A new type of biodegradable polymer material, poly(caprolactone)–poly(ethylene glycol) block copolymer (PCL‐b‐PEG), was synthesized by means of direct copolycondensation of ε‐caprolactone with poly(ethylene glycol) in the presence of a Ti(OBu) 4 catalyst. The degradability of the polycaprolactone was improved by introducing a PEG component into it. The degradation of PCL‐b‐PEG copolymer increase with a decreasing crystallinity of the copolymer, and can be controlled by adjusting the component ratio of the copolymer.
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Bo Qiu (1993) studied this question.
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