Self-heating evaluation on thermal analysis of polymethyl methacrylate (PMMA) and linear low-density polyethylene (LLDPE)

Abstract Thermal analysis has been proven to be an efficiently technique analyse thermal decomposition reactions of different type materials. This is widely used in fields. Among them, fire science, where polymeric materials are very common, a particular issue, being the combustion recurrent on these analyses. particularities depending studied material. For instance, could undergo that highly dependent definition boundary conditions. The International Confederation for Analysis and Calorimetry (ICTAC) (Vyazovkin et al. Thermochim Acta 590:1–23, 2014) standards (ISO 11358-1. Plastics—Thermogravimetry (TG) polymers—Part 1: General principles. ISO. 2014; https://www.iso.org/standard/59710.html. Accessed 31 Jan 2022), 11357-1. Plastics — Differential scanning calorimetry (DSC) Part 2016; https://www.iso.org/standard/70024.html. 2022) stablish how set-up conditions thermogravimetric differential standards. As far as initial amount sample mass concern, some discrepancies can found between suggest 10 100 mg TG 2 40 DSC, whereas ICTAC recommendations suggests times heating rate should not exceed K·min ?1 thermo-oxidative analysis, which equivalent samples masses lower than rates , or 5 20 . discrepancy may lead obtain results from tests. Additionally, according polymers, remarks influence thicknesses, carrier gas rates, but it does self-heating hazardous work presents study processes two polymers poly methyl methacrylate (PMMA) linear low-density polyethylene (LLDPE). TG/DSC tests evaluate processes. Boundary mass, atmospheres, considered its effect decomposition. It also includes check if follows theoretical principles affected by self-heating. In present study, series 32 experimental performed, analysing 16 These allow evaluating selected loss, heat flux, reactions. we temperature sample. Results show impact each effect, final measured they represent aid define suitable perform test PMMA LLDPE, similar polymer done evaluation parameters lags defined [1], fluxes, difference programmed temperature. analysed auto-ignition analysis. remarkable results. Finally, useful have defined.