scholarly journals Controlling the Actuation Rate of Low-Density Shape-Memory Polymer Foams in Water

2012 ◽  
Vol 214 (11) ◽  
pp. 1204-1214 ◽  
Author(s):  
Pooja Singhal ◽  
Anthony Boyle ◽  
Marilyn L. Brooks ◽  
Stephen Infanger ◽  
Steve Letts ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Low Density ◽  
Polymer Foams

Controlling the Physical Properties of Random Network Based Shape Memory Polymer Foams

2010 ◽  
Vol 1274 ◽  
Author(s):  
Pooja Singhal ◽  
Thomas S Wilson ◽  
Duncan J Maitland
Keyword(s):  
Shape Memory ◽  
Random Network ◽  
Shape Memory Polymer ◽  
Shape Memory Polymers ◽  
Low Density ◽  
Polymer Foams ◽  
Glass Transitions ◽  
Shape Memory Behavior ◽  
Monomer Composition ◽  
Implanted Devices

AbstractShape memory polymers (SMPs) are increasingly being considered for use in minimally invasive medical devices. For safe deployment of implanted devices it is important to be able to precisely control the actuation temperature of the device. In this study we report the effect of varying monomer composition on the glass transitions/actuation temperatures (Tg) of novel low density shape memory foams. The foams were based on hexamethylenediisocyanate (HDI), triethanolamine (TEA) and tetrakis (2-hydroxyl propyl) ethylenediamine (HPED), and were produced via a combination of chemical and physical blowing process. The process for post-foaming cleaning was also varied. Foams were characterized by DSC, DMA, and for shape memory. No clear trends were observed for foam samples without cleaning, and this was attributed to process chemicals acting as plasticizers. In foams cleaned via washing and/or sonication, the Tg was observed to decrease for compositions that were higher in the TEA content. Also, no change in shape memory behavior was observed for varying compositions. This work demonstrates the ability to tailor actuation transition temperature while maintaining shape memory behavior for low density foams suitable for aneurysm treatment.

scholarly journals Cover Feature: Multifunctional Shape-Memory Polymer Foams with Bio-inspired Antimicrobials (ChemPhysChem 16/2018)

ChemPhysChem ◽  
2018 ◽  
Vol 19 (16) ◽  
pp. 1936-1936
Author(s):  
Mary Beth Browning Monroe ◽  
Alexandra D. Easley ◽  
Katie Grant ◽  
Grace K. Fletcher ◽  
Calla Boyer ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Polymer Foams

scholarly journals Increased X-ray Visualization of Shape Memory Polymer Foams by Chemical Incorporation of Iodine Motifs

Polymers ◽  
2017 ◽  
Vol 9 (12) ◽  
pp. 381 ◽  
Author(s):  
Landon Nash ◽  
Mary Browning Monroe ◽  
Yong-Hong Ding ◽  
Kendal Ezell ◽  
Anthony Boyle ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Polymer Foams ◽  
X Ray

Development of multifunctional shape memory polymer foams

2015 ◽  
Author(s):  
Janice J. Song ◽  
Ijya Srivastava ◽  
Hani E. Naguib
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Polymer Foams

Mission BION-M1: Results of RIBES/FOAM2 experiment on shape memory polymer foams and composites

2015 ◽  
Vol 40 ◽  
pp. 109-114 ◽  
Author(s):  
Loredana Santo ◽  
Fabrizio Quadrini ◽  
Pier Luigi Ganga ◽  
Valfredo Zolesi
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Polymer Foams

Shape memory polymer foams for cerebral aneurysm reparation: Effects of plasma sterilization on physical properties and cytocompatibility

2009 ◽  
Vol 5 (5) ◽  
pp. 1508-1518 ◽  
Author(s):  
Luigi De Nardo ◽  
Rachele Alberti ◽  
Alberto Cigada ◽  
L’Hocine Yahia ◽  
Maria Cristina Tanzi ◽  
...  
Keyword(s):  
Physical Properties ◽  
Shape Memory ◽  
Cerebral Aneurysm ◽  
Shape Memory Polymer ◽  
Polymer Foams ◽  
Plasma Sterilization

Out-of-Autoclave Repair of Composite Laminates by Using Shape Memory Polymer Foams

2019 ◽  
Author(s):  
D. Bellisario ◽  
F. Quadrini ◽  
L. Santo ◽  
L. Iorio ◽  
N. Gallo ◽  
...  
Keyword(s):  
Shape Memory ◽  
Composite Laminates ◽  
Shape Recovery ◽  
Shape Memory Polymer ◽  
Production Equipment ◽  
Polymer Foams ◽  
The Poor ◽  
Compression Strain ◽  
Out Of Autoclave ◽  
The Cost

Abstract Composite repairing is an issue because of the size of the parts, the cost of the production equipment and the poor consolidation between the parent part and the repairing patches. In this study an out-of-autoclave procedure is proposed where the agglomeration pressure is provided by shape memory foams. These foams can be shaped in the desired form by means of a thermos-mechanical cycle, and provide additional pressure if constrained during recovery. Shape recovery is achieved by using the same thermal cycle which is necessary for the cure of the patches. In this study, thermoplastic shape memory foams have been characterized to evaluate the agglomeration pressure they can provide as a function of the compression strain. In order to show the feasibility of their application, the cure of a composite laminate has been performed by using pre-shaped shape memory foams. Results show that a good consolidation is achieved despite of the absence of a vacuum bag.

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