Tga dsc 3 star system

The thermal transitions and the oxidation induction temperature (T_ox) of the compounded pellets and injection-molded samples were assessed by differential scanning calorimetry (DSC) using a Mettler-Toledo DSC 2 (Columbus, OH, USA). The samples were prepared according to [40 ] and [41 ]. The thermal transitions were measured in a nitrogen atmosphere with heating and cooling rates of 10 °C/min, and the T_ox measurements were performed using air as a purging gas at a heating rate of 10 °C/min. Duplicates were made in all cases. At measuring, for the heat of fusion (ΔH), the baseline was taken from 65 to 144 °C, and the results were reported for the first heating cycles. The degree of crystallinity (X_c) was assessed as X_c = ((ΔH/(w_PE-rigid × ΔH₀)) × 100) (%), where w_PE-rigid is the weight fraction of PE-rigid taken from the feedstock characterization for each type of material and the heat of fusion for 100% crystalline polyethylene ΔH₀ taken as 293 J/g [8 (link),42 (link)].
The ash content of the ground pellets was determined by thermogravimetric analysis (TGA) using a TGA/DSC 3+ Star system from Mettler Toledo (Columbus, OH, USA), where the 3.1 ± 0.1 mg samples were heated from 25 °C to 650 °C at a rate of 10 °C/min in air at a flow rate of 50 mL/min. Duplicate measurements were performed for each type of material, and the ash content values were determined at 600 °C.

Thermal gravimetric analysis (TGA) was used to
determine the thermal degradation onset temperatures and the residual
chars of the CNC films. Analyses were done on a TGA/DSC 3+ Star system
(Mettler Toledo, Greifensee Switzerland). Between 2 and 5 mg of each
film was placed in a 100 μL aluminum pan subjected to a heating
ramp from 25 to 500 °C at a rate of 10 °C/min under a 20
mL/min flow of nitrogen.