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中文摘要：
当长链高分子高密度接枝到一个表面上时，由于分子链间的相互作用使得接枝的高分子链扩张而形成伸直链的构象，这种形态被称为高分子刷。高分子刷在润湿，粘结，胶体稳定等方面有广泛的用途。de Gennes首先通过标度研究了接枝到平面上的高分子链的链构象。随后，一些研究通过自恰场理论对高分子刷的构象进行了更为深入的讨论口引。虽然对于高分子刷在溶液中的构象的研究在理论和计算机模拟上取得了很大的进展，
英文摘要：
The well defined core-shell polymer brush with poly （N-isopropylacrylamide） as shell was investigated by dynamic laser light scattering. Compared with the isolated three-dimensional chain, the grafted PNIPAM chains have a broader range in thickness change with a decrease in solvent quality due to the interchain interaction in spherical geometry. With the increasing of the molecule weight of the PNIPAM ,the phase transition of grafted chain change from single transition to two stage transition. At T = 250C,the 〈 L 〉 shell can be scale to N as 〈 L 〉 shell ∝ N^0. 9±0.1. With increasing of the temperature, the exponential of scaling law of 〈 L 〉 shell and N decrease a little. However,the PNIPAM chains still expand with 〈 L 〉 shell ∝ N^0.76±0.10 due to the high grafted chain density.
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