Abstract
Radical copolymerization of N-isopropylacrylamide (NIPA) with N-vinyl-2-pyrrolidone (VP) were carried out with 2,2′-azobisisobutyronitrile (AIBN) as an intiator in N,N′-dimethylformamide solution at 65°C under nitrogen atmosphere. Compositon of the copolymers synthesized in a wide range of monomer feed ratios were determined by FTIR and 1H (13C) NMR-DEPT-135 spectroscopy. The monomer reactivity ratios were determined by Fineman-Ross, Kelen-Tüdös and non-linear regression methods. It was observed that the studied monomer pair has some tendency to alternation in the chosen monomer feed ratios due to formation of intermolecular interaction through H-bonding and N → O = C coordination. The synthesized poly(NIPA-co-VP)s show temperature sensitivity (T s), higher glass-transiton temperature (T g ), thermal stability, polyelectrolyte and stimuli-responsive (temperature- and pH-sensitive) behavior and can be attributed to the class of bioengineering functional copolymers useful for application in various gene- and bioengineering processes, drug delivery systems and biomacromolecule conjugations.
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Dincer, S., Rzaev, Z.M.O. & Piskin, E. Synthesis and Characterization of Stimuli-Responsive Poly(N-isopropylacrylamide-co-N-vinyl-2-pyrrolidone). J Polym Res 13, 121–131 (2006). https://doi.org/10.1007/s10965-005-9014-x
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DOI: https://doi.org/10.1007/s10965-005-9014-x