Melt spun thermoresponsive shape memory fibers based on polyurethanes: Effect of drawing and heat-setting on fiber morphology and properties

2006 ◽  
Vol 103 (4) ◽  
pp. 2172-2182 ◽  
Author(s):  
Jasmeet Kaursoin ◽  
Ashwini K. Agrawal
Keyword(s):  
Shape Memory ◽  
Fiber Morphology ◽  
Heat Setting ◽  
Melt Spun ◽  
Shape Memory Fibers

scholarly journals Thermoresponsive Shape Memory Fibers for Compression Garments

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2989
Author(s):  
Robert Tonndorf ◽  
Dilbar Aibibu ◽  
Chokri Cherif
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Thermoplastic Polyurethane ◽  
Shape Memory Polymers ◽  
Strain Recovery ◽  
Recovery Stress ◽  
Compression Garments ◽  
Melt Spun ◽  
Shape Memory Fibers

Their highly deformable properties make shape memory polymers (SMP) a promising component for the development of new compression garments. The shape memory effect (SME) can be observed when two polymers are combined. In here, polycaprolactone (PCL) and thermoplastic polyurethane (TPU) were melt spun in different arrangement types (blend, core-sheath, and island-in-sea), whereas the best SME was observed for the blend type. In order to trigger the SME, this yarn was stimulated at a temperature of 50 °C. It showed a strain fixation of 62%, a strain recovery of 99%, and a recovery stress of 2.7 MPa.

Structural and Magnetic Properties of Melt-Spun Ni-Mn(Fe)-Ga Ferromagnetic Shape Memory Ribbons

2014 ◽  
Vol 50 (4) ◽  
pp. 1-3 ◽  
Author(s):  
Vladimir V. Khovaylo ◽  
Viktor V. Koledov ◽  
Dmitry I. Kuchin ◽  
Vladimir G. Shavrov ◽  
Natalia N. Resnina ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Shape Memory ◽  
Melt Spun ◽  
Structural And Magnetic Properties ◽  
Ferromagnetic Shape Memory

scholarly journals Transformation Properties of Fe70-Pd30-XInX Shape Memory Melt-spun Ribbons

2015 ◽  
Vol 2 ◽  
pp. S845-S848
Author(s):  
D. Vokoun ◽  
C.T. Hu ◽  
Y.H. Lo ◽  
A. Lančok ◽  
O. Heczko
Keyword(s):  
Shape Memory ◽  
Melt Spun ◽  
Melt Spun Ribbons

Electrospinning of cationically polymerized epoxy/polycaprolactone blends to obtain shape memory fibers (SMF)

2017 ◽  
Vol 94 ◽  
pp. 376-383 ◽  
Author(s):  
Alvaro Iregui ◽  
Lourdes Irusta ◽  
Oihane Llorente ◽  
Loli Martin ◽  
Tamara Calvo-Correas ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Fibers

Mechanics of nickel–titanium shape memory alloys undergoing partially constrained recovery for self-healing materials

2018 ◽  
Vol 29 (15) ◽  
pp. 3025-3036 ◽  
Author(s):  
Nathan Salowitz ◽  
Ameralys Correa ◽  
Trishika Santebennur ◽  
Afsaneh Dorri Moghadam ◽  
Xiaojun Yan ◽  
...  
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Nickel Titanium ◽  
Self Healing ◽  
Bonding Agents ◽  
Compressive Loads ◽  
Martensitic State ◽  
Geometric Changes ◽  
Shape Memory Fibers

Engineered self-healing materials seek to create an innate ability for materials to restore mechanical strength after incurring damage, much like biological organisms. This technology will enable the design of structures that can withstand their everyday use without damage but also recover from damage due to an overload incident. One of the primary mechanisms for self-healing is the incorporation of shape memory fibers in a composite type structure. Upon activation, these shape memory fibers can restore geometric changes caused by damage and close fractures. To date, shape memory–based self-healing, without bonding agents, has been limited to geometric restoration without creating a capability to withstand externally applied tensile loads due to the way the shape memory material has been integrated into the composite. Some form of bonding has been necessary for self-healing materials to resist an externally applied load after healing. This article presents results of new study into using a form of constrained recovery of nickel–titanium shape memory alloys in self-healing materials to create residual compressive loads across fractures in the low temperature martensitic state. Analysis is presented relating internal loads in self-healing materials, potentially generated by shape memory alloys, to the capability to resist externally applied loads. Supporting properties were experimentally characterized in nickel–titanium shape memory alloy wires. Finally, self-healing samples were synthesized and tested demonstrating the ability to resist externally applies loads without bonding. This study provides a new useful characterization of nickel–titanium applicable to self-healing structures and opens the door to new forms of healing like incorporation of pressure-based bonding.

Mechanical and functional properties of quarternary (Ti, Hf) (Ni, Cu)-based shape memory melt-spun ribbons

2003 ◽  
Vol 112 ◽  
pp. 889-892 ◽  
Author(s):  
A. Sezonenko ◽  
V. Kolomytsev ◽  
M. Babanly ◽  
A. Pasko ◽  
P. Ochin ◽  
...  
Keyword(s):  
Shape Memory ◽  
Functional Properties ◽  
Melt Spun ◽  
Melt Spun Ribbons
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