Innovative Application of Biopolymer Keratin as a Filler of Synthetic Acrylonitrile-Butadiene Rubber NBR

Table 5

Thermal analyses of filled and unfilled vulcanizates of acrylonitrile-butadiene rubber NBR.

Thermal analysis
Symbol	Parameters
	𝑇5 [°C]	𝑇50 [°C]	𝑃800 [%]
Standard	280	430	24
Sample II	330	450	26

𝑇₅—temperature at which the sample weight loss is 5% [°C] 
𝑇₅₀—temperature at which the sample weight loss is 50% [°C] 
𝑃₈₀₀—residue after the sample thermal decomposition in 𝑇=800°C [%].