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dc.contributor.authorZhao, Junpeng
dc.contributor.authorPahovnik, David
dc.contributor.authorGnanou, Yves
dc.contributor.authorHadjichristidis, Nikolaos
dc.date.accessioned2015-08-03T11:51:30Z
dc.date.available2015-08-03T11:51:30Z
dc.date.issued2014-03-11
dc.identifier.issn00249297
dc.identifier.doi10.1021/ma500067j
dc.identifier.urihttp://hdl.handle.net/10754/563439
dc.description.abstractThe effectiveness of carboxylic acid as initiator for the anionic ring-opening polymerization of ethylene oxide was investigated with a strong phosphazene base (t-BuP4) used as promoter. Kinetic study showed an induction period, i.e., transformation of carboxylic acid to hydroxyl ester, followed by slow chain growth together with simultaneous and fast end-group transesterification, which led to poly(ethylene oxide) (PEO) consisting of monoester (monohydroxyl), diester, and dihydroxyl species. An appropriate t-BuP4/acid ratio was proven to be essential to achieve better control over the polymerization and low dispersity of PEO. This work provides important information and enriches the toolbox for macromolecular and biomolecular engineering with protic initiating sites. © 2014 American Chemical Society.
dc.publisherAmerican Chemical Society (ACS)
dc.titlePhosphazene-promoted metal-free ring-opening polymerization of ethylene oxide initiated by carboxylic acid
dc.typeArticle
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.contributor.departmentPolymer Synthesis Laboratory
dc.contributor.departmentChemical Science Program
dc.identifier.journalMacromolecules
kaust.personGnanou, Yves


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