Polyimide oligomers and blends and method of curing

A crosslinkable polyimide oligomer having the general formula:

• ##STR48## wherein E is the residue of an imidophenylamine end cap having the general formula:
• ##STR49## wherein A is selected from the group consisting of:
• ##STR50## wherein Me=Methyl;
• G=--O--, --SO.sub.2 --, --CH.sub.2 --, or --S--;
• T=allyl or methallyl;
• R.sub.1 =lower alkoxy, aryl, substituted aryl, lower alkyl, substituted alkyl, aryloxy, or halogen;
• i=2;
• and
• j=0, 1 or 2;
• D is the residue of a dianhydride having the general formula:
• ##STR51## wherein Ar=an aromatic radical, and
• p=a small integer greater than or equal to 1;
• and
• B is the residue of a diamine having terminal groups and selected from the group consisting of lower alkylene diamines and polyaryl diamines having the general formula:
• ##STR52## wherein Ar=an aromatic radical;
• L.sub.1 =a linkage selected from the group consisting of -SO.sub.2 --, --S--, --CO--, --(CF.sub.3).sub.2 C--, and --(CH.sub.3).sub.2 C--;
• L.sub.2 =a linkage selected from the group consisting of --SO.sub.2 --, --O--, --S--, and --CH.sub.2 --;
• m=a small integer greater than or equal to 1;
• and
• n=a small integer greater than or equal to 1.

A multidimensional, crosslinkable, polyimide oligomer having the general formula:

• ##STR54## wherein Ar.sub.d =an aromatic moiety;
• and
• w=2, 3 or 4;
• D is the residue of a dianhydride having the general formula:
• ##STR55## wherein Ar=an aromatic radical, and p=a small integer greater than or equal to 1;
• and
• E is the residue of an imidophenylamine end cap having the general formula:
• ##STR56## wherein A is selected from the group consisting of:
• ##STR57## wherein Me=Methyl;
• G=--O--, --SO.sub.2 --, --CH.sub.2 --, or --S--;
• T=allyl or methallyl;
• R.sub.1 =lower alkoxy, aryl, substituted aryl, lower alkyl, substituted alkyl, aryloxy, or halogen;
• i=2;
• and
• j=0, 1 or 2;