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4280125 
Journal Article 
Quantitative omega-amination, omega-azidolysis, and omega-thiolation of poly(ethylene oxide)s through anionic mechanism 
Kim, SWoo; Siddique, AbuB; An, JinW; Park, HJ; Kim, HJun; Kang, HoJ; Lee, JaeY; Kim, S; Kim, J 
2016 
1 
Macromolecular Research
ISSN: 1598-5032 
24 
2 
188-195 
WOS:000371255900013 
n-Butyllithium-initiated ring-opening polymerization of ethylene oxide with potassium t-butoxide in the mixture of benzene and dimethyl sulfoxide (DMSO) at 35 A degrees C yielded corresponding "living" polymeric alkoxide. The molecular weight was well controlled on the basis of stoichiometric balance. Quantitative chain-end functionalizations, such as the amination, the azidation, and the thiolation of polymeric alkoxide, were performed. The yields were almost quantitative (over 98 mol%). The resulting products were characterized by the combination of H-1 NMR spectroscopy, UV/Visible spectroscopy, FTIR, MALDI-TOF MS analysis, and size exclusion chromatographic analysis. 
poly(ethylene oxide); molecular weight control; chain-end functionalizations; amination; azidation; thiolation