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  • Title: Main-chain smectic liquid-crystalline polymers as randomly disordered systems.
    Author: Muresan AS, Ostrovskii BI, Sánchez-Ferrer A, Finkelmann H, de Jeu WH.
    Journal: Eur Phys J E Soft Matter; 2006 Apr; 19(4):385-8. PubMed ID: 16583151.
    Abstract:
    We report a high-resolution X-ray lineshape study of main-chain smectic polymers. The results indicate that the layer ordering differs fundamentally from the algebraic decay typical for other smectic liquid-crystalline systems. The lineshapes are best described by broad squared Lorentzians indicating some form of short-range correlations. However, several higher harmonics are observed, which excludes simple liquid-like short-range order. This behaviour is tentatively attributed to a random field of defects associated with entangled hairpins in the main-chain polymer structure.
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