Preparation and Characterization of Rigid Polyurethane Foams with Different Loadings of Lignin-Derived Polycarboxylic Acids

Table 1

The amount of LPCAs, the loading of LPCAs, and the label of RPUFs.

RPUF label	LPCA amount	LPCA loading
F0	0 g	0 wt%
F1	0.02 g	0.13 wt%
F2	0.05 g	0.33 wt%
F3	0.08 g	0.53 wt%
F4	0.10 g	0.67 wt%
F5	0.15 g	1.00 wt%