期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 132, 期 23, 页码 -出版社
WILEY-BLACKWELL
DOI: 10.1002/app.42054
关键词
biomaterials; foams; polyurethanes; stimuli-sensitive polymers; X-ray
资金
- National Institutes of Health/National Institute of Biomedical Imaging and Bioengineering [R01EB000462]
- National Heart Lung and Blood Institute Program of Excellence in Nanotechnology [HHSN268201000046C]
- National Science Foundation [CHE-1410272]
- Texas AM University
- Department of Biomedical Engineering
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1410272] Funding Source: National Science Foundation
Three microparticle additives, tungsten (W), zirconium oxide (ZrO2), and barium sulfate (BaSO4) were selected to enhance the radio-opacity in shape memory polymer (SMP) foam biomaterials. The addition of filler causes no significant alterations of glass transition temperatures, density of the materials increases, pore diameter decreases, and total volume recovery decreases from approximately 70 times in unfilled foams to 20 times (4% W and 10% ZrO2). The addition of W increases time to recovery; ZrO2 causes little variation in time to shape recovery; BaSO4 increases the time to recovery. On a 2.00 mean X-ray density (mean X.D.) scale, a GDC coil standard has a mean X.D. of 0.62; 4% W enhances the mean X.D. to 1.89, 10% ZrO2 to 1.39 and 4% BaSO4 to 0.74. Radio-opacity enhancing additives could be used to produce SMP foams with controlled shape memory kinetics, low density, and enhanced X-ray opacity for medical materials. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42054.
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