Tunable Lower Critical Solution Temperature of Poly(butyl acrylate)in Ionic Liquid Blends

作     者：Lie Chen Jin Huang Cong Zhao Jia-Jia Zhou Ming-Jie Liu Lie Chen;Jin Huang;Cong Zhao;Jia-Jia Zhou;Ming-Jie Liu

作者机构：Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of EducationSchool of ChemistryBeihang UniversityBeijing 100191China School of PhysicsBeihang UniversityBeijing 100191China International Research Institute for Multidisciplinary ScienceBeihang UniversityBeijing 100191China 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2021年第39卷第5期

页      面：585-591,I0006页

核心收录：

学科分类：08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：supported by the National Natural Science Funds for Distinguished Young Scholar(No.21725401) the National Key R&D Program of China(No.2017YFA0207800) the China Postdoctoral Science Foundation(No.2019M650434). 

主　　题：PBA Ionic liquid LCST Thermo-responsive 

摘      要：We describe the lower critical solution temperature(LCST)-type phase behavior of poly(butyl acrylate)(PBA)dissolved in hydrophobic 1-alkyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}amide ionic liquids(ILs).The temperature-composition phase diagrams of these PBA/ILs systems are strongly asymmetric with the critical composition shifted to low concentrations of PBA.As the molecular weight increases from 5.0×10^(3) to 2.0×10^(4),the critical temperature decreases by about 67℃,and the critical composition shifts to a lower concentration.Furthermore,the LCST of PBA/ILs system increases as increasing the alkyl side chain length in the imidazolium cation.Using IL blends as solvents,the LCST of PBA can be tuned almost linearly over a wide range by varying the mixing ratio of two ionic liquids without modifying the chemical structure of the polymers.