Six-member polyimides incorporating redox chromophores

Damaceanu, Mariana‐Dana; Rusu, Radu‐Dan; Brumă, Maria

doi:10.1007/s10853-012-6542-8

Cited by 15 publications

(6 citation statements)

References 30 publications

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“…In addition, silarylene moieties, when introduced in aromatic polymers, lead to substantially improved solubility, while maintaining a high thermal stability, and thus facilitate the processing of the resulting polymers from their solutions by common casting or spin‐coating techniques. The silicon‐containing aromatic polymers have attracted even more scientific and technological interest because of their potential applications in the production of optoelectronic materials, such as photoresists, or of electroluminescent devices …”

Section: Introductionmentioning

confidence: 99%

Advanced materials based on new structurally designed poly(naphthylimide-amide)s

Constantin¹,

Damaceanu²,

Brumă³

et al. 2014

Polym. Int.

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This work reports the synthesis and characterization of novel six-membered poly(imide-amide)s based on a naphthalene-N,N ′ -bis(imido-amine) and various dicarboxylic acids containing flexible units such as ether, hexafluoroisopropylidene and diphenylsilane. A new design is proposed for aromatic poly(imide-amide)s, in which the imide and amide units are directly connected through a N-N bond. These highly thermostable polymers were successfully synthesized using Yamazaki-Higashi reaction conditions. The poly(imide-amide)s were processed into thin hydrophobic films having self-assembled micellar structures. The presence of aggregates in solutions with concentrations below 1% was evidenced and is discussed in relation to the chemical structure. The photoluminescence properties of polymer solutions and films showed their ability to produce white and blue light emission. The lowest unoccupied molecular orbital energy level was calculated using cyclic voltammetry data, showing good electron injection and transport characteristics. The properties of these polymers make them attractive for applications in advanced optoelectronics and related fields.

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Section: Introductionmentioning

confidence: 99%

Advanced materials based on new structurally designed poly(naphthylimide-amide)s

Constantin¹,

Damaceanu²,

Brumă³

et al. 2014

Polym. Int.

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“…When the aging experiments mimicked low earth orbit, space-flight conditions (temperatures between 10 and 300 K, ultra-high vacuum [10][11], and high concentration of electronically excited atoms [108 atoms•cmÀ 3 of atomic O]), the degradation proceeded through chain scission and generated H2, CO, and CO2 [163,164]. Similar experiments mimicking geostationary orbit conditions (involving high energy [90 keV] electrons) showed a board range of radiation-induced damage (breakage of chemical bonds and formation of new ones) and a strong effect on optical (lower transmittance) and charge transport (higher conductivity) features [165].…”

Section: Radiation Degradationmentioning

confidence: 99%

“…This outstanding collection of traits mainly comes from their highly symmetrical backbones, extreme structural rigidity, and intra-and inter-chain hydrogen bonding. However, these features also imply some intrinsic weaknesses such as poor solubility in organic media, low thermal coefficient, poor corona resistance, relatively high thermal expansivity and, very important from the industrial point of view, difficult and expensive processability, which therefore restrict some of their potential applications [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

New High-Performance Materials: Bio-Based, Eco-Friendly Polyimides

Rusu¹,

Abadie²

2021

Polyimide for Electronic and Electrical Engineering Applications

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The development of high-performance bio-based polyimides (PIs) seems a difficult task due to the incompatibility between petrochemical-derived, aromatic monomers and renewable, natural resources. Moreover, their production usually implies less eco-friendly experimental conditions, especially in terms of solvents and thermal conditions. In this chapter, we touch some of the most significant research endeavors that were devoted in the last decade to engineering naturally derived PI building blocks based on nontoxic, bio-renewable feedstocks. In most cases, the structural motifs of natural products are modified toward amine functionalities that are then used in classical or nonconventional methods for PI synthesis. We follow their evolution as viable alternatives to traditional starting compounds and prove they are able to generate eco-friendly PI materials that retain a combination of high-performance characteristics, or even bring some novel, enhanced features to the field. At the same time, serious progress has been made in the field of nonconventional synthetic and processing options for the development of PI-based materials. Greener experimental conditions such as ionic liquids, supercritical fluids, microwaves, and geothermal techniques represent feasible routes and reduce the negative environmental footprint of PIs' development. We also approach some insights regarding the sustainability, degradation, and recycling of PI-based materials.

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“…They are valued, amongst other properties, for their temperature resistance, dimensional stability, strength and chemical resistance in several demanding applications [1,2]. Thus, the high performance polymers have gained growing interests in aerospace, national defence and many industrial applications, such as electronics, medical or transportation [3][4][5][6][7][8]. Poly(ether-imide)s are derivatives of polyimide materials; they contain flexible ether groups which were introduced between rigid and highly polar imide units in order to improve the melt processability while maintaining the outstanding properties of polyimides.…”

Section: Introductionmentioning

confidence: 99%

Local and segmental motion in highly transparent and low-k poly(ether-imide) films

Damaceanu

Brumă

2014

J Polym Res

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One series of poly(ether-imide)s containing oxadiazole units have been studied with respect to the relationship between the chains structure and their physical properties, particularly thermal transitions and dielectric behavior with emphasis on the local and segmental motion, and optical clarity. High-temperature solution polycondensation reactions of an oxadiazole-containing diamine with different bis(etheranhydride)s resulted in easy soluble polymers with high molecular weights. The variation of the real and imaginary parts of the dielectric permittivity in a large frequency range, from 10 to 10 6 Hz, and in a wide temperature domain, from −150 to 250°C of the tough free-standing films prepared from these polymers was registered. The dielectric constant values, measured at room temperature and in the frequency domain of 10 Hz −1 MHz, were lower or comparable with those of Kapton HN film measured under similar conditions. The dielectric spectroscopy data were corroborated with the dynamo-mechanical analysis ones to highlight the subglass and glass relaxations encountered in these polymer films. The γ and β sub-glass viscoelastic and dielectric relaxations were explored in order to understand their molecular origins, being discussed in correlation with polymers repeating unit structure. The optical transparency of the poly(ether-imide) films has been also studied, to survey their potential for use as flexible substrates in electronic and optical devices.

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Six-member polyimides incorporating redox chromophores

Cited by 15 publications

References 30 publications

Advanced materials based on new structurally designed poly(naphthylimide-amide)s

Advanced materials based on new structurally designed poly(naphthylimide-amide)s

New High-Performance Materials: Bio-Based, Eco-Friendly Polyimides

Local and segmental motion in highly transparent and low-k poly(ether-imide) films

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