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Biodegradable Elastomers Enabling Thermoprocessing Below 100 °C.

Sudipta Panja1, Allison Siehr1, Anasuya Sahoo2

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Summary
This summary is machine-generated.

New biodegradable and biocompatible elastomers (PCL-PβMδVL-PCL) exhibit excellent elasticity and rapid strain recovery. These thermoplastic materials are easily processed and maintain bioactivity, showing promise for biomedical devices and tissue engineering.

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Polymer Chemistry

Background:

  • Biodegradable and biocompatible elastomers are crucial for advanced biomedical applications.
  • Existing materials often face limitations in processability, elasticity, or bioactivity retention.

Purpose of the Study:

  • To synthesize and characterize novel poly(ε-caprolactone)-co-poly(β-methyl-δ-valerolactone)-co-poly(ε-caprolactone) (PCL-PβMδVL-PCL) elastomers.
  • To evaluate their mechanical properties, processability, bioactivity retention, cytocompatibility, and degradability for biomedical potential.

Main Methods:

  • Synthesis of PCL-PβMδVL-PCL triblock copolymers.
  • Mechanical testing including strain to failure and strain recovery (ASTM standard).
  • Thermal analysis (DSC) to determine glass-transition and melting temperatures.
  • Bioactive agent (lysozyme) incorporation via melt blending and hot-pressing.
  • In vitro cytocompatibility assays and hydrolytic degradation studies.

Main Results:

  • PCL-PβMδVL-PCL elastomers demonstrated high elasticity (>1000% strain to failure) and rapid strain recovery (98.24% in 10 min).
  • Materials exhibited thermoplasticity with a low melting point (52-55 °C), enabling processing at 60 °C via printing, extrusion, or hot-pressing.
  • Lysozyme bioactivity was fully retained after melt blending and hot-pressing at 60 °C.
  • Elastomers showed excellent cytocompatibility, comparable to tissue culture polystyrene, and were degradable via hydrolysis.

Conclusions:

  • PCL-PβMδVL-PCL elastomers possess a unique combination of high elasticity, rapid recovery, thermoplastic processability, retained bioactivity, cytocompatibility, and degradability.
  • These properties make them highly promising candidates for diverse biomedical applications, including medical devices and tissue engineering scaffolds.