Material

$c_1\left(\text{MPa}\right)$

$c_2\left(\text{MPa}\right)$

$c_3\left(\text{MPa}\right)$

$c_4$

${\alpha }_0\left(1/\text{K}\right)$

SR Rubber

0.2230

−0.0146

2.97 × 10⁻⁶

2.1427

−0.0029

NR-C60 Rubber

0.5583

1.1284

2.48 × 10⁻⁵

1.5778

0.0095