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Synthesis and Characterization of Tunable Dual‐pH Switchable Zwitterionic Copolymers
Author(s) -
Guo Jian,
Li Zifu,
Li Yunhui,
Liu Qingxia,
Yan Ci,
Xu Zhenghe
Publication year - 2016
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201600082
Subject(s) - copolymer , cationic polymerization , polymer chemistry , methacrylate , aqueous solution , chemistry , quartz crystal microbalance , acrylamide , acrylic acid , polymer , organic chemistry , adsorption
A dual‐pH switchable zwitterionic copolymer, poly(2‐(dimethylamino)ethyl methacrylate‐co‐acrylamide‐co‐acrylic acid) (poly(DMAEMA‐co‐AM‐co‐AA)), is synthesized by random copolymerization. Characterized by a sharp change in solution turbidity, the conformation of such polymers in aqueous solutions can be switched at both acidic (low pH) and alkaline (high pH) conditions, with the switching pH being finely tunable by controlling the molar ratio of cationic and anionic functional groups of the copolymer. Study with quartz crystal microbalance with dissipation confirm the origin of the conformational change from electrostatic attractions between cationic DMAEMA and anionic AA functional groups.