Institute of Solid State Research, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany.
Langmuir. 2010 Nov 16;26(22):17444-8. doi: 10.1021/la102667k. Epub 2010 Oct 19.
The structure and dynamics of poly(ethylene oxide) adsorbed on dispersed clay platelets are investigated by small-angle neutron scattering and neutron spin-echo spectroscopy. The intermediate scattering function has a mobile contribution described by the Zimm theory and an immobile contribution that is constant within the time window. The immobile fraction as a function of the scattering vector Q is described by a Lorentz function, from which a localization length is determined. The relaxation rates grow with polymer concentration in agreement with dielectric measurements but contrary to pure polymer gels.
通过小角中子散射和中子自旋回波光谱研究了分散粘土板上吸附的聚环氧乙烷的结构和动力学。中间散射函数具有由 Zimm 理论描述的可移动贡献和在时间窗口内恒定的不可移动贡献。不可移动部分作为散射矢量 Q 的函数由洛伦兹函数描述，由此确定定位长度。弛豫速率随聚合物浓度的增加而增加，与介电测量一致，但与纯聚合物凝胶相反。
