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محصولات
Elastomer Stereospecific Polymerization (Advances in Chemistry Series, Volume 052) - PDF
نویسندگان: خلاصه: Addition polymerization, initiated by organometallic compounds, has in recent years aroused widespread interest mainly because of the stereospeciflc character of many of these systems. It soon became apparent that the chain propagation reaction in these systems differed markedly from that of the wellknown free radical polymerizations in that it involved an orientation of the incoming monomer instead of a more random reaction. However, elucidating the detailed mechanism of this important step has been difficult owing to lack of knowledge about the exact structure of the organometallic compound as well as the heterogeneous nature of most such systems. The available knowledge of stereoregular polymerization (1), anionic propagation kinetics (13), and organolithium polymerization (2) has recently been reviewed. Based on presently available knowledge, therefore, it is now possible to sketch some general guide lines toward a better understanding of these phenomena.
Thermoforming: A Plastics Processing Guide (2nd Edition) - Original PDF
نویسندگان: خلاصه: Dr. Gruenwald has indicated the desirable properties of polymerics for differing applications; thus, his text is especially useful for polymer chemists who must "tailor" plastic materials for specific groups of applications. Engineers in extruding and calendering film and sheet will benefit from the intimate relationships elucidated between processing parameters imposed upon stocks employed in thermoforming and the products thereof. Mold designers are provided with a complete guide that will enable them to avoid the less obvious pitfalls and wasted effort so often experienced in the evolution of molds for (especially) complex parts.. Quite likely, Dr. Gruenwald's suggestions willl lead to considerable benefits to those who read and practice by this remarkable exposition of thermoforming technology. Robert K. Jordan Director-Metalliding Institute, Director-Engineering Research Institute, Scientist in Residence, Gannon University
Severe Plastic Deformation: Methods, Processing and Properties - PDF
نویسندگان: خلاصه: All materials are composed of atoms. Depending on the order in which the atoms are arranged with one another, solid material can be classified into crystalline and noncrystalline or amorphous materials. In crystalline materials, the atoms are arranged in a repetitive or periodic array over large atomic distances, while in amorphous materials this long-range atomic order is absent. The crystalline metals with different crystal structures, such as face-centered cubic, hexagonal closed pack, or bodycentered cubic, are divided into two categories: single crystal and polycrystalline.
Molding Simulation: Theory and Practice - Original PDF
نویسندگان: خلاصه: This practical introductory guide to injection molding simulation is aimed at both students and practicing engineers. It offers ways to innovate and improve part design and molding processes, which are essential for efficient manufacturing. This user-friendly book uses a case-study-based approach that is enhanced by many illustrations in full color. The book is divided into three parts. Part I introduces the fundamentals of injection molding, focusing on the factors governing molding quality and how molding simulation methodology is developed. Part II introduces CAE verification of design, a valuable tool for both part and mold designers. Part III introduces research and development in innovative molding, illustrating how CAE is applied to advanced molding techniques.
Thermoforming - Improving Process Performance - Original PDF
نویسندگان: خلاصه: This book describes the roll-fed thermoforming process, plastic materials, design of thermoformed products, thermoforming machines, trim presses, mold design, components of a complete mold system, mold layout and machine base design, mold cost estimating, knife-like trim dies, thermoforming offline punch and die trimming
The Chemistry And Literature Of Beryllium - PDF
نویسندگان: خلاصه: All normal compounds of beryllium which are soluble in water are strongly acid in reaction to litmus, dissolve notable quantities of their own hydroxide which increases in amount with the concentration of the solution, set free carbon dioxide from carbonates and attack certain metals. In short, they act in many respects like the acids themselves would act from which they are derived. In spite of these facts they show less hydrolysis, and consequent smaller concentration of hydrogen ions, at least in the case of the chloride, nitrate and sulphate, (iveys, 1899; 10 and Brunner, 1900; 1) when treated by the well-known method of sugar inversion, than the corresponding salts of iron and aluminum. By the same method of determination, the hydrogen ions are thrown back into the undissociated condition when but a small fraction of the beryllium hydroxide has been dissolved which the normal salt is capable of holding in solution, (Parsons, 1904; 10). The reasons for these phenomena are not at present understood. The sulphate has been recently studied with a view to a solution of this problem, (1907; 10) and it has been shown that the addition of beryllium hydroxide to a solution of the sulphate, raises the freezing point and diminishes the conductivity; that no beryllium enters into the formation of a complex anion and that while the hydroxide can be partially removed by dialysis if dialyzed into pure water, there is little evidence of a colloid being present. It has been suggested that we may have here a new instance of solution, wherein the solid, when once dissolved, acts as a true solvent for its own oxide or hydroxide, and there are some analogies which point strongly to this view, (1907; n).
advance rubber composites - Original PDF
نویسندگان: خلاصه: Morphology–Property Relationship in Rubber-Based Nanocomposites: Some Recent Developments, by A. K. Bhowmick, M. Bhattacharya, S. Mitra, K. Dinesh Kumar, P. K. Maji, A. Choudhury, J. J. George and G. C. Basak; * Rubber–Clay Nanocomposites: Some Recent Results, by Amit Das, De-Yi Wang, Klaus Werner Stöckelhuber, René Jurk, Juliane Fritzsche, Manfred Klüppel and Gert Heinrich; * Surface Modification of Fillers and Curatives by Plasma Polymerization for Enhanced Performance of Single Rubbers and Dissimilar Rubber/Rubber Blends, by J. W. M. Noordermeer, R. N. Datta, W. K. Dierkes, R. Guo, T. Mathew, A. G. Talma, M. Tiwari and W. van Ooij; * Recent Developments on Thermoplastic Elastomers by Dynamic Vulcanization, by R. Rajesh Babu and Kinsuk Naskar; * PTFE-Based Rubber Composites for Tribological Applications, by M. S. Khan and G. Heinrich
Handbook of polyethylene - Original PDF
نویسندگان: خلاصه: This text provides the basic history, molecular structure and intrinsic properties, practical applications and future developments of polyethylene production and marketing - including recycling systems and metallocene technology. It describes commercial processing techniques used to convert raw polyethylene to finished products, emphasizing special properties and end-use applications.
Syndiotactic polystyrene - Original PDF
نویسندگان: خلاصه: Syndiotactic Polystyrene (SPS), synthesized in a laboratory for the first time in 1985, has become commercialized in a very short time, with wide acceptance on the global plastics market. Written by leading experts from academia and industry from all over the world, Syndiotactic Polystyrene offers a comprehensive review of all aspects of SPS of interest to both science and industry, from preparation and properties to applications.This essential reference to SPS covers:The preparation of syndiotactic polystyrene by half-metallocenes and other transition metal catalystsThe structure and fundamental properties, especially morphology and crystallization and solution behaviorThe commercial process for SPS manufacturingProperties, processing, and applications of syndiotactic polystyrenesPolymers based on syndiotactic polystyrenes, for example, by functionalization and modification, and nanocompositesIdeal for polymer chemists, physicists, plastics engineers, materials scientists, and all those dealing with plastics manufacturing and processing, this important resource provides the information one needs to compare, select, and integrate an appropriate materials solution for industrial use or research.آیا کتاب مورد نظر هنوز بر روی سایت قرار نگرفته است؟ جای نگرانی نیست! کافی است بر روی گزینه سفارش کتاب کلیک کرده و درخواست خود را ثبت کنید. در کمتر از چند ساعت کتاب شما را آماده خواهیم کرد.