Photocurable polymers, photocurable polymer compositions and lithographic processes including the same

A poly(aryl ethersulfone) (PAES) polymer comprising:

• recurring units (RPAES) of formula (L):
• at least one terminal group of formula (M):
• wherein:
• each R1 is independently selected from the group consisting of a halogen, alkyl, alkenyl, alkynyl, aryl, ether, thioether, carboxylic acid, ester, amide, imide, alkali or alkaline earth metal sulfonate, alkyl sulfonate, alkali or alkaline earth metal phosphonate, alkyl phosphonate, amine and quaternary ammonium;
• each L1 is —(CH2)n—CH2—CH═CH2 or a radical containing the same;
• each i is an independently selected integer from 0 to 4;
• n is an integer from 1 to 10;
• T is selected from the group consisting of a bond, —CH2—;
• —O—;
• —SO2—;
• —S—;
• —C(O)—;
• —C(CH3)2—;
• —C(CF3)2—;
• —C(═CCl2)—;
• —C(CH3)(CH2CH2COOH)—;
• —N═N—;
• —RaC═CRb—, where each Ra and Rb, independently of one another, is a hydrogen or a C1-C12-alkyl, C1-C12-alkoxy, or C6-C18-aryl group;
• —(CH2)m— and —(CF2)m— with m being an integer from 1 to 6;
• an aliphatic divalent group, linear or branched, of up to 6 carbon atoms;
• and combinations thereof.