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Star-Shaped Poly (Γ-Caprolactone-b-Ethylene Glycol): Synthesis, Characterization and Aggregation Behavior

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Abstract:

Linear and Star-shaped PCL-b-PEG copolymers were synthesized through a two step process, including the first step to synthesize the star-shaped PCL through ring-opening polymerization of Γ-caprolactone initiated from multi-functional alcohol under the existence of tin(II) ethylhexanoate [Sn(Oct)2] catalyst, and the following step to couple the obtained star-shaped PCL with PEG segments using bi-functional linker. The structure of the polymers was confirmed by IR, NMR, GPC, et al. The aggregation behaviors of the star-shape copolymers were compared with that of the linear block copolymer with corresponding molecular weight of each arm, and the influences of structure factors were discussed.

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Advanced Biomaterials VII View Preview

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Periodical:

Key Engineering Materials (Volumes 342-343)

Pages:

725-728

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.342-343.725

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Online since:

July 2007

Authors:

Yu Jiang Fan, Jie Liang, Guo Ping Chen, Tetsuya Tateishi, Zhong Wei Gu, Xing Dong Zhang

Keywords:

Aggregation, Poly Γ-Caprolactone, Poly(ethylene glycol) (PEG), Star Shaped Block Copolymer

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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