Please use this identifier to cite or link to this item: https://doi.org/10.1021/ma0213347
Title: Preparation and characterization of inclusion complexes of biodegradable amphiphilic poly(ethylene oxide)-poly[(R)-3-hydroxybutyrate]-poly(ethylene oxide) triblock copolymers with cyclodextrins
Authors: Li, X.
Li, J. 
Leong, K.W.
Issue Date: 25-Feb-2003
Citation: Li, X., Li, J., Leong, K.W. (2003-02-25). Preparation and characterization of inclusion complexes of biodegradable amphiphilic poly(ethylene oxide)-poly[(R)-3-hydroxybutyrate]-poly(ethylene oxide) triblock copolymers with cyclodextrins. Macromolecules 36 (4) : 1209-1214. ScholarBank@NUS Repository. https://doi.org/10.1021/ma0213347
Abstract: Inclusion complexes (ICs) of biodegradable amphiphilic poly(ethylene oxide)-poly[(R)-3-hydroxybutyrate]-poly(ethylene oxide) triblock copolymers with α-cyclodextrin (α-CD) or γ-cyclodextrin (γ-CD) were prepared from aqueous medium. The ICs were characterized by XRD, DSC, 13C CP/MAS NMR, 1H NMR, FTIR, and TGA. The results of XRD and 13C CP/MAS NMR indicated that the ICs formed channel structure, and the α-CD or γ-CD molecules in the ICs adopted a more symmetric conformation compared with their uncomplexed states. As to the triblock copolymers, while the poly(ethylene oxide) blocks were included in the channel structure, the poly[(R)-3-hydroxybutyrate] block was partially threaded by α-CD or γ-CD, which was confirmed by the results of XRD, DSC, 1H NMR, and FTIR. The formation of ICs led to an increase in the thermal stability of both cyclodextrins and the triblock copolymers.
Source Title: Macromolecules
URI: http://scholarbank.nus.edu.sg/handle/10635/88062
ISSN: 00249297
DOI: 10.1021/ma0213347
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