Research Data Leeds Repository

Citation

Mistry, Devesh and Morgan, Philip and Clamp, John H. and Gleeson, Helen (2017) Dataset associated with 'New insights into the nature of semi-soft elasticity and “mechanical-Fréedericksz transitions” in liquid crystal elastomers'. University of Leeds. [Dataset] https://doi.org/10.5518/131

Dataset description

This dataset provides results of characterisation of a low glass transition temperature acrylate-Liquid Crystal Elastomer. Opto-mechanical and thermal experiment led to the calculation of a range of values for the step length anisotropy, r, of the polymer conformation. Values were calculated using the theiries of Verywey, Warner and Terentjev, and Bladon, Warner and Terentjev. Their disagreement implies the currently accepted theory of LCEs is not yet completed. The key observation of these results is that it is possible to mechanically change the order parameter of the LCE. Using geometrical arguments and bierfringence textures, we infer it is possible to obtain a state of negative liquid crystal ordering.

Keywords:	liquid crystals, liquid crystal elastomers, soft matter, anisotropy, soft elasticity, polymerization, mechanical testing
Subjects:	F000 - Physical sciences > F300 - Physics
Divisions:	Faculty of Engineering and Physical Sciences > School of Physics and Astronomy
Related resources:	Location Type https://eprints.whiterose.ac.uk/124754/ Publication https://doi.org/10.1039/c7sm02107k Publication
License:	Creative Commons Attribution 4.0 International (CC BY 4.0)
Date deposited:	14 Dec 2017 19:01
URI:	https://archive.researchdata.leeds.ac.uk/id/eprint/290
Additional details Additional details Creators or authors: Creators ORCID Other ID Email Primary affiliation Primary affiliation ID Primary affiliation ID type Secondary affiliation Secondary affiliation ID Secondary affiliation ID type Mistry, Devesh https://orcid.org/0000-0003-0012-6781 University of Leeds https://ror.org/024mrxd33 ror Morgan, Philip https://orcid.org/0000-0003-0680-8169 University of Manchester https://ror.org/027m9bs27 ror Clamp, John H. UltraVision CLPL Gleeson, Helen https://orcid.org/0000-0002-7494-2100 University of Leeds https://ror.org/024mrxd33 ror Type of data: Dataset Research funders: EPSRC, UltraVision CLPL, Royal Commission for the Exhibition of 1851 Publication date: 2017 Resource language: English Metadata language: English Research project title: Novel liquid crystal elastomer devices Publisher: University of Leeds Contact email: pydam@leeds.ac.uk Last Modified: 09 Aug 2024 14:04

Files

Documentation

Supplementary Information [1MB] Supplementary Information [1MB] Supplementary Information [1MB] Security: Anyone File name: supplementary_information.pdf Content type: Documentation Description: Includes dataset structure Mime-Type: application/pdf File size: 1MB

Data

figure 1 example of SSE [60kB] figure 1 example of SSE [60kB] figure 1 example of SSE [60kB] Security: Anyone File name: figure_1_example_of_sse.zip Content type: Data Description: Plotting file of example of mechanical behaviour typically reported in LCEs. Our observations broadly the same shape but the underlying physics is different but unknown. Mime-Type: application/zip File size: 60kB

figure 2 chemical diagrams [108kB] figure 2 chemical diagrams [108kB] figure 2 chemical diagrams [108kB] Security: Anyone File name: figure_2_chemical_diagrams.zip Content type: Data Description: Diagrams of chemical structures for compenents used in this work to create the LCEs. Chemdraw, eps, inkscape CVG and png file. Mime-Type: application/zip File size: 108kB

figure 3 polarising microscopy images [1MB] figure 3 polarising microscopy images [1MB] figure 3 polarising microscopy images [1MB] Security: Anyone File name: figure_3_polarising_microscopy_images.zip Content type: Data Description: Polarising micrscopy example images of a sample. Uniformity of both images and high contrast between images is indicative of a high quality of LC alignment. Image, figure, gnuplot plotting, text and python files. Mime-Type: application/zip File size: 1MB

figure 4 and 5 opto-mechanical data [105MB] figure 4 and 5 opto-mechanical data [105MB] figure 4 and 5 opto-mechanical data [105MB] Security: Anyone File name: figure_4_and_5_opto-mechanical_data.zip Content type: Data Description: opto-mechanical data for the mechanical deformation of the LCEs. Raw data folders contain the analysis of the photographs and datalogging files along with complete sets of the raw data. Image, figure, gnuplot plotting, text and python files.The raw data Mime-Type: application/zip File size: 105MB

figure 7 birefringence on heating [82MB] figure 7 birefringence on heating [82MB] figure 7 birefringence on heating [82MB] Security: Anyone File name: figure_7_birefringence_on_heating.zip Content type: Data Description: Data studying the geometry and birefringence of a small sample of LCE as it is heated from room temperature to 330°C. A Berek compensator was used to determine the retardance with temperature and the thickness chamge was determined from photographs uing t Mime-Type: application/zip File size: 82MB

figure 8 in plane polymer conformation evolution [190kB] figure 8 in plane polymer conformation evolution [190kB] figure 8 in plane polymer conformation evolution [190kB] Security: Anyone File name: figure_8_in_plane_polymer_conformation_evolution.zip Content type: Data Description: Diagram of the proposed method of deformation for the inplane projection of the polymer conformation. Figure files. Mime-Type: application/zip File size: 190kB

figure 9 LC-backbone coupling types [380kB] figure 9 LC-backbone coupling types [380kB] figure 9 LC-backbone coupling types [380kB] Security: Anyone File name: figure_9_lc-backbone_coupling_types.zip Content type: Data Description: Diagram of the different types of LC-backbone couplings possible in LCEs. In this work the mesogens are of side-chain end on type. Figure files. Mime-Type: application/zip File size: 380kB

gnuplot plotting config files [2kB] gnuplot plotting config files [2kB] gnuplot plotting config files [2kB] Security: Anyone File name: gnuplot_plotting_config_files.zip Content type: Data Description: Configuration files used to generate the plotting files. Individual plotting scripts will need to be updated to link to these files correctly. gnuplot configuration files Mime-Type: application/zip File size: 2kB

Supplementary figures [8MB] Supplementary figures [8MB] Supplementary figures [8MB] Security: Anyone File name: supplementary_figures.zip Content type: Data Description: Contains files used to generate figures shown in the supplementary information of the associated paper. Mime-Type: application/zip File size: 8MB