Poly(arylene ethers) with pendant crosslinkable groups, and devices incorporating same

A composition made by a process comprising a) providing a precursor composition comprising a polymer and b) crosslinking the polymer, wherein:

• the polymer comprises units having the formula
• wherein:
• Q1 comprises at least one aryl or heteroaryl group;
• Q2 comprises at least one aryl or heteroaryl group;
• X1 is O bonded directly to an aryl carbon of Q1;
• X2 is O bonded directly to an aryl carbon of Q2;
• Z is a linker comprising at least one —(C(R2)2)— group;
• Y is a single bond or a linker group;
• R1 is independently at each occurrence H, a halogen, an alkyl group, a heteroalkyl group, an aryl group, or a heteroaryl group;
• R2 is independently at each occurrence H, an alkyl group, or a heteroalkyl group;
• and
• R3 is H or a crosslinkable group.