Order and strain in main-chain smectic liquid-crystalline polymers and elastomers.

The European Physical Journal. E, Soft Matter
Wim H de JeuHeino Finkelmann

Abstract

The layer correlations in main-chain smectic liquid-crystal polymer and elastomer systems have been studied using high-resolution X-ray scattering. In contrast to side-chain smectic polymers, in main-chain systems the polymer chains are oriented parallel to the layer normal. As a result they couple directly to the lamellar structure and any polymer defect is translated into layer distortions. For the homopolymers the resulting X-ray lineshapes are well described by Lorentzians. This is interpreted as an average of algebraically decaying order in domains with dimensions of hundreds of nm and a wide dispersion of sizes. The elastomers show much broader peaks than the correponding polymers. This is attributed to strong non-uniform strain within the finite-size domains due to defects of the layer structure.

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Citations

Apr 17, 2012·The Journal of Chemical Physics·Prabir K Mukherjee
May 2, 2012·Progress in Nuclear Magnetic Resonance Spectroscopy·Valentina Domenici
Mar 25, 2011·Macromolecular Rapid Communications·Antoni Sánchez-Ferrer, Heino Finkelmann
Mar 25, 2011·Macromolecular Rapid Communications·Sönke HaselohRudolf Zentel
Jun 1, 2010·Advanced Materials·Christian OhmRudolf Zentel
Mar 19, 2013·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Marko GregorcIrena Drevenšek-Olenik

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