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

Table 5

The percentage of the weight change of RPUFs with different loadings of LPCAs.

RPUF label	LPCA loading
F0	0 wt%	24.3%
F1	0.13 wt%	32.4%
F2	0.33 wt%	41.1%
F4	0.67 wt%	41.4%
F5	1.00 wt%	42.1%