Synthesis and characterization of new aromatic poly(amide–imide)s based on 4‐aryl‐2,6‐bis(4‐trimellitimidophenyl) pyridines

Abstract

New diimide–dicarboxylic acids, ie 4‐phenyl‐2,6‐bis(4‐trimellitimidophenyl)pyridine and 4‐p‐biphenyl‐2,6‐bis‐(4‐trimellitimidophenyl)pyridine, were synthesized by the condensation reaction of 4‐phenyl‐2,6‐bis(4‐aminophenyl)pyridine and 4‐p‐biphenyl‐2,6‐bis(4‐aminophenyl)pyridine with trimellitic anhydride in glacial acetic acid or dimethylformamide. The monomers were fully characterized by FT‐IR and NMR spectroscopies, and elemental analyses. A series of novel poly(amide–imide)s with inherent viscosities of 0.68–0.87 dl g−1 was prepared from the two diimide–diacids with various aromatic diamines by direct polycondensation. The poly(amide–imide)s were characterized by FT‐IR and NMR spectroscopies. The λmax data for the resulting poly(amide–imide)s were in the range of 260–292 nm. These polymers exhibited good solubilities in polar aprotic solvents. The 10 % weight loss temperatures are above 485 °C under a nitrogen atmosphere. Copyright © 2004 Society of Chemical Industry

Preparation of soluble polysilsesquioxane containing phthalimido side-chain groups and its optical and thermal properties

“…Conversely, some polymers containing imido side-chain groups that are thermally stable, e.g., phthalimido groups, show high thermal stability, solubility, and processability. For example, polyamides [3,4], polyesters [5], poly(amide-imide)s [6,7], poly(benzimidazole-amide)s [8], poly(ester-imide)s [9], poly(urethane-imide)s [10], and polynorbornenes [11] bearing phthalimido pendent groups indicated excellent thermal properties while maintaining solubility. Thus, most of the polymers bearing phthalimido side-chain groups possess organic main-chains.…”

“…29 Si NMR spectrum of PSQ-PI in DMSO-d6 . Chemical shifts were referenced to TMS (d 0.0) as an external standard.…”

Effects of Dimaine, Diacid and Dintitro Derivatives on the Inhibition of Adenosine Deaminase; Experimental, Molecular Docking and QSAR Studies

“…Biphenyl-based diamine diacids (DAC1 and DAC2) synthesized same as literature, 22 Imide containing aromatic diacid (DAC3) pyridine-based fully aromatic dinitro compounds (DN1, DN2) were synthesized as literature. 23 The name, abbreviation and the structure of cited ligands were shown in Scheme 1. All of the other reagents were obtained from Merck chemical company.…”

Prediction of Thermal Decomposition Temperature of Polymers Using QSPR Methods

“…The reported experimental data have been taken from Refs. [15][16][17][18][19][20][21][22][23][24][25]. The Thermal stability evaluation of the resulting polymers was carried out by TGA/DTG in nitrogen at a heating rate of 10 °C/min.…”