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Biodegradable poly(ether-ester) multiblock copolymers for controlled release applications.

R van Dijkhuizen-Radersma1, J R Roosma, P Kaim

  • 1Chienna B.V., Prof. Bronkhorstlaan 10-D, 3723 MB Bilthoven, The Netherlands. riemke.van.dijkhuizen@chienna.com

Journal of Biomedical Materials Research. Part A
|November 19, 2003
PubMed
Summary
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New degradable poly(ether-ester)s were synthesized for controlled release. Tailoring polymer composition and poly(ethylene glycol) segment length controlled degradation and protein release kinetics.

Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Biomedical Engineering

Background:

  • Biodegradable polymers are crucial for controlled release applications.
  • Poly(ether-ester)s offer tunable properties for drug delivery.
  • Developing novel degradable polymers is essential for advanced therapeutics.

Purpose of the Study:

  • Synthesize and characterize novel multiblock poly(ether-ester)s.
  • Investigate the degradation kinetics and release properties of these copolymers.
  • Develop degradable polymers for effective controlled release of model proteins.

Main Methods:

  • Two-step melt polycondensation for polymer synthesis.
  • Characterization using NMR, DSC, and swelling tests.
  • In vitro degradation studies and model protein release assays.

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Main Results:

  • Copolymer crystallinity and swelling were tunable via PEG segment length and building unit ratios.
  • Increased succinate content enhanced swelling and degradation rates.
  • Polymers with 1000 kg/mol PEG segments exhibited more pronounced degradation.
  • Successful incorporation and release of model proteins were achieved, with release mechanisms dependent on protein size and matrix degradation.

Conclusions:

  • The synthesized poly(ether-ester)s are promising candidates for controlled release applications.
  • Degradation and release profiles can be precisely controlled by adjusting polymer architecture.
  • These materials offer a versatile platform for delivering therapeutic proteins.