Relaxation processes in an aromatic polyamide-imide and composites on its basis with hydrosilicate nanoparticles

Afanas’eva, N. V.; Gubanova, G. N.; Ромашкова, К. А.; Sapegin, Denis Andzheevich; Кононова, С. В.

doi:10.1134/s0965545x16060018

Cited by 9 publications

(9 citation statements)

References 36 publications

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“…The exotherm at 289 °C connected to the ordering of supramolecular PAI structure, that was previously observed for PAI samples in this temperature range, increased to 33.7 J g −1 in the case of 7:3 composite (Figure ) and to 40.91 J g −1 in the case of 6:4 composite (Figure ). These values are more than weight‐normalized algebraic sum of enthalpies of exotherms of PI‐S and PAI (Table ).…”

Section: Resultssupporting

confidence: 75%

“…On the tg δ curve of the 7:3 composite three relaxation transitions are recorded: the maximum at 266 °C, related to glass transition of the PAI in the composite (α‐transition), broad transition (β′) with the maximum at 172 °C caused by molecular mobility in the presence of NMP, and in low‐temperature range at 70 °C secondary β transition. The presence of the PI‐S phase is manifested through the shoulder on tg δ curve at 290 °C.…”

Section: Resultsmentioning

confidence: 99%

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Preparation, structure, and pervaporation performance of poly(amide–imide)‐sulfonated polyimide composites

Кононова

Sapegin²,

Kruchinina

et al. 2019

J of Applied Polymer Sci

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The current image by Svetlana Viktorovna Kononova, Denis Sapegin, and colleagues represents phase heterogeneity between sulfonated polyimide and poly(amide-imide) polymer phases in the composite film with 7:3 polyimide to poly(amide-imide) weight ratio. Most likely, in this composite, a three-dimensional crystallizing network of polyimide is formed around poly(amide-imide) which is to form an amorphous phase. This assumption was confirmed by the data of the energy-dispersive analysis since it is in the region of the network structure sulfur atoms were detected, which are present in this composite only in the structure of sulfonated polyimide. ARTICLES 48159 Bio-based β-myrcene-modified solution-polymerized styrene-butadiene rubber for improving carbon black dispersion and wet skid resistance

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Section: Resultssupporting

confidence: 75%

Section: Resultsmentioning

confidence: 99%

Preparation, structure, and pervaporation performance of poly(amide–imide)‐sulfonated polyimide composites

Кононова

Sapegin²,

Kruchinina

et al. 2019

J of Applied Polymer Sci

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“…The introduction of SNT into polyamide-imide films (PAI-1 or PAI-2) changes the properties of these polymers, that was showed in Reference [29] and this effect was studied in References [140,141]. It is important that the properties of PAI-1 change completely differently from the properties of PAI-2 when introducing the same nano-filler-SNT in the same quantities under the same conditions.…”

Section: Appl Sci 2018 8 X For Peer Review 20 Of 40mentioning

confidence: 99%

“…Nanoscale is considered where the dimensions of the modifying particles, plates or fibers are in the range of 1-100 nm. The differences would be expected in those cases where The introduction of SNT into polyamide-imide films (PAI-1 or PAI-2) changes the properties of these polymers, that was showed in Reference [29] and this effect was studied in References [140,141].…”

Section: Appl Sci 2018 8 X For Peer Review 20 Of 40mentioning

confidence: 99%

Polymer Nanocomposite Membranes

et al. 2018

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Based on the results of research works reflected in the scientific literature, the main examples, methods and approaches to the development of polymer inorganic nanocomposite materials for target membranes are considered. The focus is on membranes for critical technologies with improved mechanical, thermal properties that have the necessary capabilities to solve the problems of a selective pervaporation. For the purpose of directional changes in the parameters of membranes, effects on their properties of the type, amount and conditions of nanoparticle incorporation into the polymer matrix were analyzed. An influence of nanoparticles on the structural and morphological characteristics of the nanocomposite film is considered, as well as possibilities of forming transport channels for separated liquids are analyzed. Particular attention is paid to a correlation of nanocomposite structure-transport properties of membranes, whose separation characteristics are usually considered within the framework of the diffusion-sorption mechanism.

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“…In the last few decades, spontaneously scrolling nanotubular hydrosilicates like imogolite, halloysite, and chrysotile have garnered increased attention due to their application as polymer fillers [17][18][19] (i.e. an alternative to carbon and chalcogenide nanotubes [20,21]), sorbents and drug containers [22][23][24], catalyst materials [25][26][27][28], and materials for Li-ion energy sources [29].…”

Section: Introductionmentioning

confidence: 99%

Redistribution of Mg and Ni cations in crystal lattice of conical nanotube with chrysotile structure

Krasilin¹,

Гусаров²

2017

Nanosystems: Phys. Chem. Math.

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Recently, nanotubular hydrosilicates have attracted attention due to numerous possible applications and intriguing formation mechanism. In this study we estimate energy effect of cylindrical and conical (Mg 0.5 ,Ni 0.5 ) 3 Si 2 O 5 (OH) 4 nanotube formation depending on their size parameters, cone angle, and Mg-Ni redistribution function. The calculations show that, as we expected, conical morphology is less preferable from an energy perspective than the cylindrical one, and the energy difference between them increases with the cone angle. Nevertheless, Mg and Ni cations redistribution along side length decreases strain energy of conical nanotube. This effect reaches its maximum of ∼ −75 kJ/mol at a cone angle of 5• .

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Relaxation processes in an aromatic polyamide-imide and composites on its basis with hydrosilicate nanoparticles

Cited by 9 publications

References 36 publications

Preparation, structure, and pervaporation performance of poly(amide–imide)‐sulfonated polyimide composites

Preparation, structure, and pervaporation performance of poly(amide–imide)‐sulfonated polyimide composites

Polymer Nanocomposite Membranes

Redistribution of Mg and Ni cations in crystal lattice of conical nanotube with chrysotile structure

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