Diblock, Triblock and Cyclic Amphiphilic Copolymers with CO2 Switchability: Effects of Topology

Autor:	Jiang Yuting, Yujun Feng, Zheng Yi, Tong Zhang, Yixiu Han, Xin Su
Jazyk:	angličtina
Rok vydání:	2020
Předmět:	CO2 CO2 sensitivity Materials science Polymers and Plastics Ethylene oxide Atom-transfer radical-polymerization cyclic copolymer amphiphilic copolymer General Chemistry Conductivity Topology Methacrylate Article Catalysis lcsh:QD241-441 chemistry.chemical_compound lcsh:Organic chemistry chemistry Copolymer Molecule Amphiphilic copolymer
Zdroj:	Polymers Volume 12 Issue 4 Polymers, Vol 12, Iss 984, p 984 (2020)
ISSN:	2073-4360
DOI:	10.3390/polym12040984
Popis:	The combination of topology and CO2 switchability could provide new options for amphiphilic copolymers. Cyclic molecules supply novel topologies, and CO2 switching provides stimulus responsiveness. Cyclic poly(2&ndash (diethylamino)ethyl methacrylate)&ndash b&ndash poly(ethylene oxide) and their corresponding block copolymers were prepared from poly(ethylene oxide) and 2&ndash (diethylamino)ethyl methacrylate via atom transfer radical polymerization and Keck allylation with a Hoveyda&ndash Grubbs catalyst. Changes in conductivity, surface activity, and hydrodynamic size were examined to illustrate the switchability of the produced amphiphilic copolymers upon contact with CO2 in the presence of water. The reversible emulsification and switchable viscosity behaviors of the copolymers were also demonstrated.
Databáze:	OpenAIRE
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