Results 261 to 270 of about 277,839 (301)

Polydomains in liquid‐crystal elastomers

Macromolecular Theory and Simulations, 1994
AbstractIn liquid‐crystal elastomers, the simultaneous presence of rubber elasticity due to the crosslinked backbone chains and of optical birefringence due to the mesogens in the side chains lead to exceptional physical properties. An elastic deformation of the network influences the order of the mesogens and, therefore, the optical properties.
Alexandra ten Bosch, Lionel Varichon
openaire   +1 more source

Cephalopod-Inspired MXene-Integrated Mechanochromic Cholesteric Liquid Crystal Elastomers for Visible-Infrared-Radar Multispectral Camouflage.

Angewandte Chemie
Multispectral camouflage materials play a vital role in sophisticated multi-band electromagnetic (EM) applications. However, conventional single-band stealth is difficult to align with the growing demand for multi-band compatibility and intelligent ...
Ling Wang, Yuan Liu, Ran Bi, Xuan Zhang, Yuanhao Chen, Cristian Valenzuela, Yanzhao Yang, Huan Liu, Le Yang, Wei Feng   +9 more
semanticscholar   +1 more source

Voxelated liquid crystal elastomers

Science, 2015
Making small actuators more effective Liquid-crystal molecules orient locally in response to external fields. When long-chain liquid-crystalline molecules are crosslinked together, changes in local orientation can lead to significant volume changes. Ware et al. made efficient microactuators that can change
Taylor H. Ware, Michael E. McConney, Jeong Jae Wie, Vincent P. Tondiglia, Timothy J. White   +4 more
openaire   +1 more source

Mechanochromic Palettes of Cholesteric Liquid Crystal Elastomers for Visual Signaling

Advanced Optical Materials
Mechanochromic photonic materials present promising prospects for enhancing diverse facets of human life. Cholesteric liquid crystal elastomers (CLCEs) present immediate mechanochromic properties, allowing their utility in various fields, including ...
Hyewon Park, H. Lee, Hyungju Ahn, W. Han, H. Yun, Yun‐Seok Choi, Dae Seok Kim, D. Yoon   +7 more
semanticscholar   +1 more source

Liquid Crystal Elastomer Balloons

Macromolecules, 2001
We describe a setup for mechanical measurements of smectic liquid crystal elastomers and study two materials with different network topologies. The elastic response of macroscopically oriented smectic elastomers to a two-dimensionally isotropic stress in the film plane is measured.
Heidrun Schüring, Ralf Stannarius, Christian Tolksdorf, Rudolf Zentel   +3 more
openaire   +1 more source

Instability of liquid crystal elastomers

Smart Materials and Structures, 2015
Nematic liquid crystal elastomers (LCEs) contract in the director direction but expand in other directions, perpendicular to the director, when heated. If the expansion of an LCE is constrained, compressive stress builds up in the LCE, and it wrinkles or buckles to release the stored elastic energy.
Ning An, Meie Li, Jinxiong Zhou
openaire   +1 more source

Light-Responsive Actuator of Azobenzene-Containing Main-Chain Liquid Crystal Elastomers with Allyl Sulfide Dynamic Exchangeable Linkages.

ACS Applied Materials and Interfaces
Herein, a light-responsive and light-induced bond-exchange-reaction (BER)-capable actuator of the monodomain liquid crystal elastomer (xMLCEazo), developed using main-chain mesogenic oligomers containing azobenzene and allyl sulfide linkages, is ...
You-Jeong Jeong, Soo-young Park
semanticscholar   +1 more source

Review of Liquid Crystal Elastomers

2020
Chapter 20 reviews liquid crystal elastomers (LCEs), first discussed by Finkelmann. These materials can be used as robotic actuators via inducing a nematic–isotropic phase transition in them upon a temperature increase, which causes them to shrink, as described in a thorough review on these intelligent multi-functional materials by Brand and Finkelmann.
openaire   +1 more source

Chirality in Liquid Crystal Elastomers

2006
The coupling between the properties of conventional polymer networks and the properties of chiral liquid crystalline phases results in interesting, new opto- and electromechanical effects of the chiral liquid crystalline elastomers, as demonstrated by theoretical considerations and experiments.
Stein, Peter, Finkelmann, Heino
openaire   +2 more sources

Dynamics of Liquid Crystal Elastomers

2003
Abstract Among various dynamical properties of polymeric materials, an important and most fre-quently encountered is their mechanics. The equilibrium response of liquid crystalline elastomers can be soft or hard depending on the relation between the imposed strains and the nematic director, in particular, if the director is able to ...
M Warner, E M Terentjev
openaire   +1 more source