Features of Hydrogen Bonds in Aromatic Polyamides Containing Benzimidazole Groups According to Ab Initio Quantum Chemical Calculations

Abronin, I. A.; Bandurkin, A. V.; Volkova, L. V.; Shablygin, M. V.

doi:10.1007/s10692-016-9696-3

Cited by 6 publications

(8 citation statements)

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“…3, the bonds of free N-H ($3405 cm À1 ) are reected in the wavenumbers of band 1 (center: $3415 cm À1 ). 16,29,30 Band 2 (center: $3350 cm À1 ) mainly corresponds to N-H groups participating in hydrogen bonding interactions in amide groups. 16,29,30 The wavenumber of bond 3 (center: $3200 cm À1 ) represents hydrogen bonded N-H ($3145 cm À1 ) stretching in polybenzimidazole, respectively.…”

Section: Chemical Structurementioning

confidence: 99%

“…16,29,30 Band 2 (center: $3350 cm À1 ) mainly corresponds to N-H groups participating in hydrogen bonding interactions in amide groups. 16,29,30 The wavenumber of bond 3 (center: $3200 cm À1 ) represents hydrogen bonded N-H ($3145 cm À1 ) stretching in polybenzimidazole, respectively. 16,29,30 The center of band 3 is lower than that of band 2; therefore, band 3 can be attributed to stronger hydrogen bond stretching of the N-H groups.…”

Section: Chemical Structurementioning

confidence: 99%

“…16,29,30 The wavenumber of bond 3 (center: $3200 cm À1 ) represents hydrogen bonded N-H ($3145 cm À1 ) stretching in polybenzimidazole, respectively. 16,29,30 The center of band 3 is lower than that of band 2; therefore, band 3 can be attributed to stronger hydrogen bond stretching of the N-H groups. 16 Based on the above analysis, the percentages of the free N-H, hydrogen-bonded N-H and stronger hydrogen-bonded N-H can be calculated by the relative areas of band 1, band 2 and band 3.…”

Section: Chemical Structurementioning

confidence: 99%

“…[16][17][18][19][20][21][22][23][24][25][26][27][28][29] For example, Longbo Luo et al 16 comparatively studied the introduction of asymmetric heterocyclic units into PPTA and their effects on its microstructure, interactions and properties. K. Li et al [27][28][29] studied the mechanical properties, UV stability and the structure and property evolution during the decomplexation of hydrogen chloride from co-PPTA bers in detail. However, current research focuses on the relationship between the structure and properties of modied PPTA bers and the inuence of the third monomer, such as BIA and 3,4 0 -ODA, on the structure and properties of the PPTA bers.…”

Section: Introductionmentioning

confidence: 99%

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The introduction of benzimidazole and ether moieties into poly(p-phenylene terephthalamide): effects on its microstructure, interactions and properties

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Section: Chemical Structurementioning

confidence: 99%

Section: Chemical Structurementioning

confidence: 99%

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confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The introduction of benzimidazole and ether moieties into poly(p-phenylene terephthalamide): effects on its microstructure, interactions and properties

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“…Using this procedure, tensile strength increases up to 15% respect to fibers produced using one-step drawn. Finally, Abronin et al [ 62 ] showed a theoretical modelling of the analysis of the influence of hydrogen bonds in aromatic polyamides on technological processing methods to produce heavy-duty aramid yarns. Quantum-chemical calculations of model fragments in conjunction with vibrational spectra in the infrared range have shown that, depending on the hydrogen bonds between the benzimidazole groups, “self-orientation” processes emerged caused by the increase in energy of the hydrogen bonds in the aramid yarns and fibers.…”

Section: Aromatic Polyamides With Selected Properties and Applicatmentioning

confidence: 99%

Functional Aromatic Polyamides

et al. 2017

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Abstract:We describe herein the state of the art following the last 8 years of research into aromatic polyamides, wholly aromatic polyamides or aramids. These polymers belong to the family of high performance materials because of their exceptional thermal and mechanical behavior. Commercially, they have been transformed into fibers mainly for production of advanced composites, paper, and cut and fire protective garments. Huge research efforts have been carried out to take advantage of the mentioned characteristics in advanced fields related to transport applications, optically active materials, electroactive materials, smart materials, or materials with even better mechanical and thermal behavior.

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High‐performance heterocyclic para‐aramid aerogels for selective dye adsorption and thermal insulation applications

Song

et al. 2022

J of Applied Polymer Sci

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The high-performance polymer para-aramid (PPTA) is discovered to gel too soon during the polymerization process, resulting in poor processing performance. In this work, a homogeneous polymer solution containing heterocyclic para-aramid (HPPTA) was successfully synthesized by introducing 2,4-aminophenyl-5-aminobenzimidazole groups into the molecular chains of PPTA, and then HPPTA aerogel was prepared using a supercritical drying technique that took advantage of the HPPTA solution's excellent property of slow gelation. When the HPPTA polymer mass fraction was 1 wt%, the aerogel had the lowest density of 0.086 g cm À3 with a BET specific surface area of 376.59 m 2 g À1 . The HPPTA-2 aerogel had better adsorption performance for anionic dye methyl orange, with a maximum adsorption capacity of 319.47 mol g À1 ; however, its adsorption capacity for cationic dye methylene blue and neutral dye dimethyl yellow was very low, at only 19.68 and 0 mol g À1 , respectively. The selective adsorption ability of HPPTA aerogel made it a simple and scalable platform for removing anionic dyes from water solutions. Furthermore, the HPPTA aerogel has outstanding thermal properties for thermal insulation applications in severe environments due to the synergistic effect of the 3D porous structure inside the aerogel and the exceptional thermal stability of the HPPTA.

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Features of Hydrogen Bonds in Aromatic Polyamides Containing Benzimidazole Groups According to Ab Initio Quantum Chemical Calculations

Cited by 6 publications

References 0 publications

The introduction of benzimidazole and ether moieties into poly(p-phenylene terephthalamide): effects on its microstructure, interactions and properties

The introduction of benzimidazole and ether moieties into poly(p-phenylene terephthalamide): effects on its microstructure, interactions and properties

Functional Aromatic Polyamides

High‐performance heterocyclic para‐aramid aerogels for selective dye adsorption and thermal insulation applications

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