High selectivity and high CO2 plasticization resistant polymeric membranes for gas separations

A polymer comprising a plurality of repeating units of formula (I)

• wherein Ar1 s selected from the group consisting of:
• and mixtures thereof,
• wherein Ar2 is selected from the group consisting of:
• and mixtures thereof;
• wherein X1 is a mixture of
• and optionally
• wherein R1-R36 are each independently hydrogen, a halogen, an alkyl group, an alkenyl group, an alkynyl group, or an aryl group, and wherein the alkyl group, the alkenyl group, the alkynyl group, or the aryl group is optionally substituted with a halogen;
• wherein the halogen is F, Cl, Br, or I;
• wherein A1, A2, and A3 are each independently O, S, or NH;
• wherein m is an integer from 5 to 5000;
• wherein n is an integer from 0 to 5000;
• wherein a molar ratio of n/m is in a range of 0:1 to 20:1;
• wherein p is 1, 2, 3 or 4;
• wherein q is 0, 1, 2, or 3;
• and
• wherein r, s, t, and o are independently 0, 1, 2, or 3,
• wherein R37, R38, R39 and R40 are each independently —H, —CH3, —CH2CH3, —CH(CH3)2, —C(CH3)3, —CH2—C6H5, or —CH2—CH(CH3)2;
• and
• wherein R41 is —CH3, —CH2CH3, or —C6H5.