Crosslinkable polymers comprise recurring units represented by: wherein R, R′, and R″ are independently hydrogen or an alkyl, cyano, or halo group; R1 is hydrogen or a halo, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, cyano, hydroxy, alkoxy, carboxy, or ester group; L is an organic linking group; EWG represents an electron withdrawing group having a Hammett-sigma value greater than or equal to 0.35 such that the oxygen-carbon bond in O—C(EWG)(R1) is cleavable in the presence of a cleaving acid having a pKa of 2 or less as measured in water; Ar is a substituted or unsubstituted arylene group; X is NR2 or oxygen; R2 is hydrogen or an alkyl group; t-alkyl represents a tertiary alkyl group having 4 to 6 carbon atoms, and m represents at least 1 mol % and up to and including 100 mol %, based on the total recurring units in the polymer.