Table 4 Thermogravimetric parameters of PU and W–PU foams containing varying contents of lignin

Sample

T₀ (°C)

T_max (°C)

T_50% (°C)

Char residue (%)

Lignin

183.2

374.6

552.9

42.9

PU

284.4

316.5

386.1

21.3

PU/L5

282.1

320.3

371.5

22.3

PU/L10

278.2

323.5

381.4

22.7

PU/L15

274.7

325.6

384.1

23.0

PU/L20

271.7

328.4

385.9

24.6

W–PU

257.9

309.0

362.7

22.7

W–PU/L5

250.8

312.9

365.5

23.2

W–PU/L10

249.6

311.5

371.9

24.7

W–PU/L15

248.7

311.8

373.2

26.6

W–PU/L20

248.2

311.0

396.7

31.3