Effect of stretching angle on the stress plateau behavior of main-chain liquid crystal elastomers

Soft Matter ◽  
2021 ◽  
Vol 17 (11) ◽  
pp. 3128-3136
Author(s):  
Suzuka Okamoto ◽  
Shinichi Sakurai ◽  
Kenji Urayama
Keyword(s):  
Liquid Crystal ◽  
Main Chain ◽  
Stress Plateau ◽  
Liquid Crystal Elastomer ◽  
Ultimate Elongation ◽  
Liquid Crystal Elastomers

Stretching angle for a main-chain liquid crystal elastomer has pronounced effects on the width of the stress plateau as well as the ultimate elongation, while it has no effect on the plateau height.

Liquid-crystal order during synthesis affects main-chain liquid-crystal elastomer behavior

Soft Matter ◽  
2017 ◽  
Vol 13 (39) ◽  
pp. 7013-7025 ◽  
Author(s):  
N. A. Traugutt ◽  
R. H. Volpe ◽  
M. S. Bollinger ◽  
M. O. Saed ◽  
A. H. Torbati ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Main Chain ◽  
Mechanical Behaviors ◽  
Liquid Crystal Elastomer ◽  
Liquid Crystal Elastomers

This study presents the first direct comparison of the influence of liquid-crystal order during synthesis on the thermo-mechanical behaviors of main-chain liquid-crystal elastomers (LCEs) in thiol–acrylate networks.

Microscopy of Diffuse Nematic–Isotropic Transition in Main-Chain Nematic Liquid-Crystal Elastomers

2021 ◽  
Vol 54 (8) ◽  
pp. 3678-3688
Author(s):  
Takuya Ohzono ◽  
Kaoru Katoh ◽  
Eugene M. Terentjev
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Main Chain ◽  
Liquid Crystal Elastomers

Bio-inspired thermal-responsive inverse opal films with dual structural colors based on liquid crystal elastomer

2015 ◽  
Vol 3 (17) ◽  
pp. 4424-4430 ◽  
Author(s):  
Huihui Xing ◽  
Jun Li ◽  
Jinbao Guo ◽  
Jie Wei
Keyword(s):  
Liquid Crystal ◽  
Inverse Opal ◽  
Liquid Crystal Elastomer ◽  
Structural Colors ◽  
Thermal Switching ◽  
Liquid Crystal Elastomers

The fabrication of inverse opal micropatterns based on liquid crystal elastomers with dual structural colors and their thermal switching behaviors are described.

Deuteron NMR investigation on orientational order parameter in polymer dispersed liquid crystal elastomers

2020 ◽  
Vol 22 (40) ◽  
pp. 23064-23072
Author(s):  
Andraž Rešetič ◽  
Jerneja Milavec ◽  
Valentina Domenici ◽  
Blaž Zupančič ◽  
Alexej Bubnov ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Order Parameter ◽  
Orientational Order ◽  
Orientational Order Parameter ◽  
Liquid Crystal Elastomer ◽  
H Nmr ◽  
Polymer Dispersed Liquid Crystal ◽  
Polymer Dispersed ◽  
Liquid Crystal Elastomers ◽  
Magnetically Aligned

Orientational order parameter of magnetically aligned liquid crystal elastomer particles suspended in a cured silicone matrix is assessed using 2H-NMR spectroscopy. Obtained results correspond well with the composite's thermomechanical response.

Thermomechanical properties of monodomain nematic main-chain liquid crystal elastomers

Soft Matter ◽  
2018 ◽  
Vol 14 (29) ◽  
pp. 6024-6036 ◽  
Author(s):  
Daniel R. Merkel ◽  
Nicholas A. Traugutt ◽  
Rayshan Visvanathan ◽  
Christopher M. Yakacki ◽  
Carl P. Frick
Keyword(s):  
Liquid Crystal ◽  
Main Chain ◽  
Reaction Scheme ◽  
Thermomechanical Properties ◽  
Two Stage ◽  
Liquid Crystal Elastomers

Actuation temperature was controlled without influencing total actuation performance in liquid crystal elastomers fabricated by a two-stage reaction scheme.

