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

Table 1

Phase transitions parameters for nonmodified PUs.

PU matrix	(°C)	(°C)	(J/g)	(°C)	(J/g)	(°C)	(J/g)
PU20	−41	25	13.5	212	5.5	111	−7.5
PU40	−46	25	12.0	190	9.1	119	−10.3

T_m: melting temperature; T_c: crystallization temperature; ∆H_m: enthalpy of melting; ∆H_c: enthalpy of crystallization.