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Synthesis and Characterization of Star-Shaped Diblock Poly(ε-caprolactone)/Poly(ethylene oxide) Copolymers

✍ Scribed by Giovanni Maglio; Giuseppe Nese; Margherita Nuzzo; Rosario Palumbo

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
129 KB
Volume
25
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Summary: Star‐shaped hydroxy‐terminated poly(ε‐caprolactone)s (__ss__PCL), with arms of different lengths, were obtained by ring‐opening polymerization (ROP) of ε‐caprolactone initiated by pentaerythritol, and were condensed with α‐methyl‐ω‐(3‐carboxypropionyloxy)‐poly(ethylene oxide)s ($\overline M _{\rm n}$ = 550–5 000) to afford four‐armed PCL‐PEO star diblock copolymers (__ss__PCL‐PEO). The polymers were characterized by ^1^H and ^13^C NMR spectroscopy and size‐exclusion chromatography (SEC). The melting behavior of __ss__PCLs was studied by differential scanning calorimetry (DSC). X‐ray diffraction and DSC techniques were used to investigate the crystalline phases of __ss__PCL‐PEOs.

The part of the synthesis of four‐armed star‐shaped diblock poly(ε‐caprolactone)‐poly(ethylene oxide) copolymers as described.

imageThe part of the synthesis of four‐armed star‐shaped diblock poly(ε‐caprolactone)‐poly(ethylene oxide) copolymers as described.

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