Effects of Isophorone Diisocyanate on the Thermal and Mechanical Properties of Shape-Memory Polyurethane Foams

Hasan, Sayyeda M.; Raymond, Jeffery E.; Wilson, Thomas S.; Keller, Brandis K.; Maitland, Duncan J.

doi:10.1002/macp.201400407

Effects of Isophorone Diisocyanate on the Thermal and Mechanical Properties of Shape-Memory Polyurethane Foams

Journal Article · Thu Oct 30 00:00:00 EDT 2014 · Macromolecular Chemistry and Physics

DOI:https://doi.org/10.1002/macp.201400407· OSTI ID:1837628

Hasan, Sayyeda M. ^[1]; Raymond, Jeffery E. ^[1]; Wilson, Thomas S. ^[2]; Keller, Brandis K. ^[1]; Maitland, Duncan J. ^[1]

Texas A & M Univ., College Station, TX (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Previously developed shape-memory polymer foams display fast actuation in water due to plasticization of the polymer network. The actuation presents itself as a depression in the glass-transition temperature when moving from dry to aqueous conditions; this effect limits the working time of the foam to 10 min when used in a transcatheter embolic device. Reproducible foams are developed by altering the chemical backbone, which can achieve working times of greater than 20 min. This is accomplished by incorporating isophorone diisocyanate into the foam, resulting in increased hydrophobicity, glass transitions, and actuation time. Furthermore, this delayed actuation, when compared with previous systems, allows for more optimal working time in clinical applications.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1837628

Report Number(s):: LLNL-JRNL--819525; 1029977

Journal Information:: Macromolecular Chemistry and Physics, Journal Name: Macromolecular Chemistry and Physics Journal Issue: 24 Vol. 215; ISSN 1022-1352

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
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