Ring-Opening Polymerization of ε-Caprolactone by Poly(ethylene glycol) by an Activated Monomer Mechanism

The polymerization of ε‐caprolactone (CL) in the presence of HCl · Et2O by an activated monomer mechanism was performed to synthesize diblock or triblock copolymers composed of poly(ethylene glycol) (PEG) and poly(ε‐caprolactone) (PCL). The obtained PCLs had molecular weights close to the theoretica...

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Bibliographic Details
Published in:Macromolecular rapid communications. 2005-04, Vol.26 (8), p.643-648
Main Authors: Kim, Moon Suk, Seo, Kwang Su, Khang, Gilson, Lee, Hai Bang
Format: Article
Language:English
Subjects:
activated monomer mechanism
block copolymers
poly(ethylene glycol)
poly(ε-caprolactone)
ring-opening polymerization
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Summary:The polymerization of ε‐caprolactone (CL) in the presence of HCl · Et2O by an activated monomer mechanism was performed to synthesize diblock or triblock copolymers composed of poly(ethylene glycol) (PEG) and poly(ε‐caprolactone) (PCL). The obtained PCLs had molecular weights close to the theoretical values calculated from the CL to PEG molar ratios and exibited monomodal GPC curves. We successfully prepared PEG and PCL block copolymers by a metal‐free method. The non‐metal catalyzed living ring‐opening polymerisation of ε‐caprolactone by PEG.
ISSN:1022-1336
1521-3927
DOI:10.1002/marc.200400650