Nguyen Hung K, Kawaguchi Daisuke, Tanaka Keiji
Department of Applied Chemistry, Kyushu University, Fukuoka, 819-0395, Japan.
Center for Polymer Interface and Molecular Adhesion Science, Kyushu University, Fukuoka, 819-0395, Japan.
Macromol Rapid Commun. 2020 Nov;41(21):e2000096. doi: 10.1002/marc.202000096. Epub 2020 May 27.
Dynamics of polymer chains near an interface with an inorganic material are believed to strongly affect the physical properties of polymers in nanocomposites and thin films. An effect of molecular architecture on the conformational relaxation behavior of polystyrene (PS) chains at the quartz interface using sum-frequency generation spectroscopy is reported here. The relaxation dynamics of chains in direct contact with the quartz interface is slower with a star-shaped architecture than that with its linear counterpart. The extent of the delay becomes more pronounced with increasing number of arms. This can be explained in terms of the superior interfacial activity to the quartz surface for the star-shaped PS.
人们认为，聚合物链在与无机材料界面附近的动力学对纳米复合材料和薄膜中聚合物的物理性质有强烈影响。本文报道了利用和频产生光谱研究分子结构对聚苯乙烯（PS）链在石英界面构象弛豫行为的影响。与线性结构的PS链相比，具有星形结构且直接与石英界面接触的链的弛豫动力学更慢。随着臂数增加，延迟程度变得更加明显。这可以用星形PS对石英表面具有更高的界面活性来解释。
