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Synthesis and characterization of biodegradable block copolymers of ϵ-caprolactone and D,L-lactide initiated by potassium poly(ethylene glycol)ate

✍ Scribed by Xianmo Deng; Zhixue Zhu; Chengdong Xiong; Lianlai Zhang

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
138 KB
Volume
35
Category
Article
ISSN
0887-624X

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✦ Synopsis

Poly(D,L-lactide) -poly(1-caprolactone) -poly(ethylene glycol) -poly(1-caprolactone) -poly (D,L-lactide) block copolymer (PLA-PCL-PEG-PCL-PLA) was prepared by copolymerization of 1-caprolactone (1-CL) and D,L-lactide (D,L-LA) initiated by potassium poly(ethylene glycol)ate in THF at 25ЊC. The copolymers with different composition were synthesized by adjusting the mole ratio of reaction mixture. The resulted copolymers were characterized by 1 H-NMR, 13 C-NMR, IR, DSC, and GPC. Efforts to prepare copolymers with the corresponding structure of PCL-PLA-PEG-PLA-PCL and D,L-lactide/ 1-caprolactone random copolymers were not successful.

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