1. ABOUT THE DATASET -------------------- Title: Dataset associated with "Insight Into the Compositional-Dependent Transition from Auxetic Nematic to Frustrated Smectic in Liquid Crystal Elastomers" Creator(s): Emily J. Cooper [1], Stuart R. Berrow [1], Karine Margaryan [2], Gevorg Gevorgyan [2], Mariam Hakobyan [2], Thomas Raistrick [1], Ethan I.L. Jull [1], Devesh Mistry [1], Peter Hine [1], Aidan Street [1], Rafik Hakobyan [2], Helen F. Gleeson [1]. Organisation(s): [1]. University of Leeds, Leeds, U.K. [2]. Yerevan State University, Yerevan, Armenia. Rights-holder(s):Unless otherwise stated, Copyright 2026 University of Leeds. Publication Year: 2026 Description: This dataset contains the density, X-ray scattering, and mechanical measurements of a series of acrylate Liquid Crystal Elastomers. The mechanical measurements include the Young's moduli, Poisson's Ratio, and the auxetic threshold. Cite as: Emily J. Cooper, Stuart R. Berrow, Karine Margaryan, Gevorg Gevorgyan, Mariam Hakobyan, Thomas Raistrick, Ethan I.L. Jull, Devesh Mistry, Peter Hine, Aidan Street, Rafik Hakobyan, Helen F. Gleeson (2026): Dataset associated with "Insight Into the Compositional-Dependent Transition from Auxetic Nematic to Frustrated Smectic in Liquid Crystal Elastomers". University of Leeds. [Dataset] DOI: 10.5518/1822. Related publication: Emily J. Cooper, Stuart R. Berrow, Karine Margaryan, Gevorg Gevorgyan, Mariam Hakobyan, Thomas Raistrick, Ethan I.L. Jull, Devesh Mistry, Peter Hine, Aidan Street, Rafik Hakobyan, Helen F. Gleeson. "Insight Into the Compositional-Dependent Transition from Auxetic Nematic to Frustrated Smectic in Liquid Crystal Elastomers". Physical Review E. (2026) Submitted. Contact: H.F.Gleeson@leeds.ac.uk 2. TERMS OF USE --------------- Unless otherwise stated, this dataset is licensed under a Creative Commons Attribution 4.0 International Licence: https://creativecommons.org/licenses/by/4.0/. 3. PROJECT AND FUNDING INFORMATION ---------------------------------- Main Funding Project Title: Stretching the boundaries; new soft matter systems. Dates of Project: August 2022 - August 2027. Funding organisation: Engineering and Physical Sciences Research Council (EPSRC) Grant no.: EP/V054724/1 Additional grants to acknowledge: EP/T517860/1 (EPSRC), 21AG-1C088 (Higher Education and Science Committee of the RA), Leverhulme Trust, Northern Triangle Initiative. 4. CONTENTS ----------- Figure_1.zip: Contains a single spreadsheet file, which includes the density of LCEs data plotted in Figure 1. Figure_2.zip: Zip folder containing the X-ray scattering data files (.h5z format) for the three LCEs used in Figure 2 (sLCE-75, iLCE-67, nLCE-66). Each material has its own folder containing SAXS and WAXS files of the material and the calibration. A summary spreadsheet of the radial 2D data is also included. Figure_3.zip: Contains a single spreadsheet file, which includes the X-ray and correlation length data for LCEs plotted in Figure 3. The complete X-ray data is provided seperately in 'X-ray Scattering files.zip'. Figure_4.zip: Contains a single spreadsheet file of the Young's Moduli and Poisson's Ratio values for LCEs at 21 degrees Celcius, which are plotted in Figure 4. X-ray Scattering files.zip: Contains all the X-ray Scattering data (.h5z format) for LCEs between 56 mol% and 75 mol% mesogenic content used in this work. For each material a calibration is provided. Figure_S1.zip: The strain data used for nLCE-62, nLCE-64, and nLCE-66 used in Figure S1, demonstrating the auxetic threshold. Figure S1 is in the Supplemental Material. Figure_S2.zip: Contains the X-ray Scattering data files used for Figure S2A-D. All files are of the material nLCE-62 for two different orientations. Figure S2 is in the Supplemental Material. Figure_S3.zip: Contains the X-ray Scattering data files used in Figure 3A-D. Figure S3 is in the Supplemental Material. Figure_S4.zip: Contains a single spreadsheet of the radial 2D X-ray Scattering data plotted in Figure S4, for both WAXS (Sheet 1) and SAXS (Sheet 2). The X-ray scattering files can be accessed in 'X-ray Scattering files.zip'. Figure S4 is in the Supplemental Material. Figure_S5.zip: Contains the glass transition temperature data plotted in Figure S5, and all the data is taken from previous literature for LCEs, LCNs, and polyEHA [11,25,37]. Figure S5 is in the Supplemental Material. Figure_S8.zip: The Young's Moduli of the LCEs plotted in Figure S8, measured at temperatures of 18 and 21 degrees Celcius. Figure S8 is in the Supplemental Material. Figure_S9.zip: The Poisson's Ratio of the LCEs plotted in Figure S9, measured at temperatures of 18 and 21 degrees Celcius. Figure S9 is in the Supplemental Material. For strain data used in Figure S7, please contact Rafik Hakobyan at rhakob@ysu.am 5. METHODS ---------- For detailed experimental and analytical methods, please refer to the following publication and its Supplemental Material: Related publication: Emily J. Cooper, Stuart R. Berrow, Karine Margaryan, Gevorg Gevorgyan, Mariam Hakobyan, Thomas Raistrick, Ethan I.L. Jull, Devesh Mistry, Peter Hine, Aidan Street, Rafik Hakobyan, Helen F. Gleeson. "Insight Into the Compositional-Dependent Transition from Auxetic Nematic to Frustrated Smectic in Liquid Crystal Elastomers". Physical Review E. (2026) Submitted.