
346 HIGH PERFORMANCE POLYMERS
1,3-Bis(2,3-dicarboxyl-phenoxy)benzene dianhydride
Pyromellitic dianhydride
O
O
O
O
O
O
3,3′,4,4′-Biphenyl dianhydride
O
O
OO
O
O
3,3′,4,4′-Benzophenone dianhydride
O
O
O
O
O
O
O
3,3′,4,4′-Oxydiphthalic anhydride
O
O
O
O
O
O
O
OO
OO
O
OO
O
1,4-Bis(3,4-dicarboxyl-phenoxy)benzene dianhydride
OO
O
O
O
O
O
O
4,4′-Bis(3,4-dicarboxyl phenoxyphenyl)-isopropylidene dianhydride
C
CH
3
CH
3
O
O
O
O
O
O
O
O
Figure 15.1 Dianhydride compounds used for poly
(imide)s.
O
O
O
4-(Phenylethynyl)-1,2-benzenedicarboxylic acid anhydride
O
O
O
H
3
C
Citraconic anhydride
O
O
O
Nadic anhydride
Figure 15.2 Modifiers for poly(imide)s.
with diphenylmethane diisocyanate using N,N-
dimethylformamide (DMF) as a solvent ...