期刊
POLYMER JOURNAL
卷 41, 期 10, 页码 849-854出版社
NATURE PUBLISHING GROUP
DOI: 10.1295/polymj.PJ2009079
关键词
Microwave; Ring-Opening Polymerization; Poly(epsilon-caprolactone); Phosphonate; Transesterification
资金
- National Natural Science Foundation of China [20574053, 20274032]
- Hubei Province Natural Science Foundation [2003ABA195]
Microwave-assisted ring-opening polymerization (MROP) of epsilon-caprolactone (epsilon-CL) in the presence of hydrogen phosphonate was investigated. Poly(epsilon-caprolactone) with molecular weight of 8100 g/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 epsilon-CL was first initiated by the trace water in the reaction mixture; a subsequent transesterification reaction occurred between the oligo(epsilon-caprolactone) and diisopropyl hydrogen phosphonate at the early stage of the MROP, and the resulting oligo(epsilon-caprolactone)-substituted hydrogen phosphonate could act as the catalyst during the MROP after diisopropyl hydrogen phosphonate was consumed out.
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