Effect of Variation of Hard Segment Content and Graphene-Based Nanofiller Concentration on Morphological, Thermal, and Mechanical Properties of Polyurethane Nanocomposites

Table 5

Enthalpy of crystallization for PU nanocomposites (cooling scans).

Cooling scans
% nanofiller	PU20-GNP		PU20-RGO		PU40-GNP		PU40-RGO
	(J/g)	(J/g)	(J/g)	(J/g)	(J/g)	(J/g)	(J/g)	(J/g)
0.00	−7.5	—	−7.5	—	−10.3	0.0	−10.3	—
0.25	−5.9	—	−9.0	—	−8.1	−6.5	−8.0	—
0.50	−2.8	—	−4.6	—	−6.3	−6.3	−7.9	—
1.00	−1.6	—	−4.2	—	−5.2	−3.6	−5.2	—
2.00	−2.9	—	−3.3	−4.6	−11.7	−6.3	−12.5	—