Collective dynamics of an end-grafted polymer brush in solvents of varying quality.
Collective dynamics of an end-grafted polymer brush in solvents of varying quality.
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末端接枝聚合物刷在不同质量溶剂中的集体动力学。
DOI：
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发表时间：
2004
影响因子：
8.6
通讯作者：
G. Fytas
中科院分区：
文献类型：
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作者：
G. Yakubov;Benoit Loppinet;Haining Zhang;Jürgen Rühe;R. Sigel;G. Fytas
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The dynamic structure of a chemically end-grafted polystyrene brush bathed in solvents of varying interactions was studied by evanescent wave dynamic light scattering. It reveals distinct behavior under good and poor solvent conditions. The cooperative diffusion is a generic feature of a good solvent environment, whereas a second slow relaxation mode appears in the theta solvent regime. Its characteristics resemble self-diffusion of clusters in a gel while weak concentration fluctuations in the polymer brush decay similarly to a semidilute polymer solution.