Nanostructures and Dynamics of Macromolecules Bound to Attractive Filler Surfaces

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• 作者：Naisheng Jiang ; Maya K. Endoh ; Tadanori Koga ; Tomomi Masui ; Hiroyuki Kishimoto ; Michihiro Nagao ; Sushil K. Satija ; Takashi Taniguchi
• 刊名：ACS Macro Letters
• 出版年：2015
• 出版时间：August 18, 2015
• 年：2015
• 卷：4
• 期：8
• 页码：838-842
• 全文大小：295K
• ISSN：2161-1653

文摘

We report in situ nanostructures and dynamics of polybutadiene (PB) chains bound to carbon black (CB) fillers (the so-called 鈥渂ound polymer layer (BPL)鈥? in a good solvent. The BPL on the CB fillers was extracted by solvent leaching of a CB-filled PB compound and subsequently dispersed in deuterated toluene to label the BPL for small-angle neutron scattering and neutron spin echo techniques. The results demonstrate that the BPL is composed of two regions regardless of molecular weights of PB: the inner unswollen region of 鈮?0.5 nm thick and outer swollen region where the polymer chains display a parabolic profile with a diffuse tail. In addition, the results show that the dynamics of the swollen bound chains can be explained by the so-called 鈥渂reathing mode鈥?and is generalized with the thickness of the swollen BPL.