TABLE 2.

DSC parameter values of neat PLA, PLA/KL and PLA/OPKL composites: T_g—glass transition temperature, T_cc—cold crystallization temperature and T_m1 and T_m2—melting temperatures from first heating scan.

	Lignin (%)	DSC values (°C)
		First scan				Second scan
		Tg	Tcc	Tm1	Tm2	Tcc	Tm	ΔH (J/g)	χα
Neat PLA		60.3	102.6	147	153	117.3	148.5	16.30	17.52%
PLA/KL	1	58.5	100.5	148	153	118.8	149.5	18.51	20.10%
	5	58.1	101.2	146	153	120.7	149.6	14.14	16.00%
	10	58.4	101.8	147	151	122.8	149.4	12.71	15.18%
	20	57.0	109.6	147	151	130.8	150.8	7.68	10.32%
	40	59.7	96.6	-	150	134.5	151.5	2.25	4.03%
PLA/OPKL	1	60.5	100.3	147	153	117.5	148.8	17.57	19.08%
	5	59.6	101.9	147	152	121.4	149.8	15.61	17.67%
	10	59.9	100.4	147	151	125.6	150.6	12.95	15.48%
	20	52.9	105.9	147	152	124.9	149.5	9.39	12.63%
	40	56.8	111.0	148	152	127.8	150.3	3.21	5.75%

Crystallinity χ ^α = (∆H/∆H*)/Φ_PLA; ΔH, is the melting enthalpy calculated by integrating the melting peak in the DSC, second heating scan shown in Figure 4A; ∆H* = 93 J g⁻¹ is the melting enthalpy of a 100% crystalline PLA; and Φ_PLA, is the weight fraction of PLA, in the samples (Zhang et al., 2018).