Masahiko Minoda, Tatsuya Shimizu, Sadao Miki and Jin Motoyanagi Thermoresponsive NIPAM block copolymers containing densely grafted poly(vinyl ether) brushes synthesized by a combination of living cationic polymerization and RAFT polymerization Journal of Polymer Science Part A: Polymer Chemistry 51
Diblock copolymers consisting of a multibranched polymethacrylate segment with densely grafted poly[2-(2-methoxyethoxy)ethyl vinyl ether] pendants and a poly(N-isopropylacrylamide) segment were synthesized by a combination of living cationic polymerization and RAFT polymerization. The obtained diblock copolymers possessed relatively narrow molecular weight distributions and controlled molecular weights. The aqueous solutions of the diblock copolymers exhibited two-stage thermoresponsive properties denoted by the appearance of two cloud points, upon heating, indicating that the densely grafted poly[2-(2-methoxyethoxy)ethyl vinyl ether] pendants and thepoly(N-isopropylacrylamide) segments independently responded to temperature.
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