Bioengineering functional copolymers. XI. Copper(II)-poly(N-vinyl-2-pyrrolidone-co-N-isopropylacrylamide) macrocomplexes
✍ Scribed by Zakir M. O. Rzayev; B. Kirci Denizli; Haluk Denizli
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 224 KB
- Volume
- 109
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
Abstract
A series of poly(__N‐__vinyl‐2‐pyrrolidone‐co‐__N‐__isopropylacrylamide)s, poly(VP‐co‐NIPA) copolymers with different compositions were prepared by radical copolymerization of VP and NIPA in N,N′‐dimethylformamide at 65°C using 2,2′‐azobisisobutyronitrile as initiator. Cu(II)‐copolymer macrocomplexes were prepared by complexation of the copolymers with copper sulfate in aqueous solution at 40°C. The structure and composition of the copolymers, and the formation of coordinated Cu(II)‐complexes between amide VP units and Cu^2+^ ions, were studied by FTIR spectroscopy, DSC and TGA‐DTG in addition to electrical conductivity. Studies on the relationship between composition and thermal behavior showed that the values of T~g~ and T~d~ of the copolymers and their coordinated macrocomplexes increased with increasing VP content. The copolymers predominantly show amorphous structure while their Cu(II)‐macrocomplexes show the presence of a crystalline phase. The conductive properties of the synthesized Cu(II)‐poly(VP‐co‐NIPA) complexes are also discussed. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008