The Solubility of Hydrocarbon Gases in Glassy Polymers: Fractal Modeling

Table 2

Comparison of calculated (𝑆_cal) and experimental (𝑆_exp) values of solubility coefficient of hydrocarbon gases in PVTMS.

Hydrocarbon	𝑑ef, Å, from (6)	𝑆exp×10^−3a [11]	𝑆cal×10^−3a, from (6)
CH4	3.30	10	15
C2H6	4.06	70	109
C3H8	4.76	400	421
C4H10	5.66	1660	1766
C2H4	3.82	47	63
C3H6	4.63	310	332
C4H8	5.36	—	1163
C2H2	3.70	33	49
C3H4 (m)^b	4.62	300	357
C4H6 (e)^c	5.26	—	1022
C3H4 (a)^d	5.38	315	403
C4H6 (b)^e	5.45	—	981

aUnits of 𝑆: cm³ of gas (STP)/(cm³ of polymer cmHg).
^bm is methylacetylene.
^ce is ethylacetylene.
^da is allene.
^eb is butane.