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

Table 4

Glass transition temperatures for PU and nanocomposite materials.

Materials	Glass transition temperature/ (°C)
Nanofiller (%)	0	0.25	0.5	1	2
PU20	−46	—	—	—	—
PU40	−42	—	—	—	—
PU20-GNP	—	−50	−46	−45	−42
PU40-GNP	—	−45	−51	−44	−46
PU20-RGO	—	−51	−46	−45	−52
PU40-RGO	—	−45	−45	−43	−48

Calculated from maximum of loss tangent (tanδ).