The solubility of carbon dioxide, methane, and propane in poly(dimethyl silmethylene) [(CH 3 ) 2 SiCH 2 ] x and poly(tetramethyl silhexylene siloxane) [(CH 3 ) 2 Si (CH 2 ) 6 Si (CH 3 ) 2 O] x was measured in the temperature range from 10.0 to 55.0°C and at elevated pressures. The present results are compared with similar measurements made with other silicone polymers. At a given temperature and pressure, the solubility of the above three gases is highest in poly(dimethyl siloxane) (Me 2 SiO) x . The gas solubility is decreased by either backbone‐chain or side‐chain substitutions of functional groups in (Me 2 SiO) x which increase the stiffness of the polymer chains and decrease the specific or fractional free volume of the polymers. It is conjectured that a decrease in the free volume of silicone polymers has a greater effect in decreasing the gas solubility than differences in gas/polymer interactions [with the exception of specific interactions (e.g., between CO 2 and polar groups in the polymer)].
No takes yet. Share an insight, caveat, or question.
Shah et al. (1993) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: