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dc.contributor.authorZhao, Junpeng
dc.contributor.authorHadjichristidis, Nikolaos
dc.date.accessioned2015-08-03T12:20:51Z
dc.date.available2015-08-03T12:20:51Z
dc.date.issued2015-02-04
dc.identifier.issn17599954
dc.identifier.doi10.1039/c5py00019j
dc.identifier.urihttp://hdl.handle.net/10754/563958
dc.description.abstractOrganocatalytic ring-opening polymerization (ROP) reactions of three renewable 5-alkyl δ-lactones, namely δ-hexalactone (HL), δ-nonalactone (NL) and δ-decalactone (DL), using diphenyl phosphate (DPP) were investigated. Room temperature, together with a relatively high monomer concentration (≥3 M), was demonstrated to be suitable for achieving a living ROP behavior, a high conversion of the lactone, a controlled molecular weight and a low dispersity of the polyester. HL, containing a 5-methyl substituent, showed a much higher reactivity (polymerization rate) and a slightly higher equilibrium conversion than the compounds with longer alkyl substituents (NL and DL). The effectiveness of DPP-catalyzed ROP of 5-alkyl δ-lactones facilitated the one-pot performance following the t-BuP4-promoted ROP of monosubstituted epoxides. It has been shown in an earlier study that substituted polyethers acted as "slow initiators" for non-substituted lactones. However, efficient initiations were observed in the present study as substituted lactones were polymerized from the substituted polyethers. Therefore, this reinforces the previously developed "catalyst switch" strategy, making it a more versatile tool for the synthesis of well-defined polyether-polyester block copolymers from a large variety of epoxide and lactone monomers. © The Royal Society of Chemistry 2015.
dc.publisherRoyal Society of Chemistry (RSC)
dc.rightsThis article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
dc.titlePolymerization of 5-alkyl δ-lactones catalyzed by diphenyl phosphate and their sequential organocatalytic polymerization with monosubstituted epoxides
dc.typeArticle
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.contributor.departmentPolymer Synthesis Laboratory
dc.contributor.departmentChemical Science Program
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.identifier.journalPolym. Chem.
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionFaculty of Materials Science and Engineering, South China University of TechnologyGuangzhou, China
kaust.personHadjichristidis, Nikolaos
refterms.dateFOA2018-06-13T18:17:02Z


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