Calorimetric study of the Paranematic-to-Nematic transition of polydomain side-chain liquid-crystalline elastomers with different mesogen composition

Cordoyiannis G.; Ro?i? B.; Finkelmann H.; ?umer S.; Kutnjak Z.

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Calorimetric study of the Paranematic-to-Nematic transition of polydomain side-chain liquid-crystalline elastomers with different mesogen composition

机译：不同液晶元组成的多畴侧链液晶弹性体的向列相向向列相转化的量热研究

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The phase transition behaviour of various nematic side-chain liquid-crystalline elastomers with different mesogen composition has been explored by means of high-resolution ac calorimetry. Polydomain samples of the same crosslinking density and different type of mesogens have been investigated. The results show a strong dependence of the phase transition features upon the composition of the mesogen. The distance from the critical point, reflected in the sharpness of the heat capacity anomalies, increases when adding a shorter-length mesogen. The results provide new insight for the impact of mesogens on the thermodynamic behaviour and, thus, on the thermomechanical response of nematic liquid-crystalline elastomers.

机译：已经通过高分辨率交流量热法研究了具有不同液晶元组成的各种向列型侧链液晶弹性体的相变行为。研究了具有相同交联密度和不同类型液晶元的多域样品。结果表明，相变特征强烈依赖于液晶元的组成。当添加较短长度的液晶元时，热临界点的锐度反映出到临界点的距离会增加。结果为介晶对热力学行为的影响，从而对向列液晶弹性体的热机械响应提供了新的见解。

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《The European physical journal, E. Soft matter》 |2010年第3期|共5页
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Cordoyiannis G.; Ro?i? B.; Finkelmann H.; ?umer S.; Kutnjak Z.;
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1. Calorimetric study of the Paranematic-to-Nematic transition of polydomain side-chain liquid-crystalline elastomers with different mesogen composition [J] . Cordoyiannis G., Ro?i? B., Finkelmann H., The European physical journal, E. Soft matter . 2010,第3期

机译：不同液晶元组成的多畴侧链液晶弹性体的向列相向向列相转化的量热研究
2. Side-chain liquid-crystalline poly(ketone)s: effect of spacer length, mesogen type and mesogen density on mesomorphic behavior [J] . Nieuwhof RP., Sudholter EJR., Wursche R., Macromolecular chemistry and physics . 2000,第17期

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3. Highly birefringent liquid-crystalline polymers for photonic applications: synthesis of liquid-crystalline polymers with side-chain azo-tolane mesogens and their holographic properties [J] . Okano K, Shishido A, Tsutsumi O, Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology . 2005,第33期

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4. Effect of Two Different Mesogens on Liquid-Crystalline Properties of Chiral Side-Chain Liquid-Crystalline Polysiloxanes [C] . Jiwei Wang, Junqing Zi, Lixian He, International Conference on Advances in Materials and Manufacturing Processes . 2012

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5. Thermodynamics of the helix -coil transition: Calorimetric and spectroscopic studies. [D] . Richardson, John M., III. 2005

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6. Modeling the Polydomain–Monodomain transition of Liquid Crystal Elastomers [O] . Jonathan K. Whitmer, Tyler F. Roberts, Raj Shekhar, -1

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Calorimetric study of the Paranematic-to-Nematic transition of polydomain side-chain liquid-crystalline elastomers with different mesogen composition

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