Sorption of n-alkanes in poly(vinyltrimethylsilane) studied by inverse gas chromatography

Thermodynamics of sorption in glassy poly(vinyltrimethylsilane)

“…Therefore, a single source of Bn values, namely the Berthelot equation,11 was used. We Retention diagrams for PVTMS: (1) bicyclohexyl; (2) toluene; (3) cyclohexane; (4) n-hexan-l-ol; (5) n-pentan-l-ol; (6) n-hexane; (7) n-heptane ((C) col 3, (O) col 6); (8) n-decane ((+) col 2, (X) col 6).…”

Investigation of Polymers by Inverse Gas Chromatography

“…The first example of such behavior was glassy poly(vinyltrimethylsilane). 50,51 Later, numerous polymers with large free volume demonstrated the same behavior: prevailing of bulk sorption mechanism of retention in glassy state, absence of Z-shaped retention diagrams for both solvents and nonsolvents. 52−57 Chemically, this group of polymers important as membrane materials includes glassy polymers with bulky side groups like Si(CH 3 ) 3 , amorphous glassy perfluorinated copolymers, polymers of inner microporosity (PIMs), and thermally rearranged polymers.…”

“…It is important that in such polymers bulk sorption prevails not only at high temperatures but also in the glassy state. The first example of such behavior was glassy poly­(vinyl­trimethyl­silane). , Later, numerous polymers with large free volume demonstrated the same behavior: prevailing of bulk sorption mechanism of retention in glassy state, absence of Z -shaped retention diagrams for both solvents and nonsolvents. − Chemically, this group of polymers important as membrane materials includes glassy polymers with bulky side groups like Si­(CH 3 ) 3 , amorphous glassy perfluorinated copolymers, polymers of inner microporosity (PIMs), and thermally rearranged polymers. Their fractional free volume (FFV) is greater than 20%; hence, according to the free volume model they are characterized by larger diffusion coefficients of various solutes.…”