ISSN:
1573-4838
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Medizin
,
Technik allgemein
Notizen:
Abstract PCL/PEO copolymers with different compositions were obtained from ring opening polymerization of ε-caprolactone in the presence of ethylene oxide and characterized by various analytical techniques. Data collected from DSC and X-ray diffractometry suggested that the copolymer chains possess a blocky structure, leading to both PCL and PEO-type crystalline structures. Hydrolytic degradation of these copolymers was carried out in a pH=10.6 carbonate buffer solution at 37 °C. Comparison was made with a PCL homopolymer and a PCL/PEG blend which had the same gross composition as one of the copolymers. The results showed that the presence of PEO sequences considerably enhanced the hydrophilicity of the copolymers as compared with PCL homopolymer. Nevertheless, the degradability of PCL chains was not enhanced due to the phase separation between the two components. These materials should be of great interest for biomedical uses such as matrices for sustained drug delivery because of the presence of both hydrophilic and hydrophobic microdomains. ©2000 Kluwer Academic Publishers
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1008920326988
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