Oxidative Polymerization of N-Phenylanthranilic Acid in the Heterophase System

Abstract

Polymers of N-phenylanthranilic acid were obtained by oxidative polymerization in the heterophase system in the presence of chloroform. Effect of synthesis conditions on the chemical structure of the polymers was studied. It was found that the growth of polymeric chain occurs via C-C joining into 2-and 4-positions of phenyl rings with respect to nitrogen. Thermal stability of poly-N-phenylanthranilic acid was studied.

Hybrid Electromagnetic Nanomaterials Based on Polydiphenylamine-2-carboxylic Acid

“…Synthesis methods were developed to prepare polymer–metal–carbon nanocomposites based on polydiphenylamine-2-carboxylic acid (PDPAC) first synthesized by the authors [ 44 , 46 ], single-walled carbon nanotubes (SWCNT), and magnetite nanoparticles (Fe 3 O 4 ). Hybrid Fe 3 O 4 /SWCNT/PDPAC nanomaterials were synthesized via in situ oxidative polymerization of diphenylamine-2-carboxylic acid (DPAC) in an acidic medium and in the interfacial process in an alkaline medium.…”

“…For comparison, polymers of diphenylamine-2-carboxylic acid were synthesized under the same conditions: in a NH 4 OH solution in the presence of chloroform (PDPAC-1) and in 5 M H 2 SO 4 (PDPAC-2). According to the GPC, the molecular mass of PDPAC-1 reached M w = 2.6 × 10 4 , the degree of polymerization was more than 120, and the polydispersity index was 2.2 [ 44 ]. The PDPAC-2 molecular mass achieved M w = 1.1 × 10 4 , the polymerization degree was above 50, and the index of polydispersity was 2.0 [ 46 ].…”

“…As seen in Figure 10 , both in the PDPAC-1 and PDPAC-2 polymers, the weight loss at ~170 °C is connected with the removal of COOH groups [ 52 ]. In this temperature range, the DSC thermograms of polymers have an exothermic peak associated with decomposition [ 44 , 46 ]. The absence of weight loss in the Fe 3 O 4 /SWCNT/PDPAC nanomaterials in this temperature range is explained by the fact that the carboxylate groups of the polymer interact with either the Fe 3 O 4 nanoparticles or the aromatic structures of SWCNT, depending on the method of nanocomposites preparation.…”

“…Nanocomposites based on PDPAC, SWCNT, and magnetite nanoparticles obtained in an alkaline medium were marked as Fe 3 O 4 /SWCNT/PDPAC-1. PDPAC was synthesized under the same conditions [ 44 ] to compare the structure and properties of nanocomposites and polymer, and marked as PDPAC-1.…”

Formation Features of Hybrid Nanocomposites Based on Polydiphenylamine-2-Carboxylic Acid and Single-Walled Carbon Nanotubes

“…Due to this, a greater amount of polymer formed on the CNT surface, forming the core-shell structure [46]. PDPAC is a novel conjugated polyacid synthesized by the authors [49,50,51], which is the N-substituted polyaniline containing an aromatic substituent with a carboxyl group in the orto position. The presence of the functional group can be expected to determine the electronic interaction between CNTs and the polymer not only through the main polymer chain but also through side substitutes.…”