IR spectroscopic study of polymer blends and composites: A new approach

Khizhnyak, S. D.; Malanin, Mikhail; Eichhorn, K.‐J.; Пахомов, П. М.

doi:10.1134/s1560090408050138

Cited by 11 publications

(12 citation statements)

References 3 publications

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“…It is seen that in all cases there is considerable reduction in transmittance with increasing concentration of the test powder in the aqueous suspension. After analyzing the spectra according to the proposed method [6,8,9] the distribution of fi ller particles by size were derived (Figs. 1b, 1d, 1e).…”

Section: Resultsmentioning

confidence: 99%

“…For analysis of the average particle size of the fi ller and the size distribution we developed and used the spectroscopic method, which consisted in determination in the spectrum of the component associated with the weakening of the radiation incident on the sample due to scattering by fi ller particles [6,8,9]. If a dimension d of the scattering particles coincides with the wavelength λ of the incident radiation there is a signifi cant reduction in light transmission, which results in the characteristic "kink" in the spectrum.…”

Section: Methodsmentioning

confidence: 99%

“…Aggregation of particles leads to a need to calculate the average particle diameter, since this parameter affects a value of the gap between the particles, which, for example, determines the level of structural strength and mechanical properties of the material. Therefore, monitoring of the concentration and size of aggregates of the fi ller particles, as well as their size distribution is very important in the stage of preparation of polymer composites.The purpose of the study is using the spectroscopic method previously proposed [6,8,9] for analysis of aggregation processes and evaluation of size of the fi ller particles in aqueous suspension, polymer matrix, and directly in the original polymer powder. …”

mentioning

confidence: 99%

“…The purpose of the study is using the spectroscopic method previously proposed [6,8,9] for analysis of aggregation processes and evaluation of size of the fi ller particles in aqueous suspension, polymer matrix, and directly in the original polymer powder.…”

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confidence: 99%

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Evaluation of filler particle size within polymer matrix by optical spectroscopy

2014

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Polymer composites with inorganic fi llers of different nature, concentration, particle size and shape were studied by optical spectroscopy (UV, visible, and IR ranges), optical and electron microscopy, and dynamic light scattering. An experiment to determine the size of the fi ller particles in aqueous suspension in the polymer matrix of a composite and directly in powders was conducted. It was shown that with increasing concentration aggregation of particles on drying an aqueous slurry occurs to a greater extent than for the fi ller in the polymer composite. It was demonstrated by examples that the optical spectroscopy can be successfully used for the analysis of sub-micron and micron sized fi ller particles in a polymer matrix or suspension.In recent years, in the fi eld of materials science new direction associated with production of nanopowders, examination of their properties and the creation of a variety of materials based on them [1] is intensively developed. Nanoparticle powders are characterized by unique properties, and their application is extremely broad. They are used as functional additives and activators in the polymerization, reaction modifi ers in composites, and other materials [1]. For example, the use of nanosized fi llers in the production of composites allows developing new classes of structural materials with improved operational parameters [2].It is well known [3] that the effi ciency of polymer modifi cation by dispersed particles depends on the characteristics of the fi ller such as particle size and shape, their volume fraction, particle size distribution, surface properties of the fi ller (surface area of the particle, its porosity, surface charge, the presence of functional groups on surface), the uniform distribution of the fi ller particles in the matrix volume, and others. The stability of the physical properties of the obtained materials is achieved by careful monitoring of the fractional composition of the fi ller. At the same time it is important not only the accuracy but also the speed of evaluation of the geometrical parameters of the fi ller particles. In practice, there are many ways to determine the particle size of a powder: sieving, sedimentation, and centrifugal methods, methods of optical and electron microscopy, dynamic light scattering method, the method of laser diffraction analysis [4][5][6].It should be noted that aggregation of nanofiller particles into larger formation occurs in the process of manufacturing the dispersion-fi lled polymer composites [7]. The process of aggregation of the particles affects the properties of composites. Aggregation of particles leads to a need to calculate the average particle diameter, since this parameter affects a value of the gap between the particles, which, for example, determines the level of structural strength and mechanical properties of the material. Therefore, monitoring of the concentration and size of aggregates of the fi ller particles, as well as their size distribution is very important in the stage of preparation ...

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Evaluation of filler particle size within polymer matrix by optical spectroscopy

2014

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“…Наиболее распространенными методами анализа внутреннего строения полимерных композитов, в том числе геометрической формы частиц, являются методы электронной микроскопии, позволяющие исследовать сколы или срезы образцов. В работах [14][15][16][17][18][19][20] предлагается новый подход для оценки среднего размера частиц наполнителя в композитных полимерных материалах или пор в мембранах и пористых образцах, основанный на анализе спектроскопических данных (УФ-, видимый и ИК-диапазоны). Известно, что при прохождении излучения через образец его интенсивность снижается за счет поглощения и рассеяния.…”

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Determination of the Geometric Form of Scattering Particles Inside the Polymeric Matrix

Пахомов¹,

Хижняк²,

Markova³

et al. 2020

Вестник Тверского Государственного Университета. Серия: Химия

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В работе предложен новый спектроскопический метод оценки анизометрии и ориентации рассевающих частиц (пор или частиц наполнителя) внутри полимерной матрицы путем построения угловых зависимостей интенсивности рассеянного света. На примере полимерных материалов с различной геометрической формой рассеивающих частиц (частицы наполнителя и поры сферической и вытянутой форм) построены угловые зависимости интенсивности рассеянного света, отражающие геометрическую форму усредненной рассеивающей частицы. A new spectroscopic method is proposed for assessing the anisometry and orientation of scattering particles (pores or filler particles) inside a polymer matrix by constructing angular dependences of the scattered light intensity. On the example of polymeric materials with different geometric shapes of scattering particles (filler particles and pores of spherical and elongated shapes), angular dependences of the scattered light intensity are constructed, which reflect the geometric shape of the averaged scattering particle.

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