Study on Thermal and Flame Retardant Properties of Phosphorus-containing Polyimides

Serbezeanu, Diana; Vlad‐Bubulac, Tăchiță; Hamciuc, Elena; Hamciuc, Corneliu; Lisă, Gabriela; Anghel, Ion; Şofran, Ioana-Emilia; Preda, Dana-Maria

doi:10.37358/rc.21.4.8452

Cited by 7 publications

(11 citation statements)

References 20 publications

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“…2DOPO-NH 2 was synthesized according to previously published procedures starting from 4,4’-diaminobenzophenone and 9,10-dihydro-9-oxa-10-phosphaphenanthrene- 10-oxide [ 24 , 25 , 27 ].…”

Section: Methodsmentioning

confidence: 99%

“…The preparation of the PI(1–4) polyimides studied in the current work has been described in detail in our previously published paper [ 27 ]. Nevertheless, in the present work, the PI(1–4) have been prepared via casting from solutions technique followed by the thermal imidization in film state instead of thermal imidization in solution.…”

Section: Methodsmentioning

confidence: 99%

“…Basic characterization data regarding thermal properties and combustion behavior of the polyimides under study, including limiting oxygen index (LOI, 39.1%), carbonaceous residue yield measured at 600 °C (60–70%), carbonaceous residue yield measured at 900 °C (35–54%), heat release capacity (HRC, 109.37–165.28 J/g * K), and total heat release THR (8.14–11.30, kJ/g), were performed in our previous work [ 27 ].…”

Section: Methodsmentioning

confidence: 99%

“…In our previous studies, thermal and flame-retardant properties of a series of phosphorus-containing polyimide powders were introspected by means of thermogravimetric analysis (TGA) and pyrolysis combustion flow calorimetry (PCFC), while Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were applied to establish that their remarkable char yields at 900 °C, ranging from 35% to 54%, play an important role in the degradation mechanism of these polyimides [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

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Optical and Flame-Retardant Properties of a Series of Polyimides Containing Side Chained Bulky Phosphaphenanthrene Units

Homocianu¹,

Serbezeanu²,

Lisă

et al. 2022

IJMS

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Among the multitude of polymers with carbon-based macromolecular architectures that easily ignite in certain applications where short circuits may occur, polyimide has evolved as a class of polymers with high thermal stability while exhibiting intrinsic flame retardancy at elevated temperatures via a char-forming mechanism. However, high amounts of aromatic rings in the macromolecular backbone are required for these results, which may affect other properties such as film-forming capacity or mechanical properties; thus, much work has been done to structurally derivatize or make hybrid polyimide systems. In this respect, flexible polyimide films (PI(1–4)) containing bulky 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) units have been developed starting from commercial dianhydrides and an aromatic diamine containing two side chain bulky DOPO groups. The chemical structure of PI(1–4)) was characterized by 1H NMR, 13C NMR and 31P NMR spectroscopy. The optical properties, including absorption and luminescence spectra of these polymers, were analyzed. All polyimides containing DOPO derivatives emitted blue light with an emission maxima in the range of 340–445 nm, in solvents such as N,N-dimethylformamide, N-methyl-2-pyrrolidone, chloroform, and N,N-dimethylacetamide, while green light emission (λem = 487 nm for PI-4) was evidenced in a thin-film state. The thermal decomposition mechanism and flame-retardant behavior of the resulting materials were investigated by pyrolysis-gas-chromatography spectrometry (Py-GC), scanning electron microscopy (SEM), EDX maps and FTIR spectroscopy. The residues resulting from the TGA experiments were examined by SEM microscopy images and FTIR spectra to understand the pyrolysis mechanism.

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“…2DOPO-NH 2 was synthesized according to previously published procedures starting from 4,4’-diaminobenzophenone and 9,10-dihydro-9-oxa-10-phosphaphenanthrene- 10-oxide [ 24 , 25 , 27 ].…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optical and Flame-Retardant Properties of a Series of Polyimides Containing Side Chained Bulky Phosphaphenanthrene Units

Homocianu¹,

Serbezeanu²,

Lisă

et al. 2022

IJMS

Self Cite

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“…In the case of the PVA/OA-4, the T 5% is lower probably the presence of the high content of ze-Ag in the sample leads to the catalysis of this. The weight loss of the PFR-4 took place between 267 • C and 361 • C, corresponding to the release of small molecules and breakdown of the weak bonds such as P-O-C and P-C [40][41][42][43][44][45]. Also, from the TG curves it can be observed that the PFR-4 can reduce the T 5% of the PVA/OA-0 and promote the formation of the carbonaceous layers on the surface.…”

Section: Thermal Stabilitymentioning

confidence: 96%

Organophosphorus Reinforced Poly(vinyl alcohol) Nanocomposites Doped with Silver-Loaded Zeolite L Nanoparticles as Sustainable Materials for Packaging Applications

Vlad‐Bubulac¹,

Hamciuc²,

Serbezeanu³

et al. 2023

Polymers

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The sustainable development of innovative eco-friendly multifunctional nanocomposites, possessing superior characteristics, is a noteworthy topic. Novel semi-interpenetrated nanocomposite films based on poly(vinyl alcohol) covalently and thermally crosslinked with oxalic acid (OA), reinforced with a novel organophosphorus flame retardant (PFR-4) derived from co-polycondensation in solution reaction of equimolar amounts of co-monomers, namely, bis((6-oxido-6H-dibenz[c,e][1,2]oxaphosphorinyl)-(4-hydroxyaniline)-methylene)-1,4-phenylene, bisphenol S, and phenylphosphonic dichloride, in a molar ratio of 1:1:2, and additionally doped with silver-loaded zeolite L nanoparticles (ze-Ag), have been prepared by casting from solution technique. The morphology of the as prepared PVA-oxalic acid films and their semi-interpenetrated nanocomposites with PFR-4 and ze-Ag was investigated by scanning electron microscopy (SEM), while the homogeneous distribution of the organophosphorus compound and nanoparticles within the nanocomposite films has been introspected by means of energy dispersive X-ray spectroscopy (EDX). It was established that composites with a very low phosphorus content had noticeably improved flame retardancy. The peak of the heat release rate was reduced up to 55%, depending on the content of the flame-retardant additive and the doping ze-Ag nanoparticles introduced into the PVA/OA matrix. The ultimate tensile strength and elastic modulus increased significantly in the reinforced nanocomposites. Considerably increased antimicrobial activity was revealed in the case of the samples containing silver-loaded zeolite L nanoparticles.

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Novel bio-based phosphorous-containing UV-curable flame-retardant coatings

Ozman

Dizman²,

Bi̇rtane

et al. 2023

J Coat Technol Res

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Study on Thermal and Flame Retardant Properties of Phosphorus-containing Polyimides

Cited by 7 publications

References 20 publications

Optical and Flame-Retardant Properties of a Series of Polyimides Containing Side Chained Bulky Phosphaphenanthrene Units

Optical and Flame-Retardant Properties of a Series of Polyimides Containing Side Chained Bulky Phosphaphenanthrene Units

Organophosphorus Reinforced Poly(vinyl alcohol) Nanocomposites Doped with Silver-Loaded Zeolite L Nanoparticles as Sustainable Materials for Packaging Applications

Novel bio-based phosphorous-containing UV-curable flame-retardant coatings

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