Synthesis, characterization and degradation of ABA block copolymer of l-lactide and ε-caprolactone

Degradable ABA block copolymers were synthesized by the bulk copolymerization of PCL pre-polymers and l-lactide with stannous octanoate as the catalyst at 120°C for 120 h. The resulting copolymers were characterized by 1H NMR, 13C NMR, IR, GPC and DSC methods which confirmed the successful synthesis...

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Bibliographic Details
Published inPolymer degradation and stability Vol. 68; no. 3; pp. 423 - 429
Main Authors Qian, Haitao, Bei, Jianzhong, Wang, Shenguo
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.01.2000
Subjects
Block copolymer
Degradation
Polycaprolactone
Polylactide
Degradation
Polylactide
Polycaprolactone
Block copolymer
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Summary:Degradable ABA block copolymers were synthesized by the bulk copolymerization of PCL pre-polymers and l-lactide with stannous octanoate as the catalyst at 120°C for 120 h. The resulting copolymers were characterized by 1H NMR, 13C NMR, IR, GPC and DSC methods which confirmed the successful synthesis of block copolymers of l-lactide and ε-caprolactone. Mechanical properties showed that the introduction of poly(ε-caprolactone) made poly( l-lactide) a tough material. Hydrolytic degradation of the copolymers in a buffer of pH 7.4 at 37.0°C showed that block copolymers of different compositions degraded at different rates. Block copolymers of different properties could be obtained by adjusting the compositions of the copolymers.
ISSN:0141-3910
1873-2321
DOI:10.1016/S0141-3910(00)00031-8