Study of the fire resistant behavior of unfilled and carbon nanofibers reinforced polybenzimidazole coating for structural applications

Iqbal, Hms; Stec, Anna A.; Patel, Parina; Bhowmik, Shantanu; Benedictus, Rinze

doi:10.1002/pat.3200

Cited by 13 publications

(13 citation statements)

References 24 publications

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“…The aromatic polybenzimidazoles (PBIs) are linear heterocyclic macromolecules that belong to the class of high performance polymers, they are resistant to acids and bases, have high glass transition temperatures, excellent thermal stability and mechanical stability . Such unique combination of the properties makes them very attractive for various potential applications such as different kinds of membranes, ultrafilters, electrochemical sensors, fire‐resistant materials, among other uses.…”

Section: Introductionmentioning

confidence: 99%

Processable N‐Substituted Polybenzimidazole; Direct Synthesis

et al. 2020

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In this work, the preparations of N‐phenyl substituted polybenzimidazoles by direct polycondensation between N‐phenyl substituted aromatic tetramine, 4,6‐di(N‐phenylamine)‐1,3‐diaminebenzene, and dicarboxylic acids in Eaton's reagent are reported. It is shown that the factors of concentration and temperature are very important for synthesis of soluble linear polymer structures. The high temperatures promote strong crosslinking reactions resulting in insoluble gel fraction. Only decreasing the reaction temperature to 90 °C it is possible to obtained soluble polymer of high molecular weights with inherent viscosity of 1.6 dL/g. Although the FTIR and 1H NMR analyses demonstrated incomplete cyclization of thus obtained polymers, but they are readily soluble in organic solvents and the good quality films were prepared by solution casting. In order to complete the cyclization films were undergone by thermal treatment at 320 °C during 1 h. The N‐phenyl substituted polybenzimidazoles demonstrated good thermal and mechanical properties, which were compared to their analog unsubstituted polybenzimidazoles obtained from 1,2,4,5‐Benzenetetramine tetra‐hydrochloride using similar synthetic conditions.

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Section: Introductionmentioning

confidence: 99%

Processable N‐Substituted Polybenzimidazole; Direct Synthesis

et al. 2020

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“…The initial weight loss is attributed to evaporation of moisture from PBI. 9 The thermal stability of 2.5% calcium silicate nanopowder-filled PBI film shows a stable behavior, up to a temperature of 500 C. When the percentage of calcium silicate increased to 7.5%, the thermal stability has been further increased to 590 C. This is the significance of using PBI as the coating material for increasing the thermal stability and fire resistivity of phenolic composite. 18 The high thermal stability of PBI is due to the presence of aromatic and heterocyclic rings in the backbone of the polymer chain.…”

Section: Thermogravimetric Analysismentioning

confidence: 97%

“…Due to atmospheric pressure plasma treatment on the phenolic composite surface, contact angle decreases significantly, which is a clear indication of the increase in wettability. The effect of air plasma treatment of carbon epoxy composite was studied by Ebla et al 9 and it was revealed that there was a decrease in contact angle from 72 to 17 . 9 The FTIR and AFM results reveal that there is a significant increase in hydrophilic functional groups and surface roughness on the plasma-treated surface.…”

Section: Limiting Oxygen Index Testmentioning

confidence: 99%

“…One such important contribution was coating of carbon nanofiber-reinforced PBI over the carbon/ epoxy composite in order to increase thermal stability and fire resistivity. 9 The studies have shown that there was an appreciable increase in fire resistance properties by employing sodium silicate as additive. Among different silicates, calcium silicate shows high thermal stability (1500 C) and excellent fire resistance property.…”

Section: Introductionmentioning

confidence: 99%

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High-performance fire-resistant polymeric nanocomposite for aerospace applications

George

Bhowmik

Abraham

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part L:

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This investigation essentially highlights development of novel high-performance fire-resistant polymeric nanocomposite with respect to its orientation towards future generation aviation. Therefore, an attempt has been made to increase thermal stability and fire resistivity of phenolic/cotton fabric reinforced polymer composite, which is desirable for aircraft interiors. There is considerable increase in adhesion characteristics of phenolic fabric reinforced polymer composite due to atmospheric pressure plasma treatment. The phenolic fabric reinforced polymer is subsequently coated with nanosized calcium silicate reinforced polybenzimidazole composite in order to increase thermal stability and fire resistance property. Thermogravimetric analysis reveals that polybenzimidazole-coated fabric reinforced polymer shows significantly better thermal stability than the uncoated phenolic fabric reinforced polymer. There is a significant increase in the limiting oxygen index characteristics of polybenzimidazole-coated fabric reinforced polymer when compared to the uncoated phenolic composite resulting in considerable improvement in fire resistivity of the polymers.

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“…Recently, there has been a lot of progress to increase the application of PBI. These applications include fiber, membranes, nano‐filtration and gas separation . Currently, commercial PBI is available in global markets as Celazole® and SCM 7000.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of high molecular weight polybenzimidazole using a highly pure monomer under mild conditions

et al. 2017

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An isophthalaldehyde bisulfite adduct (IBA) was synthesized using a reaction between sodium sulfite and isophthalaldehyde. Isophthalaldehyde monosulfite adduct (IMA) was inevitably synthesized during the reaction. Because IBA and IMA have similar solubility in water, it is difficult to separate them through a recrystallization process. In order to obtain pure IBA, an excess of sodium sulfite was used. Highly pure IBA was subsequently obtained without the need for recrystallization. The IBA was then used as the starting monomer for the synthesis of poly[2,2 ′ -(m-phenylene)-5,5 ′ -bisbenzimidazole] (PBI). Previous isolation methods for IBA hindered the synthesis of high molecular weight PBI. This new synthetic procedure produces high-purity IBA, which can be used to synthesize high molecular weight PBI.

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Study of the fire resistant behavior of unfilled and carbon nanofibers reinforced polybenzimidazole coating for structural applications

Cited by 13 publications

References 24 publications

Processable N‐Substituted Polybenzimidazole; Direct Synthesis

Processable N‐Substituted Polybenzimidazole; Direct Synthesis

High-performance fire-resistant polymeric nanocomposite for aerospace applications

Synthesis of high molecular weight polybenzimidazole using a highly pure monomer under mild conditions

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