文献类型：期刊文献

英文题名：Substrate Effect on the Phase Behavior of Polymer Brushes with Lattice Density Functional Theory

作者：Lian, Cheng[1,2];Chen, Xueqian[3];Zhao, Shuangliang[1,2];Lv, Wenjie[4];Han, Xia[1,2];Wang, Hualin[4];Liu, Honglai[1,2]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China;[3]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[4]E China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China

年份：2014

卷号：23

期号：9

起止页码：575

外文期刊名：MACROMOLECULAR THEORY AND SIMULATIONS

收录：;EI(收录号：20143600012102);WOS:【SCI-EXPANDED(收录号:WOS:000345442500005)】；

基金：This work is supported by the National Basic Research Program of China (2014CB748500), the National Natural Science Foundation of China (No. 51125032, 21306042, and 21176065), the 111 Project of Ministry of Education of China (No. B08021), the Natural Science Foundation of Shanghai (No. 13ZR1410800) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Dendrimers - Hydrogels - Swelling - Grafting (chemical) - Density functional theory

摘要：The lattice density functional theory (LDFT) is used to describe the substrate effect on the phase behavior of polymer brush grafted on different substrates. The LDFT predicts that: both attractive and repulsive interactions between the substrate and the polymer chains have effects on the thickness of brushes; when the short-range monomer-substrate interaction is larger than a certain value, the thickness and density profiles of polymer brushes almost do not change. And also an attractive substrate can increase the critical grafting density of pancake to brush transition. For temperature responsive polymer brushes, the temperature transition points are almost the same with different substrates, however, an attractive substrate can increase the swelling ratio and a repulsive substrate can decrease the swelling ratio. We also find that an increasing grafting density can decrease the substrate effect on the swelling behavior of temperature responsive polymer brushes.