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

Table 1

Substances used for permeation testing, their molecular weights and volumes, and the upstream concentrations used in permeation testing.

Substance	Molecular weight	Molecular volume [8]	Upstream concentration (mg/l)
	(g/mol)	(Å^3)	140°C	135°C	130°C	125°C	120°C	110°C	100°C
Methane	16.0	28.6			35.5		35.5	35.5	35.5
Ethane	30.1	45.8			32.6		32.6	32.6	32.6
Propane	44.1	62.6			19.3		19.3	19.3	19.3
n-Butane	58.1	79.4			12.9		12.9	12.9	12.9
n-Pentane	72.2	96.2	262	226	194	161	137
n-Hexane	86.2	113	138	119	102	85.1	72.3
n-Heptane	100	130	71.6	61.7	52.8	44.0	37.4
n-Octane	114	147	36.8	31.7	27.1	22.6	19.2
n-Nonane	128	163	22.5	19.4	16.6	13.9	11.8
n-Decane	142	180	11.5	9.87	8.46	7.05	6.00
n-Undecane	156	197	6.20	5.34	4.58	3.81	3.24
n-Dodecane	170	214	3.14	2.70	2.32	1.93	1.64
n-Tridecane	184	231	1.58	1.36	1.17	0.974	0.828
n-Tetradecane	198	247	0.800	0.688	0.590	0.491	0.418
1-Propanol	60.1	70.8	118	101	84.1	70.0	56.0
1-Butanol	74.1	87.6	59.3	50.8	42.4	35.3	28.25
1-Pentanol	88.2	104	23.9	20.4	17.0	14.2	11.4
1-Hexanol	102	121	11.9	10.2	8.51	7.09	5.68
1-Heptanol	116	138	6.00	5.14	4.28	3.57	2.86
1-Octanol	130	155	2.43	2.08	1.74	1.45	1.16