1. Synthesis and Characterization of Star-Shaped Diblock Poly(ɛ-caprolactone)/Poly(ethylene oxide) Copolymers
- Author
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Margherita Nuzzo, Rosario Palumbo, Giovanni Maglio, and Giuseppe Nese
- Subjects
Materials science ,Polymers and Plastics ,Ethylene oxide ,Organic Chemistry ,Ring-opening polymerization ,Pentaerythritol ,End-group ,chemistry.chemical_compound ,Differential scanning calorimetry ,Polymerization ,chemistry ,Polymer chemistry ,Materials Chemistry ,Copolymer ,Caprolactone - Abstract
Star-shaped hydroxy-terminated poly(e-caprolactone)s (ssPCL), with arms of different lengths, were obtained by ring-opening polymerization (ROP) of e-caprolactone initiated by pentaerythritol, and were condensed with α-methyl-ω-(3-carboxypropionyloxy)-poly(ethylene oxide)s (M n = 550-5000) to afford four-armed PCL-PEO star diblock copolymers (ssPCl-PEO). The polymers were characterized by 1 H and 13 C NMR spectroscopy and sizeexclusion chromatography (SEC). The melting behavior of ssPCLs was studied by differential scanning calorimetry DSC). X-ray diffraction and DSC techniques were used to investigate the crystalline phases of ssPCL-PEOs.
- Published
- 2004
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