Photoinduced electron transfer-reversible addition-fragmentation chain transfer (PET-RAFT) polymerization of acrylonitrile in miniemulsion |
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Authors: | Jie-Yu He Mang Lu |
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Institution: | 1. College of Marine Science &2. Technology, Hainan Tropical Ocean University, Sanya, China;3. Department of Chemistry, Nanchang Normal University, Nanchang, China |
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Abstract: | Photoinduced electron transfer-reversible addition-fragmentation chain transfer (PET-RAFT) polymerization of acrylonitrile (AN) in miniemulsion was reported. PET-RAFT polymerization of acrylonitrile (AN) was successfully accomplished with 4-cyanopentanoic acid dithiobenzoate (CPADB) as chain transfer agent (CTA), sodium dodecyl sulfate (SDS) as emulsifier, hexadecane (HD) as co-stabilizer and TiO2 as photocatalyst at 25?°C. The linear first-order kinetic plots were observed in miniemulsion with different amounts of SDS. Excellent temporal control was demonstrated by switching between ON/OFF states multiple times, and the prepared PAN macro-CTA was used successfully to perform the chain extension experiments, indicating high retention of chain end functionality. Furthermore, the obtained PAN was amidoximated with NH2OH·HCl. The Cd2+ was extracted with amidoxime (–C(NH2)=NOH) from aqueous solutions. The maximum adsorption of 98.6% Cd2+ with 400?mg of the adsorbent was observed at pH 6.0 and an initial Cd2+concentration of 4?mmol/L. |
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Keywords: | PET-RAFT miniemulsion polymerization living radical polymerization adsorption Cd2+ |
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