Figure 4
From: Investigation of bio-based rigid polyurethane foams synthesized with lignin and castor oil
FTIR spectra of (a) kraft lignin, (b) LPU, (c) lpu and (d) CPU.
Figure 4 | Scientific Reports
From: Investigation of bio-based rigid polyurethane foams synthesized with lignin and castor oil
FTIR spectra of (a) kraft lignin, (b) LPU, (c) lpu and (d) CPU.
