Journal
COLLOID AND POLYMER SCIENCE
Volume 286, Issue 4, Pages 395-402Publisher
SPRINGER
DOI: 10.1007/s00396-007-1781-y
Keywords
poly(2-oxazoline); LCST; thermo-responsive polymer; living cationic polymerization; copolymer
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Living cationic copolymerization of 2-isopropyl-2-oxazoline with 2-n-propyl-, 2-n-butyl-, and 2-n-nonyl-2-oxazoline results in gradient copolymers of defined composition, narrow molar mass distributions (PDI=1.09-1.3), and defined overall degree of polymerization, set to n=25 for all polymers. The introduction of monomer units of stronger amphiphilic character results in a systematic decrease of the lower critical solution temperature (LCST). The LCST modulation can be controlled by the choice of the comonomer as well as the comonomer ratio and was tuned in the temperature range from 46 to 9 degrees C.
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