Main-chain liquid-crystal elastomers versus side-chain liquid-crystal elastomers: similarities and differences in their mechanical properties

Soft Matter ◽  
2018 ◽  
Vol 14 (31) ◽  
pp. 6449-6462 ◽  
Author(s):  
D. Rogez ◽  
S. Krause ◽  
P. Martinoty
Keyword(s):  
Mechanical Properties ◽  
Liquid Crystal ◽  
Main Chain ◽  
Poisson Ratio ◽  
Side Chain ◽  
Similarities And Differences ◽  
Liquid Crystal Elastomers

The shear and Young moduli, the poly-domain to mono-domain transition, the Poisson ratio and the supercritical or subcritical nature of main-chain and side-chain liquid-crystal elastomers are characterized with various mechanical experiments.

scholarly journals Dual relaxation and structural changes under uniaxial strain in main-chain smectic-C liquid crystal elastomer

2015 ◽  
Vol 17 (1) ◽  
pp. 191-199 ◽  
Author(s):  
Dena M. Agra-Kooijman ◽  
Michael R. Fisch ◽  
Leela Joshi ◽  
Wanting Ren ◽  
Philip J. McMullan ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Relaxation Rate ◽  
Structural Changes ◽  
Main Chain ◽  
Uniaxial Strain ◽  
Liquid Crystal Elastomer ◽  
Smectic C ◽  
Dual Relaxation

Relaxation rate of the chevron angle, α becomes about ten times faster at strains exceeding 0.7 than at low strains.

Unsymmetric main-chain liquid crystal elastomers with tunable phase behaviour: elastic response

2011 ◽  
Vol 21 (23) ◽  
pp. 8436 ◽  
Author(s):  
Maria Amela-Cortés ◽  
Duncan W. Bruce ◽  
Kenneth E. Evans ◽  
Christopher W. Smith
Keyword(s):  
Liquid Crystal ◽  
Main Chain ◽  
Phase Behaviour ◽  
Elastic Response ◽  
Liquid Crystal Elastomers

The effect of alignment on the rate-dependent behavior of a main-chain liquid crystal elastomer

Soft Matter ◽  
2020 ◽  
Vol 16 (38) ◽  
pp. 8782-8798
Author(s):  
Cristina P. Martin Linares ◽  
Nicholas A. Traugutt ◽  
Mohand O. Saed ◽  
Alejandro Martin Linares ◽  
Christopher M. Yakacki ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Strain Field ◽  
Main Chain ◽  
Liquid Crystal Elastomer ◽  
Rate Dependent ◽  
Dependent Behavior

This study investigated the effect of alignment on the rate-dependent behavior of a main-chain liquid crystal elastomer (LCE). 3D-DIC was used to track the strain field and showed heterogeneous regions of strain from meson relaxation.

scholarly journals Shape-programmable liquid crystal elastomer structures with arbitrary three-dimensional director fields and geometries

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yubing Guo ◽  
Jiachen Zhang ◽  
Wenqi Hu ◽  
Muhammad Turab Ali Khan ◽  
Metin Sitti
Keyword(s):  
Liquid Crystal ◽  
Three Dimensional ◽  
Heterogeneous Material ◽  
Two Dimensions ◽  
Three Dimensions ◽  
Field Orientation ◽  
Liquid Crystal Elastomer ◽  
Material Sample ◽  
Liquid Crystal Elastomers ◽  
Thermally Triggered

AbstractLiquid crystal elastomers exhibit large reversible strain and programmable shape transformations, enabling various applications in soft robotics, dynamic optics, and programmable origami and kirigami. The morphing modes of these materials depend on both their geometries and director fields. In two dimensions, a pixel-by-pixel design has been accomplished to attain more flexibility over the spatial resolution of the liquid crystal response. Here we generalize this idea in two steps. First, we create independent, cubic light-responsive voxels, each with a predefined director field orientation. Second, these voxels are in turn assembled to form lines, grids, or skeletal structures that would be rather difficult to obtain from an initially connected material sample. In this way, the orientation of the director fields can be made to vary at voxel resolution to allow for programmable optically- or thermally-triggered anisotropic or heterogeneous material responses and morphology changes in three dimensions that would be impossible or hard to implement otherwise.

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