Functional Photochromic Methylhydrosiloxane‐Based Side‐Chain Liquid‐Crystalline Polymers. Issue 8 (24th March 2014)

• Record Type: Journal Article
• Authors: Tóth‐Katona, Tibor; Cigl, Martin; Fodor‐Csorba, Katalin; Hamplová, Věra; Jánossy, István; Kašpar, Miroslav; Vojtylová, Terezia; Hampl, František; Bubnov, Alexej
• Is Part Of: Macromolecular chemistry and physics. Volume 215:Issue 8(2014:Apr.)
• Page Start: 742
• Page End: 752
• Publication Date: 2014-03-24
• Subjects: Polymers -- Periodicals; Polymerization -- Periodicals; Synthetic products -- Periodicals; Macromolecules -- Periodicals; 547.7
• DOI: 10.1002/macp.201300729
• Languages: English
• ISSNs: 1022-1352

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>A new azobenzene‐group‐containing monomer and several respective functional side‐chain polymers grafted on a methylhydrosiloxane backbone (with two different degrees of poly­merization; with and without the addition of a photoreactive benzophenone derivative) are designed, synthesized, and characterized. The resulting materials clearly show self‐assembly behavior and possess a nematic liquid‐crystal phase over a broad temperature range, which extends below 0 °C. The optical properties of these new photo­chromic liquid‐crystalline materials are determined from the absorbance spectra of oriented samples and by photo­induced birefringence studies. The results indicate a considerable dichroism of the side‐chain liquid‐crystalline polymers (SCLCPs), and hence demonstrate their potential applicability for optical storage. <boxed-text content-type="graphic" position="anchor" orientation="portrait"><graphic position="anchor" mimetype="image" xlink:href="ark:/27927/pgg5bxs654p" orientation="portrait" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></boxed-text></p> </abstract>