Ta instrument q2000

Small pieces (approximately 5 mg) were cut from the filaments and the printed tensile specimens for the thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC).
The TGA tests were conducted on an SDT Q600—TA Instruments. All samples were heated from 25 to 800 °C at 20 °C /min under a nitrogen atmosphere.
The DSC tests were performed on TA Instrument Q2000 following the ASTM D3418 standard. First, the samples were heated from room temperature to 320 °C, then cooled to − 50 °C, then heated again to 300 °C, and finally cooled to room temperature. All heating/ cooling rates were 20 °C/ min under a nitrogen flow of 50 ml/min. The second heating cycle was performed to remove the thermal history of the specimens. The data were processed using Universal analysis (UA) -TA Instruments software. The crystallinity was calculated using the following equation: $$\%Crytallinity=\frac{{{\mathrm{\Delta }H}_m-\mathrm{\Delta }H}_{\mathit{cc}}}{{\mathrm{\Delta }H}_f}\times 100$$ where ${\mathrm{\Delta }H}_m$ is the area under the melting endotherm, $\mathrm{\Delta }{H}_{\mathit{cc}}$ is the area under the exotherm cold recrystallization peak from the first heating cycle, and ${\mathrm{\Delta }H}_f$ is the heat of fusion of a 100% crystalline PET of 140 J/g⁴¹ .