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- W2155300498 endingPage "760" @default.
- W2155300498 startingPage "749" @default.
- W2155300498 abstract "Poly(N-isopropylacrylamide) (PNIPAm) core cross-linked star (CCS) polymers (s-(PNIPAm)n) are synthesized by arm-first ATRP method. The related synthesis conditions are investigated and optimized. By varying cross-linker N,N-methylenebisacrylamide (BIS) concentration, PNIPAm CCS polymers with about 47, 86, and 211 arms are synthesized. Then, under ATRP condition, the “living” sites at the core of s-(PNIPAm)n reacting with a monovinyl β-cyclodextrin (β-CD) monomer afford β-CD functionalized s-(PNIPAm)n (CDF-SPNIPAm). The structures of the star polymers are characterized. The results indicate that in CDF-SPNIPAm, the ratio of β-CD units to PNIPAm arm numbers could be up to 0.6:1. The fluorescence spectra of star polymer/ANS (8-anilino-1-naphthalenesulfonic acid ammonium salt hydrate) systems prove that the β-CD moieties of CDF-SPNIPAm are available for including guest molecules. By using pH-sensitive adamantyl (Ada)-terminated poly(4-vinylpyridine) (Ada-P4VP) (synthesized by ATRP strategy) as a model guest macromolecule, the host–guest complexation between β-CD units of CDF-SPNIPAm and adamantyl groups of Ada-P4VP is confirmed via 2D NOESY 1H NMR and DLS measurements. The results indicate that the presence of the Ada-P4VP arms provides temperature-responsive star polymers with pH sensitivity. Therefore, the β-CD-functionalized star PNIPAm could provide host macromolecular platform for constructing novel miktoarm star polymers." @default.
- W2155300498 created "2016-06-24" @default.
- W2155300498 creator A5034493918 @default.
- W2155300498 creator A5077129565 @default.
- W2155300498 creator A5086726594 @default.
- W2155300498 date "2015-02-04" @default.
- W2155300498 modified "2023-10-18" @default.
- W2155300498 title "Synthesis and Characterization of PNIPAm Core Cross-Linked Star Polymers and Their Functionalization with Cyclodextrin" @default.
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- W2155300498 doi "https://doi.org/10.1002/macp.201400538" @default.
- W2155300498 hasPublicationYear "2015" @default.
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