Influence of Swelling on the Shear Mechanical Properties of Monodomain Side-Chain Liquid-Crystal Elastomers: Gaussian Versus Non-Gaussian Elasticity

2011 ◽  
Vol 212 (24) ◽  
pp. 2667-2673 ◽  
Author(s):  
Daniel Rogez ◽  
Felicitas Brömmel ◽  
Heino Finkelmann ◽  
Philippe Martinoty
Keyword(s):  
Mechanical Properties ◽  
Liquid Crystal ◽  
Side Chain ◽  
Liquid Crystal Elastomers ◽  
Non Gaussian

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 Effect of Isomeric Amine Chain Extenders and Crosslink Density on the Properties of Liquid Crystal Elastomers

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3094
Author(s):  
Yoojin Lee ◽  
Subi Choi ◽  
Beom-Goo Kang ◽  
Suk-kyun Ahn
Keyword(s):  
Mechanical Properties ◽  
Liquid Crystal ◽  
Molecular Engineering ◽  
Side Chain ◽  
Aerospace Medicine ◽  
Different Types ◽  
Chain Extenders ◽  
Liquid Crystal Elastomers ◽  
Soft Actuators ◽  
Significant Attention

Among the various types of shape changing materials, liquid crystal elastomers (LCEs) have received significant attention as they can undergo programmed and reversible shape transformations. The molecular engineering of LCEs is the key to manipulating their phase transition, mechanical properties, and actuation performance. In this work, LCEs containing three different types of butyl groups (n-, iso-, and sec-butyl) in the side chain were synthesized, and the effect of isomeric amine chain extenders on the thermal, mechanical, and actuation properties of the resulting LCEs was investigated. Because of the considerably low reactivity of the sec-butyl group toward the diacrylate in the LC monomer, only a densely crosslinked LCE was synthesized. Most interestingly, the mechanical properties, actuation temperature, and blocking stress of the LCEs comprising isobutyl groups were higher than those of the LCEs comprising n-butyl groups. This difference was attributed to the presence of branches in the LCEs with isobutyl groups, which resulted in a tighter molecular packing and reduced the free volume. Our results suggest a facile and effective method for synthesizing LCEs with tailored mechanical and actuation properties by the choice of chain extenders, which may advance the development of soft actuators for a variety of applications in aerospace, medicine, and optics.

Liquid Crystal Elastomers with Mechanical Properties of a Muscle

2001 ◽  
Vol 34 (17) ◽  
pp. 5868-5875 ◽  
Author(s):  
Donald L. Thomsen ◽  
Patrick Keller ◽  
Jawad Naciri ◽  
Roger Pink ◽  
Hong Jeon ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Liquid Crystal ◽  
Liquid Crystal Elastomers

scholarly journals Study of the optical, thermal, and mechanical properties of nematic liquid crystal elastomers

2016 ◽  
Vol 17 (4) ◽  
pp. 169-176 ◽  
Author(s):  
Santosh A. Mani ◽  
Sameer U. Hadkar ◽  
P. J. Jessy ◽  
Suman Lal ◽  
Patrick Keller ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Thermal And Mechanical Properties ◽  
Liquid Crystal Elastomers

scholarly journals Effects of Structural Variations on the Cellular Response and Mechanical Properties of Biocompatible, Biodegradable, and Porous Smectic Liquid Crystal Elastomers

2016 ◽  
Vol 17 (2) ◽  
pp. 1600278 ◽  
Author(s):  
Anshul Sharma ◽  
Taizo Mori ◽  
Cory J. Mahnen ◽  
Heather R. Everson ◽  
Michelle T. Leslie ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Liquid Crystal ◽  
Cellular Response ◽  
Structural Variations ◽  
Smectic Liquid Crystal ◽  
Liquid Crystal Elastomers
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