UV isomerisation in nematic elastomers as a route to photo-mechanical transducer
نویسندگان
چکیده
منابع مشابه
UV isomerisation in nematic elastomers as a route to photo-mechanical transducer.
The macroscopic shape of liquid-crystalline elastomers strongly depends on the order parameter of the mesogenic groups. This order can be manipulated if photo-isomerisable groups, e.g. containing N=N bonds, are introduced into the material. We have explored the large photo-mechanical response of such an azobenzene-containing nematic elastomer at different temperatures, using force and optical b...
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A range of monodomain nematic liquid-crystal elastomers containing differing proportions of photoisomerizable mesogenic moieties, which turn from a rodlike to a kinked shape upon ultraviolet (uv) irradiation, was studied. Depending on the proportion and positional role of the photosensitive groups in the crosslinked polymer network, different types and magnitudes of response were found. The pri...
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SUMMARY. New analytical and computational results on the static and dynamic response of ne-matic elastomers to applied electric fields and mechanical loads are reviewed, and compared with the available experimental evidence. 1 INTRODUCTION Nematic elastomers display a peculiar mechanical response arising from the interplay between the electro-optical properties of liquid crystals and the elasti...
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We review in these lecture notes some of our recent work on modelling the response of nematic elastomers to applied mechanical loads and/or to electric fields, both in the static and in the dynamic regime. Our aim is to compare theoretical results based on mathematical analysis and on numerical simulations with the available experimental evidence, in order to examine critically the various rece...
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We investigate the behavior of the shear rigidity modulus G = G' + iG" of three mono-domain side chain liquid-crystalline elastomers composed of side chain polysiloxanes cross-linked by either flexible or rigid cross-linkers. The measurements were taken in a frequency domain ranging from approximately 0.02 Hz to approximately 10(4) Hz applying the shear in a plane perpendicular to or containing...
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ژورنال
عنوان ژورنال: The European Physical Journal E
سال: 2002
ISSN: 1292-8941
DOI: 10.1140/epje/i2002-10095-y