Polymer Chain Behavior in Polymer Nanocomposites with Attractive Interactions

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• 作者：Nicolas Jouault ; Michael K. Crawford ; Changzai Chi ; Robert J. Smalley ; Barbara Wood ; Jacques Jestin ; Yuri B. Melnichenko ; Lilin He ; William E. Guise ; Sanat K. Kumar
• 刊名：ACS Macro Letters
• 出版年：2016
• 出版时间：April 19, 2016
• 年：2016
• 卷：5
• 期：4
• 页码：523-527
• 全文大小：306K
• 年卷期：0
• ISSN：2161-1653

文摘

Chain behavior has been determined in polymer nanocomposites (PNCs) comprised of well-dispersed 12 nm diameter silica nanoparticles (NPs) in poly(methyl methacrylate) (PMMA) matrices by Small-Angle Neutron Scattering (SANS) measurements under the Zero Average Contrast (ZAC) condition. In particular, we directly characterize the bound polymer layer surrounding the NPs, revealing the bound layer profile. The SANS spectra in the high-q region also show no significant change in the bulk polymer radius of gyration on the addition of the NPs. We thus suggest that the bulk polymer conformation in PNCs should generally be determined using the high q region of SANS data.