Highly transparent and hydrophobic fluorinated polyimide films with ortho-kink structure

Damaceanu, Mariana‐Dana; Constantin, Catalin-Paul; Nicolescu, Alina; Brumă, Maria; Belomoina, N. M.; Begunov, R. S.

doi:10.1016/j.eurpolymj.2013.10.030

Cited by 74 publications

(42 citation statements)

References 22 publications

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“…The dispersive components of the surface free energy are near to those reported by other authors (ca. 30 mJ m −2 ) being in the range of 15.02–29.57 mJ m −2 . The increased values of the dispersive components of PA2 compared with PA1 accounts for an increased degree of molecular packing of the PA2 chains, which is more favored by the presence of less voluminous groups and quite flexible lateral phenoxy moieties.…”

Section: Resultsmentioning

confidence: 98%

Insights into the Chain and Local Mobility of Some Aromatic Polyamides and Their Influence on the Physicochemical Properties

Damaceanu¹,

Rusu²,

Cristea³

et al. 2014

Macro Chemistry & Physics

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This study refers to the relationship between the macromolecular structure of two aromatic fluorinated polyamides and their physical properties, with emphasis on the overall and local chain mobility and their influence upon thermal transitions, dielectric relaxations, and gas permeability/selectivity. One polyamide contains naphthalene and 1,3,4‐oxadiazole units in the main chain, while the other is based on an aromatic asymmetrical diamine containing a phenoxy‐substituted benzophenone segment. Free‐standing, tough, and defectless films, having a hydrophobic character are prepared from these polymers and used afterward for various measurements. The polyamide films show excellent thermal stability, their decomposition starting around 400 °C. The dielectric spectroscopy data corroborate the dynamic‐mechanical analysis, showing distinct γ and β sub‐glass relaxations, which are discussed in correlation with the chemical structure of each polymer. The permeability of several gases through these membrane‐forming materials are measured and discussed with respect to the structural variations in the polyamide repeating unit.

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Section: Resultsmentioning

confidence: 98%

Insights into the Chain and Local Mobility of Some Aromatic Polyamides and Their Influence on the Physicochemical Properties

Damaceanu¹,

Rusu²,

Cristea³

et al. 2014

Macro Chemistry & Physics

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“…However, the limitation of PI as an organic coating lies in the water absorption [2], which is a drawback for its use in coating for anticorrosion. The adoption of fluorine-containing monomers can enhance the hydrophobicity of PI [3] but superhydrophobicity cannot be simply achieved with monomer substitution since the surfaces have to be rough. The major limitation toward achieving superhydrophobicity of PI surfaces, however, lies in its flatness and poor workability after imidization.…”

Section: Introductionmentioning

confidence: 99%

Preparation of superhydrophobic polyimide films modified with organosilicasol as effective anticorrosion coatings

Huang

Hsiao

et al. 2014

Surface and Coatings Technology

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“…Two new diamines with ortho ‐kink structure, 4‐bis[2‐amino‐4‐(trifluoromethyl)phenyl]piperazine (M1) and 1,4‐bis[2‐amino‐4‐(trifluoromethyl)phenoxy)]benzene (M2) were prepared by aromatic nucleophilic substitution reactions by Begunov and his coworkers ( Scheme ) . One‐step high‐temperature polycondensation of these diamines with fluorinated aromatic dianhydrides resulted in preparation of highly soluble PIs (soluble at room temperature even in THF) with excellent thermal stability, up to 345 °C, and high T g s in the range of 142–266 °C.…”

Section: Recent Design Approaches To Prepare Cpismentioning

confidence: 99%

Recent Trends on Transparent Colorless Polyimides with Balanced Thermal and Optical Properties: Design and Synthesis

Tapaswi

2019

Macro Chemistry & Physics

170

155

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Recently, colorless and transparent plastic substrates with high glass transition temperature and suitable thermo‐mechanical properties are in high demand in optoelectronic device industries, due to their various optical applications. Colorless polyimides (CPIs) exhibit both high thermo‐mechanical stability as well as high transparency that are suitable for optoelectronic applications. The most recent (2010–2018) developments on CPIs, in terms of design and synthesis of new monomers and their effects on the thermo‐optical properties of the obtained CPIs, are reviewed in this article.

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Highly transparent and hydrophobic fluorinated polyimide films with ortho-kink structure

Cited by 74 publications

References 22 publications

Insights into the Chain and Local Mobility of Some Aromatic Polyamides and Their Influence on the Physicochemical Properties

Insights into the Chain and Local Mobility of Some Aromatic Polyamides and Their Influence on the Physicochemical Properties

Preparation of superhydrophobic polyimide films modified with organosilicasol as effective anticorrosion coatings

Recent Trends on Transparent Colorless Polyimides with Balanced Thermal and Optical Properties: Design and Synthesis

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