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Phase separation and physical properties of PEO-containing poly(ether ester amide)s
A A Deschamps1, D W Grijpma, J Feijen
1Institute for Biomedical Technology (BMTI), Department of Polymer Chemistry and Biomaterials, Faculty of Chemical Technology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands.
Journal of Biomaterials Science. Polymer Edition
|January 31, 2003
Summary
New poly(ether ester amide) (PEEA) copolymers offer tunable mechanical properties and high water uptake. These hydrophilic materials show potential for biomedical applications due to their retained tensile strength, even when hydrated.
Area of Science:
- Polymer Chemistry
- Materials Science
- Biomedical Engineering
Background:
- Segmented copolymers offer tunable properties for advanced applications.
- Hydrophilic polymers are crucial for various biomedical uses, including tissue engineering and drug delivery.
Purpose of the Study:
- Synthesize and characterize novel poly(ether ester amide) (PEEA) copolymers.
- Investigate the structure-property relationships of PEEA copolymers with varying compositions.
- Evaluate the suitability of PEEA copolymers for biomedical applications.
Main Methods:
- Two-step polycondensation reaction for PEEA synthesis.
- Differential scanning calorimetry (DSC) for microphase separation analysis.
- Small-angle X-ray scattering (SAXS) for domain size determination.
- Mechanical testing (E-modulus, tensile strength, elongation at break) under varying hydration levels.
Main Results:
- Synthesized hydrophilic PEEA copolymers with water uptake ranging from 24-340%.
- Observed microphase separation and increased hydrophilic domain size with higher poly(ethylene glycol) (PEG) content.
- Achieved tunable mechanical properties: E-modulus (61-427 MPa), tensile strength (12-39 MPa), and elongation at break (up to 850%).
- Demonstrated that mechanical properties decrease with water uptake, but retain good tensile properties at lower PEG content.
Conclusions:
- PEEA copolymers exhibit tunable mechanical properties and significant hydrophilicity.
- The observed microphase separation and domain structure influence material performance.
- PEEA copolymers with controlled PEG content show promise for biomedical applications due to their balance of mechanical integrity and water absorption.