New fluorinated aromatic poly(ether-amide)s derived from 2,2′-bis(3,4,5-trifluorophenyl)-4,4′-diaminodiphenyl ether and various dicarboxylic acids

Novel para-linked and CF3-substituted poly(amide-ether-imidazole)s: Solubility, optical and thermal properties

“…The data from thermal analysis show that the resulting polymers have fairly high thermal stability. This explains that introduction of strong electron negativity of -CF 3 groups might have enhanced the polarity of the polymer, which should restrict the movement of polymer-link and led to better thermal stability than previously reported polyamides [3,34].…”

“…Many novel diamine or diacid monomers have been specially designed using different approaches, such as incorporation of flexible or bridging functional groups [3][4][5][6], bulky pendant groups [7][8][9][10][11], cardo groups [12][13][14], heterocyclic rings [15,16] and meta-or ortho-catenated as a less symmetric aromatic units [17][18][19] to afford the success in preparation of organosoluble polyamides. Recently, considerable attention has been devoted to the synthesis of fluorine containing polymers.…”

Fluorinated Polyamides

“…Behniafar and Sedaghatdoost prepared a new class of highly fluorinated aromatic poly(ether-amide)s by reacting 2,2′-bis(3,4,5-trifluorophenyl)-4,4′-diaminodiphenyl ether with different dicarboxylic acids by the phosphorylation method (Figure 4.14) [19]. These highly fluorinated PAs showed a significant enhancement in solubility, thermal stability, and T g values in comparison to their nonfluorinated counterparts.…”

“…This is attributed to their decomposition temperature being below their melt temperature [1]. It is reported in the literature that the presence of bulky hexafluoroisopropylidene [-C(CF 3 ) 2 ] or trifluoromethyl (-CF 3 ) groups in the polyamide structure endows remarkable improvements in several properties compared to nonfluorinated polyamides [12][13][14][15][16][17][18][19][20][21][22][23][24][25]. The solubility of a less rigid and less linear structure like PMPI is higher due to the concomitant reduction in cohesive energy and crystallization tendency compared to PPPT.…”

Novel ortho‐linked fluorinated poly(ether‐imide)s based on 2,2′‐substituted 1,1′‐binaphthyl units

“…Alongside our recent studies related to the synthesis of high‐performance fluorinated polyamides, polyimides, and poly(amide‐imide)s, this work deals with the preparation of a series of new fluorinated poly(ether‐imide)s derived from structurally well‐designed diamine 2,2′‐bis(2‐amino‐4‐trifluoromethylphenoxy)‐1,1′‐binaphthyl (AFPBN) and a number of tetracarboxylic dianhydride comonomers by using a two‐stage process with chemical imidization method. Optical and thermal behaviors of the obtained polymers as well as their solubility in common organic solvents are fully investigated.…”