Study on the Preparation and Application of Lignin-Derived Polycarboxylic Acids

Table 4

The mechanical properties of WPU elastomers.

	Blank WPU elastomer	LPCA-WPU elastomer
LPCAs loading	0 wt.%	2.5 wt.%
Tensile stress at 100% strain (MPa)	2.96 ± 0.12	6.97 ± 0.37
Tensile stress at 300% strain (MPa)	5.16 ± 0.07	9.83 ± 0.49
Modulus of elasticity in tension (MPa)	22.2 ± 1.6	107.1 ± 6.1
Tensile strength (MPa)	13.48 ± 1.73	18.60 ± 1.37
Tensile strain at break (%)	736 ± 108	707 ± 31