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Résultats de recherche pour 'ccl=su:Polymeric composites and homebranch:SDI'
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Kozlov, G. V.
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Kozlov,, G.
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Mikitaev,, A.
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Yanovsky, Yu. g
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Zaikov,, G.
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Polymer and composites:
theory and practical applications
Publication :
[S.l.] Nova Science Publishers 2011 . 205 p. , This book examines polymer nanocomposites filled by inorganic nanofillers. Polymers are considered as nanocomposite matrix only, possessing, as a rule, an invariable structure. In many respects this situation is explained by the absence of a quantitative structural model of polymers amorphous state. This problem becomes particularly important because all structural elements of polymers have sizes of nanometer scale. The development of notions about polymers amorphous state structure within the frameworks of the cluster model of this structure allows to represent amorphous polymer as a quasitwophase system. 27 cm.
Date :
2011
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Polymer nanocomposites
variety of structural forms and applications
par
Mikitaev,, A.
Publication :
[S.l.] Nova Science Pub Inc, 2009 . 319 p. , Nanotechnologies development in various directions of science and engineering represents one of the most high-priority problems of modern science. One of such directions is the development and research of polymer nanocomposites with filler from nanoparticles and nanotubes possessing the increased strength and flame-resistance. In the last decade in the world literature, a large amount of works have appeared which are dedicated both to technological and fundamental problems of polymer nanocomposites creation. The main part of these works adduced studies of polymer nanocomposites structure and properties, in which as filler organoclays with particles size of nanometre scale (for example, Na+-montmorillonite) were applied as a filler. Key studies in this field mainly use various kinds of modifications of large micromechanical models, created at one time for the description of polymer composites properties in general.These modifications are cumbersome enough, and mainly use complex computer technologies and although with their help convincing enough results were obtained, one should pay attention on their narrowness. In present quite many classes of polymer nanocomposites are obtained, having different reinforcement mechanisms, but the general ones in the sense, that these mechanisms are realised at the expense of introduction in polymer matrix particles of nanometre sizes. As it is known, the main peculiarity of such particles is a sharply increased polymer-filler contact area in comparison with usual fillers of micron scale size, that gives maximum reinforcement effect at small nanofiller contents. Hence it follows, that the main research object in the given case should be interfacial phenomena on polymer matrix-filler boundary, to which Academician Lipatov pointed as long as 40 years ago.Another important postulate is the fractal nature of nanoparticles structure, defining the mentioned above interfacial interactions level. The two postulates mentioned would be the main at the structure and properties of polymer nanocomposites analysis in the present monograph. At the same time the authors do not exclude the application of other model representations, for example, of the mentioned above micromechanical models. The purpose of the present monograph is the research of structure-properties relationships, defining a polymer nanocomposites reinforcement mechanism, for seven different classes of these materials. For these tasks solution the modern physical conceptions: synergetics of solid body, cluster model of polymers amorphous state structure, percolation theory are used. 27 cm.
Date :
2009
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Synergetics and fractal analysis of polymer composites filled with short fibers
par
Kozlov, G. V.
Publication :
New York Nova Science Publishers Inc 2011 . 223 p. , The interest in polymer composites study is due to an even greater degree of their application. The filling by hard disperse particulates or fibres gives to polymers a desirable properties number: increases stiffness, reduces thermal expansion coefficient, rises resistance to yield and fracture toughness and so on. Difficulties in research of structure-properties relationships for polymer composites are due to their structure complexity. So, on the elasticity modulus value besides composition a polymer-filler interaction influences. In other words, it is clear even intuitively that for the complete description of such structurally-complex objects as polymer composites it is necessary to account for three groups of factors, namely, polymeric matrix structure, filler structure and level of interaction between them. Up to now the researches of such kind were carried out within the frameworks of continuous mechanics and thermodynamic conceptions. However, these conceptions application does not allow to describe satisfactorily and all the more to predict such materials properties. As a matter of fact, an experimental data set dictates the choice of either structure physical model for macroscopic properties description. 27 cm.
Date :
2011
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