scholarly journals Examination of radio-opacity enhancing additives in shape memory polyurethane foams

2015 ◽  
Vol 132 (23) ◽  
pp. n/a-n/a ◽  
Author(s):  
Andrew C. Weems ◽  
Jeffery E. Raymond ◽  
Kevin T. Wacker ◽  
Tiffany P. Gustafson ◽  
Brandis Keller ◽  
...  
Keyword(s):  
Shape Memory ◽  
Polyurethane Foams ◽  
Shape Memory Polyurethane

scholarly journals Ultra low density and highly crosslinked biocompatible shape memory polyurethane foams

2012 ◽  
Vol 50 (10) ◽  
pp. 724-737 ◽  
Author(s):  
Pooja Singhal ◽  
Jennifer N. Rodriguez ◽  
Ward Small ◽  
Scott Eagleston ◽  
Judy Van de Water ◽  
...  
Keyword(s):  
Shape Memory ◽  
Polyurethane Foams ◽  
Low Density ◽  
Shape Memory Polyurethane

Chemico-physical modifications induced by plasma and ozone sterilizations on shape memory polyurethane foams

2010 ◽  
Vol 21 (7) ◽  
pp. 2067-2078 ◽  
Author(s):  
Luigi De Nardo ◽  
Monica Moscatelli ◽  
Federica Silvi ◽  
Maria Cristina Tanzi ◽  
L’Hocine Yahia ◽  
...  
Keyword(s):  
Shape Memory ◽  
Polyurethane Foams ◽  
Shape Memory Polyurethane

scholarly journals Finite element modeling of shape memory polyurethane foams for treatment of cerebral aneurysms

2021 ◽  
Author(s):  
H. R. Jarrah ◽  
A. Zolfagharian ◽  
M. Bodaghi
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Shape Memory ◽  
Cerebral Aneurysms ◽  
Element Model ◽  
Polyurethane Foams ◽  
Patient Specific ◽  
Structural Cell ◽  
Element Modeling ◽  
Shape Memory Polyurethane

AbstractIn this paper, a thermo-mechanical analysis of shape memory polyurethane foams (SMPUFs) with aiding of a finite element model (FEM) for treating cerebral aneurysms (CAs) is introduced. Since the deformation of foam cells is extremely difficult to observe experimentally due to their small size, a structural cell-assembly model is established in this work via finite element modeling to examine all-level deformation details. Representative volume elements of random equilateral Kelvin open-cell microstructures are adopted for the cell foam. Also, a user-defined material subroutine (UMAT) is developed based on a thermo-visco-elastic constitutive model for SMPUFs, and implemented in the ABAQUS software package. The model is able to capture thermo-mechanical responses of SMPUFs for a full shape memory thermodynamic cycle. One of the latest treatments of CAs is filling the inside of aneurysms with SMPUFs. The developed FEM is conducted on patient-specific basilar aneurysms treated by SMPUFs. Three sizes of foams are selected for the filling inside of the aneurysm and then governing boundary conditions and loadings are applied to the foams. The results of the distribution of stress and displacement in the absence and presence of the foam are compared. Due to the absence of similar results in the specialized literature, this paper is likely to fill a gap in the state of the art of this problem and provide pertinent results that are instrumental in the design of SMPUFs for treating CAs.

scholarly journals Low density biodegradable shape memory polyurethane foams for embolic biomedical applications

2014 ◽  
Vol 10 (1) ◽  
pp. 67-76 ◽  
Author(s):  
Pooja Singhal ◽  
Ward Small ◽  
Elizabeth Cosgriff-Hernandez ◽  
Duncan J. Maitland ◽  
Thomas S. Wilson
Keyword(s):  
Shape Memory ◽  
Biomedical Applications ◽  
Polyurethane Foams ◽  
Low Density ◽  
Shape Memory Polyurethane

Carbon Nanotubes Embedded Shape Memory Polyurethane Foams

2019 ◽  
Vol 27 (9) ◽  
pp. 919-925 ◽  
Author(s):  
Hyung Min Kim ◽  
Juhyuk Park ◽  
Zheng Min Huang ◽  
Jae Ryoun Youn ◽  
Young Seok Song
Keyword(s):  
Carbon Nanotubes ◽  
Shape Memory ◽  
Polyurethane Foams ◽  
Shape Memory Polyurethane

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

2014 ◽  
Vol 215 (24) ◽  
pp. 2420-2429 ◽  
Author(s):  
Sayyeda M. Hasan ◽  
Jeffery E. Raymond ◽  
Thomas S. Wilson ◽  
Brandis K. Keller ◽  
Duncan J. Maitland
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Polyurethane Foams ◽  
Thermal And Mechanical Properties ◽  
Isophorone Diisocyanate ◽  
Shape Memory Polyurethane

scholarly journals Shape memory polyurethane foams

2012 ◽  
Vol 6 (1) ◽  
pp. 63-69 ◽  
Author(s):  
S. M. Kang ◽  
S. J. Lee ◽  
B. K. Kim
Keyword(s):  
Shape Memory ◽  
Polyurethane Foams ◽  
Shape Memory Polyurethane

Three-dimensional Graphene Coated Shape Memory Polyurethane Foam with Fast Responsive Performance

2021 ◽  
Author(s):  
Tianjiao Wang ◽  
Jun Zhao ◽  
Chuanxin Weng ◽  
Tong Wang ◽  
Yayun Liu ◽  
...  
Keyword(s):  
Shape Memory ◽  
Polyurethane Foam ◽  
Three Dimensional ◽  
Shape Memory Polymers ◽  
Practical Applications ◽  
External Stimuli ◽  
Shape Memory Polyurethane

Shape memory polymers (SMPs) that change shapes as designed by external stimuli have become one of the most promising materials as actuators, sensors, and deployable devices. However, their practical applications...

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