Pyris tga

Dried samples are first weighed at 2.5–4 mg and then placed in a non-hermetic aluminum pan. The pan is sealed, and the thermal property is determined by DSC and TGA. For DSC (DSC 8000, Perkin Elmer, Shelton, CT, USA), the samples are investigated under the heating rate of 10 °C/min and the heating range of 50 °C to 300 °C under 40 mL/min of nitrogen gas flow. For TGA (Pyris TGA, Perkin Elmer, Shelton, CT, USA), 5 mg of each sample is weighed, placed in a non-hermetic aluminum pan, and sealed. The heating rate is 10 °C/min with a heating range of 50 °C to 300 °C under 200 mL/min of nitrogen gas flow. Meanwhile, dTGA is calculated using the rate of percent weight change at each time. The crystalline property of the dried sample was observed using a powder X-ray diffractometer (XRD; Rigaku, MiniFlex II, Tokyo, Japan) in the range of 3° to 40° 2θ. The spectra of the samples were also recorded using an FTIR spectrophotometer (Nicolet 4700, Madison, WI, USA). A small amount of sample was blended with potassium bromide and compressed with a plunger and die to produce a pellet using a hydraulic press (Carver Press, Wabash, IA, USA) at a compression pressure of 4 tons. The fabricated pellet was mounted in an FTIR chamber. The percent transmittance of the sample was recorded. The spectra were acquired at a resolution of 2 cm⁻¹ in the range of 400–4000 cm⁻¹.

TGA of complex polymer films was performed using Perkin Elmer Pyris TGA. Samples of 5–10 mg were heated from 30 (held for 5 min) to 600 °C (held for 5 min) in 10 °C/min steps under constant nitrogen flow (20 mL/min). The TGA data were used to plot TGA (weight loss vs. temperature) and the first derivative of the weight loss DTG curves.