Table 2 Quantification of hydroxyl groups and chemical composition of kraft lignin.
From: Investigation of bio-based rigid polyurethane foams synthesized with lignin and castor oil
Sample | Hydroxyl (mmol/g) | Elemental analysis (wt%) | Ash content (wt%) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Phenolic | Carboxylic Acids | Aliphatic | Total (mmol/g) | |||||||||
H | G | S | C | H | N | Oa | S | |||||
KL | 0.21 | 2.18 | 0.67 | 0.24 | 1.61 | 4.91 | 61.2 | 5.8 | – | 30.7 | 1.7 | 2.3 ± 0.03 |
