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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.
This book is one of many volumes which presents current research in the study of quantum-chemical calculations of various molecular systems. The research results presented suggest that the development of nanotechnologies will offer new and more effective advancements for the improvement of penicillins, vitamins and catalysts. The results of quantum-chemical calculations of various molecular systems presented here are the first step toward the development of new nanotechnologies.
This book presents current research in the study of quantum-chemical calculations of various molecular systems. The research results presented suggest that the development of nanotechnologies will offer new and more effect advancements for the improvement of penicillins, vitamins and catalysts. The results of quantum-chemical calculations of various molecular systems presented here are the first step toward the development of new nanotechnologies.
This book presents current research in the fields of biochemistry and biotechnology. Topics discussed include information about the production of thermostable DNA polymerase suitable for whole-blood polymerase chain reaction; isolation, purification and some properties of L-Lysine a-Oxidase from 'Trichoderm' sp. 6; production of nitric oxide by endothelial cells infected with herpes simplex virus type 1; optimisation of the process of cultivation of recombinant Escherichia coli TBI protein producing strain; development of HRP-functionalised carbon-coated iron nanoparticales using arenediazonium tosilates; experimental approach to the induction of nonculturable state of Lactococcus lactis; and, callus culture technology of spring soft wheat stress tolerant varieties.
This book examines topical data on the subject of chemical reactions in different phases of gas, liquid and solid states, such as the classification of polymers in reactivity toward nitrogen oxide; influence of the initiation rate of radicals on the kinetic characteristics of quercetin and dihydroquercetin in the methyl oleate oxidation; supercritical carbon dioxide swelling of polyheteroarylenes synthesised in N-methylpyrrolidone; inhibition of 2-hexenal oxidation by essential oils of ginger, marjoram, juniper berry, black and white pepper; specific properties of some biological composite materials; properties and applications of aminoxyl radicals in polymer chemistry and others.
Book & CD. This book aims to present the progress in the science of polymers and monomer, synthesis, study of properties and application of polymers, polymer mixtures, composites and filled polymers. The book collects original articles and reviews important for both pure and applied chemistry. The application of polymers in medicine, composites and nanocomposites, reduction of polymer material combustibility, kinetics and the mechanism of various reactions are of special attention. Both synthetic and natural polymers are discussed. Some part of the collection, related to chemistry and physics of polymers, is devoted to oligomers and low-molecular compounds. This book brings together new and exciting research in this field.
This book includes the latest information in the field of organic chemistry, biochemistry, biotechnology, material science (synthesis, properties, applications) and renewable resources. This book discusses the modification of chitosan films as a way of regulating their transport properties, ozone and its reactions with diene rubbers, antiradical activity of different antioxidants depending on pH and polarity of model system detected by a photochemilumin scence method, the interlayer spacing and elasticity modulus interconnection for nanocomposites polymer/organoclay.
This book is one of many volumes which presents current research in the study of quantum-chemical calculations of various molecular systems. The research results presented suggest that the development of nanotechnologies will offer new and more effective advancements for the improvement of penicillins, vitamins and catalysts. The results of quantum-chemical calculations of various molecular systems presented here are the first step toward the development of new nanotechnologies.
This book presents current research in the study of quantum-chemical calculations of various molecular systems. The research results presented suggest that the development of nanotechnologies will offer new and more effect advancements for the improvement of penicillins, vitamins and catalysts. The results of quantum-chemical calculations of various molecular systems presented here are the first step toward the development of new nanotechnologies.
In chemistry, condensed phases are both liquid and solid state. Gas and condensed phases are different in many parameters. Papers on chemical reactions in solid and liquid phases are collected in this volume, homogeneous and heterogeneous processes are discussed. Special attention paid to effects of metals and their oxides on the tribological characteristics of the composites, behaviour of polyurethanes in biological media, behaviour of some solid oxides irradiated in different media, nanotechnology in polymer coatings, structural peculiarities of polymers and co-polymers, radical polymerisation and co-polymerisation PMR and NMR structural characteristics of different compounds, synthesis of new polyfunctional polymers, synthesis and investigation of properties of natural and synthetic polymers and co-polymers, polymer coatings and films, investigation of oligosulfons properties, macrokinetic mechanism of biodegradation of polymers, polyazomethine-esters based on a new aromatic dialdehydes, the influence of polyazomethines on physicomechanical properties of polymers, the possibility of use of embolising preparates for chemoemobolisation, some important parameters for control of proteolytic reaction on wool, kinetics and mechanism enzymatic degradation of chitosan, polymers as natural nanocomposites (the geometry of intercomponent interactions, the comparative analysis of reinforcement mechanisms, thermophysical properties, the stress concentration and strength, molecular mobility level in polymers, elasticity modulus and polymer chains tightness), biomimetic oxidation, biocide and toxicological characteristics, synthesis and study of phenol-formaldehyde type of polymers, modern basalt fibrous materials and basalt fibre based polymeric composites, etc. Papers on degradation of polymers and recycling of polymers are presented in this volume as well. We would like to remind that processing of waste products is very important, but for example in Russia only 1.5% of waste products is being processed, in Germany -- 60%, in Denmark and Switzerland -- 80%, in Japan -- 85-88%. Ideally, 100% of waste products should be used again after processing.
