Diffusion Coefficients of n-Alkanes and 1-Alcohols in Polyethylene Naphthalate (PEN)

Table 4

Activation energies of diffusion and the preexponential factor derived from diffusion coefficients from Table 2.

Substance	Temperature range (°C)	Activation energy (kJ/mol)	Preexponential factor (cm^2/s)
Methane	100-130	7.9	7.8 10^-9
Ethane	100-130	59.1	2.5 10^-2
n-Propane	100-130	103.4	3.2 10^3
n-Butane	100-130	120.8	1.9 10^5
n-Pentane	120-140	123.5	1.7 10^5
n-Hexane	120-140	149.0	1.9 10^8
n-Heptane	125-140	177.1	4.7 10^11
n-Octane	125-140	207.5	2.2 10^15
1-Propanol	120-140	94.5	8.9 10^1
1-Butanol	125-140	106.3	1.3 10^3
1-Pentanol	125-140	125.0	1.8 10^5
1-Hexanol	125-140	157.1	1.4 10^9
1-Heptanol	125-140	206.3	1.7 10^15