Download or read book Frontal Polymer Research written by Robert K. Bregg and published by Nova Publishers. This book was released on 2006 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymers are substances containing a large number of structural units joined by the same type of linkage. These substances often form into a chain-like structure. Starch, cellulose, and rubber all possess polymeric properties. Today, the polymer industry has grown to be larger than the aluminium, copper and steel industries combined. Polymers already have a range of applications that far exceeds that of any other class of material available to man. Current applications extend from adhesives, coatings, foams, and packaging materials to textile and industrial fibres, elastomers, and structural plastics. Polymers are also used for most composites, electronic devices, biomedical devices, optical devices, and precursors for many newly developed high-tech ceramics. This new book presents leading-edge research in this rapidly-changing and evolving field.
Download or read book Frontiers in Polymer Research written by Robert K. Bregg and published by . This book was released on 2006 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polymer Research in Microgravity written by James Patton Downey and published by . This book was released on 2001 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sixteen papers examine how gravity can affect polymerizations and polymer processing and how weightlessness or "microgravity" is achieved. The volume reviews the current research from sounding rocket and orbital investigations, parabolic flight investigations, and ground-based research. Also covered are inorganic to biologically produced polymers, including free-radical polymerization, polymer-dispersed luquid crystals and foams.
Download or read book A Study of Spin Mode Instabilities in Thermal Frontal Polymerization written by David Arrington and published by . This book was released on 1997 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Frontal Polymerization written by Narahari Pujari and published by LAP Lambert Academic Publishing. This book was released on 2010-09 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph is about investigation of frontal polymerization technique for synthesizing new materials and understanding the fundamentals involved. Monograph gives overall information on the development of frontal polymerization and covers different types of systems explored by frontal polymerization. Monograph includes investigation of new way of synthesizing polymers, such as water triggered frontal polymerization and gives in depth experimental and characterization details for some of the novel homo and copolymers synthesized by frontal polymerization. The monograph also includes detailed analysis of instabilities and physio- chemical understanding of patterns formation phenomenon in frontal polymerization.
Download or read book Study of Thermal Frontal Polymerization Utilizing Reactive and Non reactive Additives written by Veronika Grace Viner and published by . This book was released on 2009 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Performance Polymers for Engineering Based Composites written by Omari V. Mukbaniani and published by CRC Press. This book was released on 2015-12-23 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-Performance Polymers for Engineering-Based Composites presents a selection of investigations and innovative research in polymer chemistry and advanced materials. The book includes case studies in the field of nanocomposites. The volume provides coverage of new research in polymer science and engineering with applications in chemical engineerin
Download or read book Chemical Engineering of Polymers written by Omari V. Mukbaniani and published by CRC Press. This book was released on 2017-11-14 with total page 483 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this important volume, the structures and functions of these advanced polymer and composite systems are evaluated with respect to improved or novel performance, and the potential implications of those developments for the future of polymer-based composites and multifunctional materials are discussed. It focuses exclusively on the latest research related to polymer and composite materials, especially new trends in frontal polymerization and copolymerization synthesis, functionalization of polymers, physical properties, and hybrid systems. Several chapters are devoted to composites and nanocomposites.
Download or read book Analytical and Numerical Study of Frontal Polymerization written by Stephen Anthony Cardarelli and published by . This book was released on 2003 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mathematical Aspects of Frontal Polymerization written by Cynthia Ann Spade and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Frontal polymerization is a process in which a spatially localized reaction zone propagates into a monomer converting it into a polymer. Two types of frontal polymerization processes have been observed experimentally. One type is thermal frontal polymerization, which occurs due to diffusion of heat released in the polymerization reactions. We formulate a mathematical model of thermal frontal polymerization using a five-species reaction mechanism and justify its reduction to a four-species problem. We study the simplified problem both numerically and analytically, and determine important characteristics of the process such as the propagation speed of the wave, the final concentration of the monomer, the final temperature in the system, and the spatial distributions of all the species in the wave. Then we study the stability of thermal polymerization fronts, including the effect of heat losses. We formulate two models, one with simplified chemistry and the other with detailed chemistry, and determine the linear stability characteristics of the wave as a function of the system parameters for both models. The other type of frontal polymerization is an isothermal process, which is due to mass diffusion of the species coupled with the gel effect. We propose and study a basic mathematical model of isothermal frontal polymerization, relaxing the steady-state assumption in the gel region where the reactions are the most significant. We analyze various situations of initiator consumption for a weak gel effect, and study the case of a strong gel effect. Then we formulate and analyze a basic model that includes a strong inhibitor present in uniform initial concentration. We verify that the front does not propagate until the inhibitor has been completely consumed. For the isothermal models we obtain analytical results, including the time-dependent propagation velocity of the wave and the distance traveled by the front before it breaks down due to reactions ahead of the front, which are in good agreement with our numerical simulations.
Download or read book Nonlinear Dynamics with Polymers written by John A. Pojman and published by John Wiley & Sons. This book was released on 2011-03-16 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Closing a gap in the literature, this is the first comprehensive handbook on this modern and important polymer topic. Edited by highly experienced and top scientists in the field, this ready reference covers all aspects, including material science, biopolymers, gels, phase separating systems, frontal polymerization and much more. The introductory chapter offers the perfect starting point for the non-expert.
