Figure 4.

Thermal conductivity of PE-wax films with draw ratios of 30 and 70 as functions of Mn (A, B) and Mw (C, D). The red dashed lines are the curves fit using eq 4. When the draw ratio is 70 times, κ is close to κ₁ and κ₂ is ignored. The values of parameters in eq 4 are obtained based on the thermal conductivity at a draw ratio of 70. Thermal conductivity of PE-wax films with a draw ratio of 100 as functions of Mn and Mw was shown in Figure S7. The data of pure PE films are excluded due to their different morphology with PE-wax films.