. Polystyrene (PS)-grafted silica nanoparticles (SiNPs-PS), which are nanoparticles dispersed in a PS matrix controlled at temperatures above the glass transition temperature, were used in this study. Anisotropic motions of the SiNPs-PS were observed when the sample was kept in a conventional capillary tube, whereas isotropic motion was observed when the sample was kept in a newly designed cell with a low thermal flow, demonstrating the importance of the thermal gradient on the dynamical behavior of the SiNPs-PS. Polymer Journal (2013) 45, 94-99; doi: 10.1038/pj.2012.193; published online 21 November 2012
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