The Regularity Bands in the Infrared Spectra of Polymers with Distortions in Structural Periodicity

Kumpanenko, I. V.; Чуканов, Н. В.

doi:10.1070/rc1981v050n09abeh002690

Cited by 16 publications

(6 citation statements)

References 4 publications

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“…New absorption bands listed above are characterized by small half-widths (d). To the first approximation, d $ (N h ) À0.5 for condensed systems with chain molecules, 34 where N h is the characteristic length of the chain participating in correlated acoustic vibrations. It has to be noted that topological effects could also play important role in the formation of such structure in the copolymers under study.…”

Section: Discussionmentioning

confidence: 99%

Influence of parameters of molecular mobility on formation of structure in ferroelectric vinylidene fluoride copolymers

Kochervinskiĭ

Malyshkina

Павлов

et al. 2015

Journal of Applied Physics

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Articles you may be interested inStructural and dielectric properties of poly(vinylidene fluoride)-based terpolymer/copolymer blends developed on aluminum foil J. Appl. Phys. 112, 053505 (2012); 10.1063/1.4748181 Interacting and noninteracting dipole systems in ferroelectric poly(vinylidene fluoride-trifluoroethylene) copolymer J. Appl. Phys. 108, 084109 (2010); 10.1063/1.3499614 Structural evolution and dielectric relaxation behavior of electron-irradiated poly(vinylidene fluoride-trifluoroethylene) 80/20 mol % copolymers J. Appl. Phys. 94, 5566 (2003); 10.1063/1.1606853 Infrared spectroscopic ellipsometry study of vinylidene fluoride (70%)-trifluoroethylene (30%) copolymer Langmuir-Blodgett films J. Appl. Phys. 94, 195 (2003); 10.1063/1.1578697Dielectric relaxation behavior and its relation to microstructure in relaxor ferroelectric polymers: High-energy electron irradiated poly(vinylidene fluoride-trifluoroethylene) copolymersThe low-temperature molecular mobility has been studied by dielectric relaxation spectroscopy on the bulk films of statistic copolymers of vinylidene fluoride (VDF) with tetra-(TFE) and trifluoroethylene obtained by crystallization from a solution in acetone. The results show that activation energy of the kinetic units in the glassy state depends significantly on the concentration of polar groups. The cooperative mobility above the glass transition temperature is described by Vogel-Tamman-Fulcher equation; the lowest value of the effective activation energy was found in the copolymer with highest amount of non-polar TFE content. It has been shown that the parameters of the dynamics are related to the structural parameters obtained by infrared spectroscopy, wide-angle X-ray Spectroscopy, and small-angle X-ray scattering. In particular, the largest crystals and the highest value of the "large" period have been detected in VDF/TFE copolymer with lowest activation parameters of microbrownian and local mobility. Number of lamellar crystals in stacks is determined by the concentration of VDF polar groups in copolymer chain. V C 2015 AIP Publishing LLC.

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Section: Discussionmentioning

confidence: 99%

Influence of parameters of molecular mobility on formation of structure in ferroelectric vinylidene fluoride copolymers

Kochervinskiĭ

Malyshkina

Павлов

et al. 2015

Journal of Applied Physics

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“…The peaks in the infrared spectrum of poly(propylene) at 998 and 843 cm À1 originate from at R. Brüll et al [15][16][17][18] The peak at 973 cm À1 has been reported as insensitive to the amorphous/crystalline ratio and can be used as reference. [19] The degree of spectral crystallinity across the pipe wall was profiled using the ratio of the bands at 998/973 ( Figure 4) and 843/973, respectively. Only one distribution of morphology related spectral property is displayed in this article because the shape of profiles as calculated from the different band ratios agrees well for the same specimen.…”

Section: Resultsmentioning

confidence: 99%

Analysis of the Influence of Processing Conditions on the Supramolecular Structure and Antioxidant Distribution in PP‐Pipes Using Infrared Microscopy

Brüll¹,

Geertz²,

Kothe³

et al. 2008

Macro Materials & Eng

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The supramolecular structure in pipe walls of isotactic PP‐R is a function of compound composition and processing parameters, which both influence the mechanical properties of the pipes. µFTIR shows a gradient of the crystallinity across the pipe wall, with a lower‐crystalline outer layer, and a higher‐crystalline core layer. The rate of extrusion has an influence on the thickness of the outer layer. The nucleating effect on the morphological profile throughout the pipe wall can be visualised. µFTIR shows a homogeneous distribution of the primary antioxidant in the pipe wall. Both the spectral crystallinity and the antioxidant concentration distribution are calculated.magnified image

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“…As was shown in [19] using cluster approximation, once fragments with regular (helical) structure are identified, we can consider their vibrations independently of the vibrations of the remaining part of the chain. In such approximation, Kumpanenko and Chukanov [19] derived the analytical expression describing the dependence of optical density in a maximum of regularity band, D max , on the average length N of regular fragment In the IR absorption spectra of carbon-chain polymers (matrices formed after decarboxylation), the regularity band is the band assigned to deformation vibrations of C-H groups of a backbone (δ ë-ç , the range of 720-950 cm -1 ). On the contrary, the band of C-H stretching vibrations (ν ë-ç , 2800-3000 cm -1 ) is the least sensitive to polymer structure and it can be used as an internal standard.…”

Section: Composition Of Transformation Productsmentioning

confidence: 99%

Structural organization and thermal transformations of various Ni(II) complexes as precursors of polymer-metal nanocomposites

Rozenberg¹,

Dzardimalieva²,

Чуканов³

et al. 2005

Colloid J

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Peculiarities of thermal transformations of metal-containing monomers and polymers prepared by various synthetic routes are analyzed. It is shown that the thermal stability of metalcarboxylate groups is determined by the spatial organization of the nearest environment and the microstructure of polymer chains formed as a result of thermal transformations. Main paths of thermal transformations of studied compounds are considered. Qualitative and quantitative compositions of the gaseous and solid-phase products at the end of transformations and some properties of forming polymer-metal nanocomposites are studied. 1 60th communication from "Preparation and Reactivity of MetalContaining Monomers" series. For 59th communication see [1].

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The Regularity Bands in the Infrared Spectra of Polymers with Distortions in Structural Periodicity

Cited by 16 publications

References 4 publications

Influence of parameters of molecular mobility on formation of structure in ferroelectric vinylidene fluoride copolymers

Influence of parameters of molecular mobility on formation of structure in ferroelectric vinylidene fluoride copolymers

Analysis of the Influence of Processing Conditions on the Supramolecular Structure and Antioxidant Distribution in PP‐Pipes Using Infrared Microscopy

Structural organization and thermal transformations of various Ni(II) complexes as precursors of polymer-metal nanocomposites

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