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Biodegradable network elastomeric polyesters from multifunctional aliphatic carboxylic acids and
Minoru Nagata1, Keisuke Kato, Wataru Sakai
1Faculty of Human Environment, Kyoto Prefectural University, Shimogamo, Sakyoku, Kyoto 606-8522, Japan. m_nagata@kpu.ac.jp
Macromolecular Bioscience
|May 6, 2006
Summary
New biodegradable elastomeric network polyesters were created using poly(epsilon-caprolactone) (PCL) diols and multifunctional acids. These materials exhibit excellent elastomeric properties and tunable enzymatic degradation rates.
Area of Science:
- Polymer Chemistry
- Materials Science
- Biomaterials Engineering
Background:
- Biodegradable polymers are crucial for sustainable materials.
- Elastomeric networks offer unique mechanical properties.
- Developing novel biodegradable elastomers with controlled degradation is essential.
Purpose of the Study:
- To synthesize and characterize novel biodegradable elastomeric network polyesters.
- To investigate the influence of poly(epsilon-caprolactone) (PCL) molecular weight and crosslinker structure on material properties.
- To evaluate the enzymatic degradation behavior of the synthesized network polyesters.
Main Methods:
- Melt polycondensation and postpolymerization to form network structures.
- Characterization using IR spectroscopy, WAXS, DSC, and tensile testing.
- Enzymatic degradation studies using Rhizopus delemar lipase.
Main Results:
- Transparent, flexible, and solvent-insoluble elastomeric network films were successfully prepared.
- Network polyesters exhibited high ultimate elongation (540-590%) and low Young's modulus (2.5-3.3 MPa).
- Enzymatic degradation rate was significantly influenced by PCL molecular weight, crosslinker type, and network morphology.
Conclusions:
- Biodegradable elastomeric network polyesters can be synthesized with tunable properties.
- The molecular weight of PCL diols and the chemical structure of crosslinkers are key factors controlling degradation.
- These materials show promise for applications requiring biodegradable and elastomeric properties.