Abstract
Microwave-assisted ring-opening polymerization (MROP) of ɛ-caprolactone (ɛ-CL) in the presence of hydrogen phosphonate was investigated. Poly(ɛ-caprolactone) with molecular weight of 8100g/mol was synthesized in 100 min at 510 W microwave irradiation in the presence of 2.9% of diisopropyl hydrogen phosphonate. It was found that the MROP of ɛ-CL was first initiated by the trace water in the reaction mixture; a subsequent transesterification reaction occurred between the oligo(ɛ-caprolactone) and diisopropyl hydrogen phosphonate at the early stage of the MROP, and the resulting oligo(ɛ-caprolactone)-substituted hydrogen phosphonate could act as the catalyst during the MROP after diisopropyl hydrogen phosphonate was consumed out.
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Tan, Y., Cai, S., Liao, L. et al. Microwave-assisted Ring-Opening Polymerization of ɛ-Caprolactone in Presence of Hydrogen Phosphonates. Polym J 41, 849–854 (2009). https://doi.org/10.1295/polymj.PJ2009079
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DOI: https://doi.org/10.1295/polymj.PJ2009079
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