Anionic and ionic coordinative polymerization of ϵ‐caprolactone | Zendy

Stere Cristina | Zendy; Iovu MihaelaCorina | Zendy; Iovu Horia | Zendy; Boborodea Adrian | Zendy; Vasilescu Dan Sorin | Zendy; Read Simon James | Zendy

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Anionic and ionic coordinative polymerization of ϵ‐caprolactone

Author(s) -

Stere Cristina,

Iovu MihaelaCorina,

Iovu Horia,

Boborodea Adrian,

Vasilescu Dan Sorin,

Read Simon James

Publication year - 2001

Publication title -

polymers for advanced technologies

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.61

H-Index - 90

eISSN - 1099-1581

pISSN - 1042-7147

DOI - 10.1002/pat.68

Subject(s) - polymerization , polymer chemistry , caprolactone , crown ether , ether , ionic polymerization , materials science , chain transfer , polyester , potassium , carbazole , polymer , chemistry , organic chemistry , radical polymerization , ion

The polymerization of ϵ‐caprolactone initiated by two catalyst systems was studied: (1) carbazole‐potassium in the presence of 18‐crown‐6 ether and (2) NdCl 3 / TBP / TIBA (neodymiumtrichloride/tri‐n‐butyl‐phosphate/triisobutylaluminium) at the molar ratio 1/3/1. For both initiator systems conversion/time plots were determined and the polymers were characterized by IR, GPC and by 1 H ‐ and 13 C − NMR spectroscopy. Polyesters with the highest molecular weight ( M n ≅44 000 g/mol) were obtained for the polymerizations initiated by the carbazole‐potassium/18‐crown‐6 ether system. The features of the polymerization initiated by the carbazole‐potassium/18‐crown‐6 ether system are discussed on the basis of a simple scheme. The nature of this polymerization is non‐living. Copyright © 2000 John Wiley & Sons, Ltd.

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