Results 31 to 40 of about 29,154 (298)

Shape-memory polymers

open access: yesMaterials Today, 2007
Shape-memory polymers are an emerging class of active polymers that have dual-shape capability. They can change their shape in a predefined way from shape A to shape B when exposed to an appropriate stimulus. While shape B is given by the initial processing step, shape A is determined by applying a process called programming.
Behl, M., Lendlein, A.
openaire   +2 more sources

On modeling shape memory polymers as elastic two-phase composite materials [PDF]

open access: yes, 2012
A model has been proposed recently, which describes the experimentally observed mechanical behavior of some shape memory polymers. It considers a purely thermoelastic behavior, without strain rate effects, and assumes essentially that the polymer can be ...
GILORMINI, Pierre   +3 more
core   +1 more source

Thiol‐ene Reaction as Reversible Covalent Bond for the Design of Shape‐Memory Polymers

open access: yesMacromolecular Materials and Engineering, 2023
Besides a stable phase, shape‐memory polymers require an additional switchable moiety. In addition to thermal transitions and supramolecular interactions, these units can also be based on covalent bonds.
Farhad Shohraty   +6 more
doaj   +1 more source

Thermal-Mechanical Properties of Polyurethane-Clay Shape Memory Polymer Nanocomposites [PDF]

open access: yes, 2010
Shape memory nanocomposites of polyurethane (PU)-clay were fabricated by melt mixing of PU and nano-clay. Based on nano-indentation and microhardness tests, the strength of the nanocomposites increased dramatically as a function of clay content, which is
Kraft, Arno,   +21 more
core   +1 more source

Shape memory performance of asymmetrically reinforced epoxy/carbon fibre fabric composites in flexure [PDF]

open access: yes, 2013
In this study asymmetrically reinforced epoxy (EP)/carbon fibre (CF) fabric composites were prepared and their shape memory properties were quantified in both unconstrained and fully constrained flexural tests performed in a dynamic mechanical analyser ...
Fejős, M., J. Karger-Kocsis, M. Fejos
core   +1 more source

4D optical fibers thermally drawn from shape-memory polymers [PDF]

open access: yesEPJ Web of Conferences, 2023
Adaptative objects based on shape-memory materials are expected to significantly impact numerous technological sectors including optics and photonics.
Strutynski Clément   +6 more
doaj   +1 more source

High performance shape memory polyurethane synthesized with high molecular weight polyol as the soft segment [PDF]

open access: yes, 2012
Shape memory polyurethanes (SMPUs) are typically synthesized using polyols of low molecular weight (MW~2,000 g/mol) as it is believed that the high density of cross-links in these low molecular weight polyols are essential for high mechanical strength ...
Miraftab, Mohsen   +15 more
core   +1 more source

Predicting thermal shape recovery of crosslinked polymer networks from linear viscoelasticity [PDF]

open access: yes, 2012
The viscoelastic behavior of an amorphous shape-memory polymer network and its dependence on time and temperature were measured by dynamic mechanical analysis.
GILORMINI, Pierre   +7 more
core   +1 more source

Temperature-Induced Shape Memory Characteristics of Epoxy Resin-Based Fabric-Reinforced Composites [PDF]

open access: yes, 2013
Shape memory characteristics of woven glass and carbon fiber fabric reinforced epoxy resin-based composites were assessed in bending mode using a dynamic mechanical analyzer.
Karger-Kocsis, J.
core   +1 more source

Vitrimer-Like Shape Memory Polymers: Characterization and Applications in Reshaping and Manufacturing. [PDF]

open access: yesPolymers (Basel), 2020
The shape memory effect (SME) refers to the ability of a material to recover its original shape, but only in the presence of a right stimulus. Most polymers, either thermo-plastic or thermoset, can have the SME, although the actual shape memory ...
Wang TX   +6 more
europepmc   +2 more sources

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