Results 241 to 250 of about 73,903 (291)

Asymmetry of the Ferroelectric Phase Transition in BaTiO3

Advanced Materials, EarlyView.
Phase transitions are typically assumed to behave identically in forward and reverse. This work shows that in the ferroelectric material barium titanate this is not true: heating drives an abrupt, first‐order jump, while cooling gives a smooth, continuous change.
Asaf Hershkovitz, Elangovan Hemaprabha, Rajesh Mandal, Pravin Kavle, Jamil Tanus, Maya Barzilay, Ching‐Che Lin, David Spirito, Semën Gorfman, Bo Wang, Ignacio J. Villar‐García, Neus Domingo, Long‐Qing Chen, Lane W. Martin, Yachin Ivry   +14 more
wiley   +1 more source

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Shape-Memory Polymers

Angewandte Chemie International Edition, 2002
Material scientists predict a prominent role in the future for self-repairing and intelligent materials. Throughout the last few years, this concept has found growing interest as a result of the rise of a new class of polymers. These so-called shape-memory polymers by far surpass well-known metallic shape-memory alloys in their shape-memory properties.
Andreas, Lendlein, Steffen, Kelch
  +5 more sources

Shape Memory Polymers

2018
Shape-memory polymers (SMPs) are stimuli-sensitive materials capable of changing their shape on demand. A shape-memory function is a result of the polymer architecture together with the application of a specific programming procedure. Various possible mechanisms to induce the shape-memory effect (SME) can be realized, which can be based on thermal ...
D I Arun, P Chakravarthy, R Arockiakumar, B Santhosh   +3 more
  +6 more sources

Light-induced shape-memory polymers

Nature, 2005
Materials are said to show a shape-memory effect if they can be deformed and fixed into a temporary shape, and recover their original, permanent shape only on exposure to an external stimulus. Shape-memory polymers have received increasing attention because of their scientific and technological significance.
Andreas, Lendlein, Hongyan, Jiang, Oliver, Jünger, Robert, Langer   +3 more
openaire   +2 more sources

Enzymatically triggered shape memory polymers

Acta Biomaterialia, 2019
Cytocompatible shape memory polymers activated by thermal or photothermal triggers have been developed and established as powerful "smart material" platforms for both basic and translational research. Shape memory polymers (SMPs) that could be triggered directly by biological activity have not, in contrast, been reported.
Shelby L. Buffington, Justine E. Paul, Matthew M. Ali, Mark M. Macios, Patrick T. Mather, James H. Henderson   +5 more
openaire   +2 more sources

pH‐Induced Shape‐Memory Polymers

Macromolecular Rapid Communications, 2012
AbstractA novel pH sensitive shape‐memory polymer (SMP) is prepared by cross‐linking the β‐cyclodextrin modified alginate (β‐CD‐Alg) and diethylenetriamine modified alginate (DETA‐Alg): The pH reversible β‐CD‐DETA inclusion complexes serve as a reversible phase, and the cross‐linked alginate chains serve as a fixing phase.
Xiao-Juan, Han, Zhen-Qiang, Dong, Min-Min, Fan, Yan, Liu, Jian-Hu, li, Yi-Fu, Wang, Qi-Juan, Yuan, Bang-Jing, Li, Sheng, Zhang   +8 more
openaire   +2 more sources

Magnetic Shape Memory - Polymer Hybrids

Materials Science Forum, 2016
Martensitic Ni-Mn-Ga based alloys are known for the Magnetic Shape Memory (MSM) effect, which upon application of an external magnetic field can generate a strain up to 12 % depending on the microstructure of the martensite. The MSM effect occurs by rearrangement of the martensite variants, which is most advantageous in single crystals. Single crystals
Nilsén, Frans, Lehtonen, Joonas, Ge, Yanling, Spoljaric, Steven, Seppälä, Jukka, Hannula, Simo Pekka, Aaltio, Ilkka   +7 more
openaire   +1 more source

Reversible Bidirectional Shape‐Memory Polymers

Advanced Materials, 2013
Free-standing copolymer network samples with two types of crystallizable domains are capable of a fully reversible bidirectional shape-memory effect. One set of crystallizable domains determines the shape-shifting geometry while the other provides the thermally controlled actuation capability.
Marc, Behl, Karl, Kratz, Jörg, Zotzmann, Ulrich, Nöchel, Andreas, Lendlein   +4 more
openaire   +2 more sources

Medical applications of shape memory polymers

Biomedical Materials, 2007
Shape memory polymers (SMP) are lightweight, have a high strain/shape recovery ability, are easy to process, and required properties can be tailored for variety of applications. Recently a number of medical applications have been considered and investigated, especially for polyurethane-based SMP.
Witold, Sokolowski, Annick, Metcalfe, Shunichi, Hayashi, L'Hocine, Yahia, Jean, Raymond   +4 more
openaire   +2 more sources

Shape‐Memory Polymers: Multifunctional Shape‐Memory Polymers (Adv. Mater. 31/2010)

Advanced Materials, 2010
AbstractThe thermally‐induced shape‐memory effect (SME) is the capability of a material to change its shape in a predefined way in response to heat. In shape‐memory polymers (SMP) this shape change is the entropy‐driven recovery of a mechanical deformation, which was obtained before by application of external stress and was temporarily fixed by ...
Marc Behl, Muhammad Yasar Razzaq, Andreas Lendlein   +2 more
openaire   +1 more source