Synthesis, characterization and biodegradation of functionalized amino acid-based poly(ester amide)s

Area of Science:

• Polymer Chemistry
• Biomaterials Science
• Organic Synthesis

Background:

• Biodegradable polymers are crucial for biomedical applications.
• Amino acid-based polymers offer biocompatibility and tunable properties.
• Functional groups enable further modification and conjugation.

Purpose of the Study:

• To design and synthesize novel biodegradable amino acid-based poly(ester amide)s (PEA-AGs).
• To investigate the effect of chemical structure on thermal and biodegradation properties.
• To demonstrate the utility of pendant functional groups for further derivatization.

Main Methods:

• Solution co-polycondensation of amino acid and dicarboxylic acid monomers.
• Incorporation of DL-2-allylglycine to introduce pendant double bonds.
• Characterization using FTIR and NMR spectroscopy.
• Thermal analysis (glass-transition temperature).
• In vitro biodegradation studies in enzyme solution and PBS buffer.

Main Results:

• Successfully synthesized a series of PEA-AGs with adjustable double bond content.
• Polymer glass-transition temperature decreased with increased methylene chain length.
• PEA-AGs showed significantly faster biodegradation in enzyme solutions compared to PBS.
• Demonstrated the synthesis of functional PEA derivatives utilizing pendant double bonds.

Conclusions:

• The synthesized PEA-AGs are biodegradable and possess tunable properties.
• Pendant functional groups enhance the versatility of PEA-AGs for biomedical applications.
• These polymers show promise for drug delivery and tissue engineering through conjugation and derivatization.