Supporting research data for: Influence of cation structure with allyl group and a dicyanamide or trifluoromethanesulfonate anion on the glass transition and heat deflection temperatures of flax and carbon fiber reinforced epoxy composites

This dataset contains supporting research data for the publication "Influence of cation structure with allyl group and a dicyanamide or trifluoromethanesulfonate anion on the glass transition and heat deflection temperatures of flax and carbon fiber reinforced epoxy composites" published in Journal of Molecular Liquids (2025), DOI: https://doi.org/10.1016/j.molliq.2025.128739. The dataset includes: 1. Datasheet_NMR_DSC_DMTA.pdf – Raw analytical data including: 1H NMR spectra of halide salt precursors ([AMIM][Cl], [NA222][Cl], [APy][Cl]), DSC curves for ionic liquids and ionic liquid/epoxy resin systems, DMTA curves for carbon fiber and flax fiber reinforced composite structures. 2. Synthesis_procedures_and_other_protocols.pdf – Detailed synthesis procedures with yields and purity data (IC) for all obtained ionic liquids, analytical protocols for NMR, DSC, DMTA, HDT measurements, and composite preparation procedure. This work was supported by the National Science Centre (Poland), project PRELUDIUM (No. 2023/49/N/ST11/04057) and project SONATA BIS (No. 2017/26/E/ST8/01059).