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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
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Polymers 2019, 11(10), 1642; https://doi.org/10.3390/polym11101642
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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