TY - JOUR
T1 - Gas permeability of a new silicone ring polymer
T2 - Isotactic poly(phenyl silsesquioxane)
AU - Mi, Y.
AU - Stern, S. A.
PY - 1991/3/30
Y1 - 1991/3/30
N2 - The permeability of isotactic poly(phenyl silsesquioxane) (PPSQ) to O2 and N2 at 25.0°C and to CO2 and CH4 at 35.0°C was measured at low pressures by the “time‐lag” method. PPSQ is a glassy silicone polymer with an 8‐atom ring structure of alternating Si and O atoms. The CO2/CH4 selectivity of PPSQ is markedly higher than that of other silicone polymers, whereas its O2/N2 selectivity appears to be only slightly higher. PPSQ is not as effective a “molecular sieve” as would be expected from its ring structure, possibly because its relatively large mean interchain distance suggests that this polymer has a large mean free volume.
AB - The permeability of isotactic poly(phenyl silsesquioxane) (PPSQ) to O2 and N2 at 25.0°C and to CO2 and CH4 at 35.0°C was measured at low pressures by the “time‐lag” method. PPSQ is a glassy silicone polymer with an 8‐atom ring structure of alternating Si and O atoms. The CO2/CH4 selectivity of PPSQ is markedly higher than that of other silicone polymers, whereas its O2/N2 selectivity appears to be only slightly higher. PPSQ is not as effective a “molecular sieve” as would be expected from its ring structure, possibly because its relatively large mean interchain distance suggests that this polymer has a large mean free volume.
UR - https://www.webofscience.com/wos/woscc/full-record/WOS:A1991EY24800001
UR - https://openalex.org/W2055005889
UR - https://www.scopus.com/pages/publications/0026119689
U2 - 10.1002/polb.1991.090290401
DO - 10.1002/polb.1991.090290401
M3 - Journal Article
SN - 0887-6266
VL - 29
SP - 389
EP - 393
JO - Journal of Polymer Science, Part B: Polymer Physics
JF - Journal of Polymer Science, Part B: Polymer Physics
IS - 4
ER -