Influence of Swelling on the Shear Mechanical Properties of Monodomain Side-Chain Liquid-Crystal Elastomers: Gaussian Versus Non-Gaussian Elasticity
✍ Scribed by Daniel Rogez; Felicitas Brömmel; Heino Finkelmann; Philippe Martinoty
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 493 KB
- Volume
- 212
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
The shear mechanical properties of nematic side‐chain liquid‐crystal elastomers swollen with a nematic solvent are studied. The results show that the elasticity of the network is Gaussian for elastomers oriented before crosslinking and non‐Gaussian for the usual twice‐crosslinked elastomers oriented by stretching the network formed after the first crosslinking step. For systems oriented before crosslinking, a crossover between Gaussian and non‐ Gaussian behavior is observed at a particular weight concentration of solvent. In contrast to the current belief, the neoclassical model based on Gaussian rubber elasticity cannot provide a correct description of the twice‐crosslinked systems.