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- W2375153606 abstract "The emulsion polymerization of styrene(St) was firstly carried out by initiating of H_2O_2-Fe~(2+) redox initiation system.PSt-OH was obtained with hydroxyl group as end group in polystyrene.Subsequently,the macromolecules PSt-OH were solubilizated in the micellar solution of sodium dodecylsulfate(SDS),and the block polymerization of N-vinylpyrrolidone(NVP) in the aqueous solution at the end group of PSt-OH was initiated by cerium ammonium sulfate,resulting in the amphiphilic block copolymer PSt-b-PVP.Several means were adopted to characterize the chemical composition and structure of PSt-b-PVP,such as FT-IR,~1H-NMR,GPC and DSC.Results show that by the oxidation action of cerium(Ⅳ) salt,free radicals can be produced at the sites of the hydroxyl groups of PSt-OH,which are solubilized in the micellar solution of SDS,and the block copolymerization of NVP can be favorably realized.With the(increasing) of copolymerization time,the content of PVP block is increased." @default.
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- W2375153606 date "2010-01-01" @default.
- W2375153606 modified "2023-09-24" @default.
- W2375153606 title "Preparation and Characterization of Amphiphilic Block Copolymer PSt-b-PVP by Initiation of Cerium Salt in Micellar Solution" @default.
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