Cross-linkable oligoimides, and processes of making and using same

A cross-linkable oligoimide having Structure 1 or Structure 2 below:

• wherein:
• a) each Z is independently O, CH2, or C═O;
• b) at least two of R1, R2, R3, and R4 are phenylethynyl, with a remainder of R1, R2, R3, R4, each being H;
• c) each Y is independently selected from one of the following moieties,
• wherein each L is independently a divalent linker selected from one of the following moieties:
• O, C═O, SO2, C(CF3)2, C(CF3)Ph, and —O-(pC6H4)—C(CF3)2-(pC6H4)—O—;
• d) n is an integer from about 3 to about 200;
• e) each X is independently:
• —H, —C≡CH,
• wherein:
• a) each Z is independently O, CH2, or C═O;
• b) R1, and R3 are each independently H or phenylethynyl;
• c) R2, and R4 are each phenylethynyl;
• d) each Y is independently selected from one of the following moieties,
• wherein L is independently a divalent linker selected from one of the following moieties:
• O, C═O, SO2, C(CF3)2, C(CF3)Ph, and —O-(pC6H4)—C(CF3)2-(pC6H4)—O;
• e) each Ar moiety is independently
• f) m is greater than zero but less than 1.00;
• g) n is an integer from about 3 to about 200;
• h) each X is independently —H, —C≡CH,