Table 2.

Material properties of the inner layer (Aqualene) and the outer layer (Polyethylene) [29], [30]].

Material properties	Polyethylene	Aqualene
Density (g/cm3)	0.96	0.92
Coefficient of thermal expansion (c−1)	2.4 × 10−4	3 × 10−3
Reference temperature (°C)	22	22
Poisson’s ratio	0.4	0.34