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 

机构地区：[1]Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education,School of Chemistry,Beihang University,Beijing 100191,China [2]School of Physics,Beihang University,Beijing 100191,China [3]International Research Institute for Multidisciplinary Science,Beihang University,Beijing 100191,China

出　　处：《Chinese Journal of Polymer Science》2021年第5期585-591,I0006,共8页高分子科学（英文版）

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).

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.

关 键 词：PBA Ionic liquid LCST THERMO-RESPONSIVE 

分 类 号：TQ317[化学工程—高聚物工业]