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Shape memory polyurethane-urea foams with improved toughness.

Alexandra D Easley1, Mary Beth Browning Monroe1, Sayyeda M Hasan1

  • 1Biomedical Device Laboratory, Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843-3120.

Journal of Applied Polymer Science
|July 30, 2020
PubMed
Summary
This summary is machine-generated.

Shape memory polymer (SMP) foams offer safer aneurysm treatment. Synthesizing these foams using diethanolamine (DEA) instead of triethanolamine (TEA) improves mechanical properties, reducing micro-fractures for better medical device applications.

Keywords:
polyurethaneshape memory polymer foam

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Area of Science:

  • Biomaterials Engineering
  • Vascular Surgery
  • Polymer Science

Background:

  • Current vascular aneurysm treatments involve invasive surgery or less effective endovascular coils.
  • Endovascular coils integrated with shape memory polymer (SMP) foams show promise but face challenges with mechanical performance and homogeneity.

Purpose of the Study:

  • To enhance the mechanical properties of SMP foams for improved aneurysm treatment devices.
  • To investigate the use of diethanolamine (DEA) as a monomer in SMP synthesis as an alternative to triethanolamine (TEA).

Main Methods:

  • Synthesized SMP foams using DEA and TEA as control monomers.
  • Performed mechanical testing and micro-fracture analysis on both DEA and TEA foams.

Main Results:

  • DEA-based SMP foams exhibited superior toughness compared to TEA-based foams.
  • Reduced micro-fractures were observed in DEA foams, indicating improved structural integrity.

Conclusions:

  • Diethanolamine (DEA) is a viable monomer for synthesizing SMP foams with enhanced mechanical properties.
  • This advancement holds potential for developing safer and more effective endovascular aneurysm treatments.