高分子準希薄溶液の濃度揺らぎの緩和過程における粘弾性効果に関する研究(基研研究会「ソフトマターの物理学」,研究会報告)

Abstract

We investigated the viscoelastic effects on the relaxation processes of concentration fluctuations in semidilute polymer solution where the stress and diffusion are coupled. It was found that the dynamic structure factor obtained by dynamic light scattering (DLS) can be expressed by the sum of exonential decay since the stress affected the decy processes. The dynamics structure factor obtained by DLS agrees with that calculated by using Doi-Onuki theory with viscoelastic data. This agreement confirms that Doi-Onuki theory can well described the dynamics of the early stage SD in polymer solution.