Table 6 TGA mass losses and residual mass.

25–300 °C

Volatile compounds, softener

300–430 °C

Softener, shortened polymer chains due to chain scission

430–560 °C

Polymer

560–690 °C

Carbon black

690–820 °C

CO₂ from calcium carbonate (CaCO₃) scission

CaCO₃ content can be calculated by stoechiometric factor appr. 2.5

Residual mass at 900 °C

Mineral content, contains calcium oxide (CaO) from CaCO₃ degradation