Isomeric poly(ether imide)s: synthesis, thermal properties and permeabilities

A comparison of poly(ether imide)s from diamines with 2-aminophenoxy or 4-aminophenoxy units: Synthesis, characterization and properties

“…13 opo(NH 2 ) 2 : 1 H NMR; d (ppm) 3.80 (2H, amine),6.93 (s, 4H, H(2, 3, 5, 6) (6.69)), 6.95 (m, 1H, H(4 0 ), (6.57)), 6.69 (m, 1H, H(5 0 ) (6.52)), 6.81, 6.83 (m, 2H H(3 0 , 6 0 )). 13 o3Meoo(NO 2 ) 2 : 1 H NMR; d (ppm) 7.1 (m, 2H H(5, 6) (6.61, 6.47)), 7.2 (m, 1H H(4) (6.53)), 7.9 (m, 2H H(3 0 , 3 00 ) (8.12)), 6.57, 6.9 (m, 2H H(4 0 , 4 00 ) (7.08), 7.4-7.5 (m, 2H H(5 0 , 5 00 ) (6.57)), 7.0-7.2 (m, 2H H(6 0 , 6 00 ) (7.04)).…”

“…These studies primarily involved poly(ether imide)s with ether linkages incorporated into the dianhydride moieties [2][3][4][5][6][7]. We contributed to these studies, synthesizing new bis(ether anhydride)s with aromatic [8][9][10][11][12][13][14], or aliphatic [15], units of different structure and substitution patterns.…”

Molecular and supramolecular approaches for tuning properties of new polyketanils

“…This phenomenon was also observed for polyketanils prepared from pdibenzoylbenzene or trans-1,2-dibenzoylethylene and different diamines [33,44] and for polyimides synthesized from diamines with a methyl group at ortho position to the amine group [45,46]. The explanation of this behaviour may be a hindered rotation caused by the presence of the substituents, which affects the polymer chain to be stiffer.…”

Synthesis and thermal properties of poly(urethane‐imide)

“…An effective approach for improving solubility and processability that has been successfully applied is the introduction of flexible linkages, which come from either the diamine or the dianhydride component into the polyimide main chain. The flexible linkages include ether (OOO), sulfur (OSO), sulfone (OSO 2 O), and isopropylidene [OC(CH 3 ) 2 O], as well as hexafluoroisopropylidene [OC(CF 3 ) 2 O]. [1][2][3][4][5] Another approach is the synthesis of copolyimides such as poly(amide-imide) and poly(ester-imide).…”

“…The flexible linkages include ether (OOO), sulfur (OSO), sulfone (OSO 2 O), and isopropylidene [OC(CH 3 ) 2 O], as well as hexafluoroisopropylidene [OC(CF 3 ) 2 O]. [1][2][3][4][5] Another approach is the synthesis of copolyimides such as poly(amide-imide) and poly(ester-imide). 6,7 Our preliminary research on thermoset poly-(urethane-imide) (PUI) has proven that bismaleimide with urethane linkages (BMIU) prepared from Diels-Alder reactions of bisfuranylmethylcarbamate and 4,4Ј-(bismaleimidodiphenyl) methane (BMI) is an effective modifying agent of the toughness of BMI.…”