Table 3. Values of the Percent Weight Loss at Various Temperature Ranges for Different Sources of Lignin.

	types of lignin
	ionic liquid-extracted lignin		alkali lignin
degradation stages	range of T (°C)	% wt loss	range of T (°C)	% wt loss
phase I	38–100	10	38–110	10
phase II	190–340	35	220–390	24
phase III	above 340	24	above 390	15