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Effect of composition and synthetic route on the microstructure of biodegradable diblock copolymer, poly(epsilon-caprolactone-co-L-lactide)-b-poly(ethylene glycol)

Title
Effect of composition and synthetic route on the microstructure of biodegradable diblock copolymer, poly(epsilon-caprolactone-co-L-lactide)-b-poly(ethylene glycol)
Authors
Min, Y[Min, Younjin]Lee, S[Lee, Seongnam]Park, JK[Park, Jung-Ki]Cho, KY[Cho, Kuk Young]Sung, SJ[Sung, Shi-Joon]
Issue Date
2008-04
Citation
Macromolecular Research, 16(3), 231-237
Type
Article
Article Type
Article
Keywords
BiodegradableCopolymerMicrostructurePEGSequence Distribution
ISSN
1598-5032
Abstract
Biodegradable poly(ε-caprolactone-co-L-lactide)-b-poly(ethylene glycol) (PCLA-b-PEG) copolymers were synthesized via solution polymerization by varying the feed composition of ε-caprolactone (ε-CL) and L-lactide (LLA) (ε-CL:LLA=10:0, 7:3, 5:5, 3:7, 0:10). The feed ratio based on weight is in accordance with the copolymer composition except for the case of ε-CL:LLA=3:7 (C3L7), which was verified by 1H-NMR. Two different approaches were used for the exceptional case, which is an extension of the reaction time or the sequential introduction of the monomer. A copolymer composition of ε-CL:LLA=3:7 could be obtained in either case. The chemical microstructure of PCLA-b-PEG was determined using the 13C-NMR spectra and the effect of the sequential structure on the thermal properties and crystallinity were examined. Despite the same composition ratio of the copolymer, the microstructure can differ according to the reaction conditions.
URI
http://hdl.handle.net/20.500.11750/3572
DOI
10.1007/BF03218858
Publisher
Polymer Society of Korea
Files:
There are no files associated with this item.
Collection:
ETC1. Journal Articles


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