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Open AccessArticle

Studying the Ring-Opening Polymerization of 1,5-Dioxepan-2-one with Organocatalysts

Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
Authors to whom correspondence should be addressed.
Polymers 2019, 11(10), 1642;
Received: 23 September 2019 / Revised: 6 October 2019 / Accepted: 8 October 2019 / Published: 10 October 2019
(This article belongs to the Section Polymer Synthesis)
Three different organocatalysts, namely, 1-tert-butyl-4,4,4-tris(dimethylamino)-2,2-bis[tris (dimethylamino) phosphoranylidenamino]-2Λ5,4Λ5-catenadi(phosphazene) (t-BuP4), 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), have been used as 1,5-dioxepan-2-one (DXO) ring-opening polymerization (ROP) catalysts at varied reaction conditions. 1H NMR spectra, size exclusion chromatography (SEC) characterizations, and kinetic studies prove that the (co)polymerizations are proceeded in a controlled manner with the three organocatalysts. It is deduced that t-BuP4 and DBU catalysts are in an initiator/chain end activated ROP mechanism and TBD is in a nucleophilic ROP mechanism. View Full-Text
Keywords: 1,5-dioxepan-2-one; t-BuP4; DBU; TBD; organocatalyst 1,5-dioxepan-2-one; t-BuP4; DBU; TBD; organocatalyst
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MDPI and ACS Style

Xu, J.; Chen, Y.; Xiao, W.; Zhang, J.; Bu, M.; Zhang, X.; Lei, C. Studying the Ring-Opening Polymerization of 1,5-Dioxepan-2-one with Organocatalysts. Polymers 2019, 11, 1642.

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