Homogeneous and Heterogeneous Polymerization ofɛ-Caprolactone by Neodymium Alkoxides Prepared In Situ

Tortosa, Karine; Hamaide, Thierry; Boisson, Christophe; Spitz, Roger

doi:10.1002/1521-3935(20010401)202:7<1156::aid-macp1156>3.0.co;2-9

Cited by 40 publications

References 9 publications

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Ring Opening Polymerization

Lecomte

Jérôme

2004

Encyclopedia of Polymer Science and Technology

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Biodegradable and biocompatible aliphatic polyesters have a great potential as biomaterials and environmentally friendly thermoplastics. An intensive research effort has been devoted to living or at least controlled ring opening polymerization (ROP) of lactones, lactides, and glycolides that contributes enormously to macromolecular engineering of these aliphatic polyesters. The recent progress in the field has been reviewed and discussed in terms of structure/nature of the polymerization promoters. A first section focuses on organometallic initiators and catalysts, with emphasis on the more efficient aluminum, tin, and yttrium alkoxides. Special attention is also paid to the steroselective ROP of D , L ‐ and meso ‐lactide into polylactide of controlled tacticity. Contamination of the final polyesters by metallic residues is a drawback, which is now tackled by grafting metal alkoxides onto solid supports. The second section is dedicated to ROP mediated by enzymes, which is a very attractive strategy. Finally, “all organic” processes have been recently worked out, which are very promising for the synthesis of aliphatic polyesters free from any metallic contaminants.

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Ring Opening Polymerization

Lecomte

Jérôme

2004

Encyclopedia of Polymer Science and Technology

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Surface Organolanthanide and ‐Actinide Chemistry

Roux¹,

Anwander²

2009

Modern Surface Organometallic Chemistry

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Ring‐opening polymerization of ε‐caprolactone with a divalent samarium bis(phosphido) complex

Jiang

Lou

Sun

et al. 2005

J of Applied Polymer Sci

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ABSTRACT:The ring-opening polymerization of -caprolactone initiated with a divalent samarium bis(phosphido) complex [Sm(PPh 2 ) 2 ] is reported. The polymerization proceeded under mild reaction conditions and resulted in polyesters with number-average molecular weights of 8.2 ϫ 10 3 to 12.5 ϫ 10 3 . The yield and molecular weight of poly(-caprolactone)s were dependent on the experimental parameters, such as the monomer/initiator molar ratio, the monomer concentration, the reaction temperature, and the polymerization time. The obtained polymers were characterized with Fourier transform infrared, NMR, gel permeation chromatography, and differential scanning calorimetry. On the basis of an end-group analysis of low-molecular-weight polymers by NMR spectroscopy, a coordination-insertion mechanism is proposed for the polymerization.

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Homogeneous and Heterogeneous Polymerization ofɛ-Caprolactone by Neodymium Alkoxides Prepared In Situ

Cited by 40 publications

References 9 publications

Ring Opening Polymerization

Ring Opening Polymerization

Surface Organolanthanide and ‐Actinide Chemistry

Ring‐opening polymerization of ε‐caprolactone with a divalent samarium bis(phosphido) complex

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