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

Table 6

The influence of keratin on the mechanical properties of NBR vulcanizates after and before soil test.

Properties	Symbol
	Standard		Sample II
	After	Before soil test	After	Before soil test
TS—tensile strength [MPa]	2,23	2,20	2,90	2,47
Eb—elongation at a break [%]	352	320	392	365