Unusual phase transition mechanism of poly(ethylene oxide) in an ionic liquid: opposite frequency shifts in C–H groups

Soft Matter ◽  
2013 ◽  
Vol 9 (48) ◽  
pp. 11585 ◽  
Author(s):  
Wenlong Li ◽  
Peiyi Wu
Keyword(s):  
Phase Transition ◽  
Ionic Liquid ◽  
Ethylene Oxide ◽  
Frequency Shifts ◽  
Transition Mechanism ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

scholarly journals Thermally Reversible and Irreversible Phase Transition Behaviors in Poly(ethylene oxide)/Ionic Liquid Mixtures

2017 ◽  
Vol 38 (23) ◽  
pp. 1700401 ◽  
Author(s):  
Yunlei Chen ◽  
Yanhua Niu ◽  
Pengjian Gong ◽  
Zhilin Xiao ◽  
Guangxian Li
Keyword(s):  
Phase Transition ◽  
Ionic Liquid ◽  
Ethylene Oxide ◽  
Liquid Mixtures ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Cluster–Micelle Transition of a Thermo- and Photoresponsive ABC Triblock Copolymer in an Ionic Liquid

2019 ◽  
Vol 72 (2) ◽  
pp. 155
Author(s):  
Aya Saruwatari ◽  
Kei Hashimoto ◽  
Ryota Tamate ◽  
Ryoji Usui ◽  
Hisashi Kokubo ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Transition Temperature ◽  
Ethylene Oxide ◽  
Uv Irradiation ◽  
Low Temperatures ◽  
Triblock Copolymer ◽  
Abc Triblock Copolymer ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Azobenzene Groups

We report the photocontrollable micelle–cluster transition of an ABC-type triblock copolymer in an ionic liquid (IL). Polystyrene-b-poly(ethylene oxide)-b-poly(4-phenylazobenzyl acrylamide-r-N-isopropylacrylamide) (PSt-b-PEO-b-P(AzoBnAm-r-NIPAm)) was synthesised, where PSt is IL-phobic, PEO is IL-philic, and P(AzoBnAm-r-NIPAm) is photo- and thermoresponsive in the IL. At high temperatures, the triblock copolymer forms micelles with PSt cores; furthermore, at low temperatures, micelles self-assemble into clusters induced by the aggregation of P(AzoBnAm-r-NIPAm). Under UV irradiation, the micelles form clusters at lower temperatures than that in the dark because of the change in the solubility of P(AzoBnAm-r-NIPAm) induced by photoisomerisation of the azobenzene groups, indicating that this triblock copolymer has a photocontrollable micelle–cluster transition temperature.

Effect of halides on the solvation of poly(ethylene oxide) in the ionic liquid propylammonium nitrate

2019 ◽  
Vol 534 ◽  
pp. 649-654 ◽  
Author(s):  
Ryan Stefanovic ◽  
Zhengfei Chen ◽  
Paul A. FitzGerald ◽  
Gregory G. Warr ◽  
Rob Atkin ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ethylene Oxide ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene
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