Poly nitro-displacement reaction

An alternative route to the formation of poly(imide)s is the nitro-displace-ment reaction to form the Ultem series of polymers, first exploited by White et al. [11] at General Electric. These, and similar materials, have application in composite materials and as specialty thermoplastics. Compared to the amic acid route described above, the nitro-displacement reaction is highly controlled, and materials of high chemical regularity produced, as demonstrated by White et al. [11] in their solution-state NMR study of Ultem poly(imide)s. 

Scheme 2.3 Synthesis of poly(aryl ether)s from -CFg-subslituted dinitro monomer and bisphenols by -CF3-activated nitro displacement reaction. Taken from Ref. [44].

Kim et al. prepared poly(biphenylene oxide)s (PBPOl and PBP02) containing -CF3 groups from AB-type monomers [45] through nucleophilic nitro displacement reaction and investigated their properties. To investigate the feasibility of the polymerization, the model reaction was performed with... 

Scheme 2.17 Synthesis of hb poly(arylene ether)s from monomers containing nitro group (a) via selective and sequential S vjAr (preferential fluorine displacement followed by nitro displacement) reaction of As-and BC-type monomers (b) via nitro displacement reaction of A2C-type monomer. Taken from Ref. [76],...

S.K. Park, S.Y. Kim, Synthesis of poly(arylene ether ketone)s containing trifluoromethyl groups via nitro displacement reaction. Macromolecules 31 (10)(1998) 3385-3387. 

I.S. Chung, S.Y. Kim, Poly(arylene ether)s via nitro displacement reaction synthesis of poly(biphenylene oxide)s containing trifluoromethyl groups from AB type monomers. Macromolecules 33 (26)(2000) 9474-9476. 

I.S. Chung, S.Y Kim, Meta-activated nucleophilic aromatic substitution reaction poly(biphenylene oxide)s with trifluoromethyl pendent groups via nitro displacement, J. Am. Chem. Soc. 123 (44) (2001) 11071-11072. 

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