Nanotechnology has continuously evolved sharing with past technologies the same approaches to science policy, therefore, it is problematic to consider nanotechnology as a radical change in the development of technology. This book offers an overview of structure--property relationships, synthesis and purification, and potential applications of electrospun nanofibres and nanotubes. The collection of topics in this book aims to reflect the diversity of recent advances in nanotechnology with a broad perspective which will be useful for scientists as well as for graduate students and engineers.
This book focuses on biotechnology is a collection of technologies that capitalise on the attributes of cells and biological molecules. Biotechnology will help improve the ability to customise therapies based on individual genomics; prevent, diagnose, and treat all types of diseases rather than rely on rescue therapy and provide breakthroughs in agricultural production and food safety.
This volume has the title CHEMISTRY AS MUSIC because both chemistry and music can be good or bad, joyful or sorrowful, fast and slow. Not everybody can play as well as Nikolo Paganini, Ferenz List, or Sergei Rakhmaninov, and similarly, not everyone can accomplish complicated organic and inorganic syntheses. In both fields, golden hands are needed (preferably combined with a brilliant mind).The editors of this new book have tried to include in this volume papers on organic synthesis, biochemical physics, chemical kinetics, physical chemistry, and chemical physics. It is the fastest-evolving science today, on the cutting edge of modern technology. The authors of the papers are some of the leading researchers in their fields from the best research centres of their countries: representatives of pure and applied chemistry.
Biocatalytic Technology & Nanotechnology
This book presents current research in the study of quantum-chemical calculations of various molecular systems. The research results presented suggest that the development of nanotechnologies will offer new and more effect advancements for the improvement of penicillins, vitamins and catalysts. The results of quantum-chemical calculations of various molecular systems presented here are the first step toward the development of new nanotechnologies.
This book provides a pointed introduction to the fascinating subject of bottom-up nanotechnology with emphasis on the polymer-based nanostructured systems. This book will be of particular interest to graduate students and even ambitious undergraduates in engineering and science, as well as those students who already have some familiarity with nanofibers and nanochemistry. It is also suitable for experts in related fields who require an overview of the fundamental topics in nanotechnology.
This book reviews new information in chemical and biochemical physics, including research on polymers in polluted atmospheres, free radical and ion-radical conversions initiated by nitrogen oxides, selective catalytic oxidation of hydrocarbons, the mechanism of the ethylbenzene oxidation with dioxygen, catalysed by cobalt complexes, measurements of the total phenol type antioxidant content in berry, fruit and vegetable juice mixes, as well as some applications of nanocarbon materials for novel devices, functionalisation of some oligomers in the presence of different catalytic systems and others.
This book presents and discusses current research in the study of renewable resources and biotechnology for material applications. Topics discussed include the potential of sorghum varieties as a bioenergy crop; enzyme modified grain by-product reinforced polypropylene composites; biomass as combustion fuel; efficiency of hemp essentials oil depending inflorescence harvest and the new biostymulator for increasing crops resistance to drought stress.
This book presents current research in the study of quantum-chemical calculations of various molecular systems. The research results presented suggest that the development of nanotechnologies will offer new and more effect advancements for the improvement of penicillins, vitamins and catalysts. The results of quantum-chemical calculations of various molecular systems presented here are the first step toward the development of new nanotechnologies.
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.
The given compilation is devoted to such anniversary of Professor Gennady E Zaikov. His scientific biography (with social impregnations) you can read in the first chapter of the given compilation. The compilation itself has been prepared by those scientists with whom G E Zaikov worked during more, than half a century of his scientific career.
The role of polymer chemistry (pure and applied sciences) is very prominent in the world of science today, but it is heading away from polymers and polymer blends towards composites and nanocomposites. This allows for the creation of new materials with unique properties and new possibilities which is the subject of this book.
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 exlude 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. |
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