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  • Title: Thermoresponsive diblock copolymer with tunable soluble-insoluble and soluble-insoluble-soluble transitions.
    Author: Han X, Zhang X, Yin Q, Hu J, Liu H, Hu Y.
    Journal: Macromol Rapid Commun; 2013 Apr 12; 34(7):574-80. PubMed ID: 23440768.
    Abstract:
    The thermoresponsive transition behavior of a diblock copolymer consisting of poly(ethylene glycol) methyl ether (mPEG) and poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA) in aqueous solutions has been investigated. With a specific composition, the copolymer showed a unique tunable phase transition from no response in acidic media to a soluble-insoluble (S-I) transition in neutral media and an S-I-S transition in basic media either in the presence of salt or for salt-free solutions. The S-I-S transition can be tuned over a wide temperature range even to an S-I type transition just by adding salts. In addition, phase transitions can occur in both pure water and saline solution under practical conditions (30-80 °C), which makes them suitable for a broad range of applications.
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