التفاصيل البيبلوغرافية
| العنوان: |
Controlling the Actuation Rate of Low-Density Shape-Memory Polymer Foams in Water. |
| المؤلفون: |
Singhal, Pooja1, Boyle, Anthony1, Brooks, Marilyn L.2, Infanger, Stephen1, Letts, Steve2, Small, Ward2, Maitland, Duncan J.1 djmaitland@tamu.edu, Wilson, Thomas S.2 wilson97@llnl.gov |
| المصدر: |
Macromolecular Chemistry & Physics. Jun2013, Vol. 214 Issue 11, p1204-1214. 11p. |
| مصطلحات موضوعية: |
*SHAPE memory polymers, *GLASS transition temperature, *PHASE transitions, *FOAM, *HYDROPHOBIC surfaces |
| مستخلص: |
SMPs have been shown to actuate below their dry glass transition temperatures in the presence of moisture due to plasticization. This behavior has been proposed as a self-actuating mechanism of SMPs in water/physiological media. However, control over the SMP actuation rate, a critical factor for in vivo transcatheter device delivery applications, has not been previously reported. Here, a series of polyurethane SMPs with systematically varied hydrophobicity is described that permits control of the time for their complete shape recovery in water from under 2 min to more than 24 h. This control over the SMP actuation rate can potentially provide significant improvement in their delivery under conditions, which may expose them to high-moisture environments prior to actuation. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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