Download or read book Asymptotic Analysis of Frontal Polymerization in a Medium with Periodic Monomer Distribution written by James T. Joyner and published by . This book was released on 2006 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Frontal polymerization (FP) is a process in which a monomer-initiator mixture is converted into polymer through a self-sustaining reaction front. We study FP in a two-dimensional rectangular domain where the front propagates parallel to the axis of periodic, small reagent variations. The problems setup is motivated by the experimental use of polymerization to produce gradient materials. Further, it allows us to investigate the fundamental question of validity of Snell's law for reaction waves in a non-uniform medium. First we present a derivation of the one-step kinetics model. Then, we seek an asymptotic, steady-state traveling-wave solution using the assumption of high activation energy. As a part of our analysis, we show that the Snell's law does not hold for the ranges of parameters for which our asymptotic analysis is valid. We propose a modification to our asymptotic procedure that may reveal applicability of Snell's law in FP."--abstract.
Download or read book Advanced Materials Polymers and Composites written by Omari V. Mukbaniani and published by CRC Press. This book was released on 2021-11-18 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews several domains of polymer science, especially new trends in polymerization synthesis, physical-chemical properties, and inorganic systems. Composites and nanocomposites are also covered in this book, emphasizing nanotechnologies and their impact on the enhancement of physical and mechanical properties of these new materials. Kinetics and simulation are discussed and also considered as promising techniques for achieving chemistry and predicting physical property goals. This book presents a selection of interdisciplinary papers on the state of knowledge of each topic under consideration through a combination of overviews and original unpublished research.
Download or read book Polymer Science written by and published by . This book was released on 1999 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wrinkled Polymer Surfaces written by C. M. González-Henríquez and published by Springer. This book was released on 2019-02-14 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state of the art in surface wrinkling, including current and future potential applications in biomedicine, tissue engineering, drug delivery, microfluidic devices, and other promising areas. Their use as templates, flexible electronics, and supports with controlled wettability and/or adhesion for biorelated applications demonstrate how the unique characteristics of wrinkled interfaces play a distinguishing and remarkable role. The fabrication approaches employed to induce wrinkle formation and the potential to fine-tune the amplitude and period of the wrinkles, their functionality, and their final morphology are thoroughly described. An overview of the main applications in which these buckled interfaces have already been employed or may have an impact in the near future is included. Presents a detailed description of the physical phenomena and strategies occurring at polymer surfaces to produce wrinkled surface patterns; Examines the different methodologies to produce morphology-controlled wrinkled surface patterns by means of physical and chemical treatment methods; Provides clear information on current and potential applications in flexible electronics and biomaterials, which are leading the use of these materials.
Download or read book A Stability Analysis of Polymerization Fronts written by Donna M. G. Comissiong and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Frontal Polymerization (FP) is a process of converting monomer into polymer via a localized zone that propagates through the monomer. It bears a strong resemblance to self-propagating high-temperature synthesis (SHS), which uses combustion waves to synthesize desired inorganic materials. The reaction front propagates through the coupling of thermal diffusion and the Arrhenius reaction kinetics of the exothermic polymerization process. This thesis utilizes a moving free-boundary model to describe free-radical FP. The focus of attention here is the self-sustaining wave which travels through the reaction vessel as polymer molecules are being formed. Numerical and analytical techniques are used to determine one-dimensional traveling waves, and stability analysis (linear and weakly nonlinear) of the reaction front is performed. It is then possible to suggest ways to curb instabilities in the propagating reaction front. After our initial analysis, we account for autoacceleration and determine its effect on frontal stability. In an effort to facilitate the propagation of weakly exothermic fronts, we consider a one-dimensional polymerization wave in a sandwich-type two-layer setting. First one layer is reactive while the other is considered to be inert. Heat exchange between layers is possible, and the effect this has on frontal stability is investigated. Next, we allow both layers to be reactive, thus further enhancing inter-layer heat exchange. We comment on the effect that the second reactive layer has on the basic state of the system. Finally, two future research directions are presented in detail. One of our goals is to determine how the propagating front is affected by bulk polymerization at the far end of the reaction vessel. This is an important aspect to be studied in greater depth and incorporated into existing FP models, since bulk reactions can influence the speed and long-term stability of the reaction front. We end with a theoretical discussion for the manufacture of polymer-dispersed liquid crystal films via FP.
Download or read book Group 13 Chemistry written by Pamela J. Shapiro and published by . This book was released on 2002 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Group 13 Chemistry: From Fundamentals to Applications contains research reports and review articles in both the fundamental and applied aspects of group 13 chemistry. Topics covered illustrate the widespread influence of group 13 chemistry in modern science and technology. This volume addresses recent research and technological achievements involving group 13 chemistry and provides important background information for both experienced practitioners and novices. New developments in group 13 compounds, the stabilization of compounds of the lighter group 13 elements in their +1 oxidation state, and electron-deficient group 13 clusters, are presented. Because of the unusual geometries of newly developed electron-deficient group 13 clusters, chemists have had to reexamine and refine their models of structure and bonding. Furthermore, the stabilization of compounds of the lighter group 13 elements in their +1 oxidation state has produced some unique molecular structures and reactivity. Group 13 compounds are well known as reagents for organic synthesis and as both catalysts and cocatalysts for asymmetric organic transformations and alkene and ring-opening polymerization. Now, the design of multidentate Lewis acids is expected to exhibit enhanced activity via the cooperation of multiple electrophilic sites. Finally, a special section devoted to aluminum chemistry examines the environmental sources and biological effects of this most abundant metal. Research implicating aluminum in the etiology of neurological diseases is examined as well as potentially useful biochemical applications for aluminum in the form of Al4-.
