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Author : Harry Charles Wright
Publisher :
ISBN 13 :
Total Pages : 250 pages
Book Rating : 4.:/5 (979 download)
Download or read book Layered Double Hydroxides as PVC Thermal Stabilisers written by Harry Charles Wright and published by . This book was released on 2016 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mikhail David Royeppen
Publisher :
ISBN 13 :
Total Pages : 284 pages
Book Rating : 4.:/5 (11 download)
Download or read book Modified Layered Double Hydroxides as PVC Heat Stabilisers written by Mikhail David Royeppen and published by . This book was released on 2016 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrotalcite (HTC) was intercalated with different aromatic carboxylic acids via two synthesis methods: reconstruction and co-precipitation. The reconstruction method involves the rehydration of the products of LDH calcination. The co-precipitation method involves the addition of a base to solutions containing a mixture of the MII and MIII ions found in the metallic layers of an LDH. The intercalated compounds were then compounded with flexible grade PVC to see if these compounds had any effect on the heat stability of the PVC. Complete intercalation of these stabilisers did not occur; however layered double hydroxides did form for almost every synthesis. The organic acids that were to be intercalated were also present in every synthesised stabiliser. Neat hydrotalcite was the best overall stabiliser with an early stability time of 32.40 min and a final or long term stability time of 106.51 min. The best modified layered double hydroxide (LDH) in terms of early stability was 4-hydroxybenzoic acid + HTC synthesised with the reconstruction method. This stabiliser had an early stability time of 25.40 min. The best performing modified stabiliser in terms of late stability was salicylic acid + HTC synthesised with the co-precipitation method. This stabiliser had a late stability time of 71.32 min. The highly activating nature of the hydroxyl substituent group should make hydrotalcites intercalated with hydroxybenzoic acids good free radical scavengers. The substituent group positions that give the best PVC heat stability are the ortho and para positions. The pKa 2 value for an organic acid may be used as a selection parameter for intercalation into hydrotalcite. If a high pKa 2 value organic acid is intercalated into hydrotalcite, the resulting compound will have good PVC heat stabilisation properties.
Author : George Wypych
Publisher : Elsevier
ISBN 13 : 1927885620
Total Pages : 521 pages
Book Rating : 4.9/5 (278 download)
Download or read book PVC Degradation and Stabilization written by George Wypych and published by Elsevier. This book was released on 2020-03-11 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: PVC Degradation and Stabilization, Fourth Edition, includes new developments in PVC production, new stabilization methods and mechanisms, new approaches to plasticization, methods of waste reprocessing, accelerated degradation due to electric breakdown, and much more. The book contains all the information necessary for the successful design of stabilization formulas in any PVC-based product. Other topics covered include degradation by thermal energy, UV, gamma and other forms of radiation, chemical degradation, and more. Analytical methods for studying degradative and stabilization processes aid readers in establishing a system for verifying results of stabilization with different stabilizing systems. Many new topics included in this edition are of particular interest today. These comprise new developments in PVC production yielding range of new grades, new stabilization methods and mechanisms (e.g. synergistic mixtures containing hydrotalcites and their synthetic equivalents, beta-diketones, functionalized fillers, Shiff bases), new approaches to plasticization, methods of waste reprocessing (life cycle assessment, reformulation, biodegradable materials, and energy recovery), accelerated degradation due to electric breakdown, and many more Revised to include cutting-edge research, patent updates and other information required to design successful stabilization in PVC-based products Covers chemical structure, PVC manufacturing technology, morphology, degradation by thermal energy, mechanodegradation, and more Includes a chapter on the analytical methods used in studying degradative and stabilization processes Discusses information on the effects of PVC and its additives on health, safety and the environment
Author : Sabu Thomas
Publisher : Woodhead Publishing
ISBN 13 : 0081019041
Total Pages : 886 pages
Book Rating : 4.0/5 (81 download)
Download or read book Layered Double Hydroxide Polymer Nanocomposites written by Sabu Thomas and published by Woodhead Publishing. This book was released on 2019-11-28 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanocomposites based on layered double hydroxides (LDHs) have recently become a formidable research area due to their amendable properties and potential applications. The distinct properties of LDH polymer nanocomposites include a wide range of chemical compositions, structural homogeneity, unique anion exchanging ability, easy synthesis, high bound water content, memory effect, non-toxicity and biocompatibility. This means that LDH polymer nanocomposites have the potential for new and innovative applications. Layered Double Hydroxide Polymer Nanocomposites presents a comprehensive overview of the recent innovative advances in the fabrication, characterization and applications of LDH polymer nanocomposites. As well as covering fundamental structural and chemical knowledge, this book also explores various properties and characterization techniques including microscopic, spectroscopic and mechanical behaviors. There is also a strong focus on the potential applications of LDH polymer nanocomposites, such as energy, electrical and electronic, electromagnetic shielding, biomedical, agricultural, food packaging and water purification functions. This book provides comprehensive coverage of cutting-edge research in the field of LDH polymer nanocomposites and their future applications. This book will be an essential read for all academics, researchers, engineers and students working in this area. Fundamental knowledge of LDH polymer nanocomposites, including chemical composition, structural features and fabrication techniques Provides an analytical overview of the different types of characterization techniques and technologies Extensive review on cutting-edge research for potential future applications, in a variety of industries
Author : Vijay Kumar Thakur
Publisher : Woodhead Publishing
ISBN 13 : 0081007922
Total Pages : 358 pages
Book Rating : 4.0/5 (81 download)
Download or read book Hybrid Polymer Composite Materials: Structure and Chemistry written by Vijay Kumar Thakur and published by Woodhead Publishing. This book was released on 2017-06-03 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hybrid Polymer Composite Materials: Volume 1: Structure and Chemistry presents the latest on these composite materials that can best be described as materials that are comprised of synthetic polymers and biological/inorganic/organic derived constituents. The combination of unique properties that emerge as a consequence of the particular arrangement and interactions between the different constituents provides immense opportunities for advanced material technologies. This series of four volumes brings an interdisciplinary effort to accomplish a more detailed understanding of the interplay between synthesis, structure, characterization, processing, applications, and performance of these advanced materials, with this volume focusing on their structure and chemistry. Provides a clear understanding of the present state-of-the-art and the growing utility of hybrid polymer composite materials Includes contributions from world renowned experts and discusses the combination of different kinds of materials procured from diverse resources Discusses their synthesis, chemistry, processing, fundamental properties, and applications Provides insights on the potential of hybrid polymer composite materials for advanced applications
Author : Akhina H
Publisher : Springer Nature
ISBN 13 : 3031453751
Total Pages : 360 pages
Book Rating : 4.0/5 (314 download)
Download or read book Poly(Vinyl Chloride) Based Composites and Nanocomposites written by Akhina H and published by Springer Nature. This book was released on 2023-12-06 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers Poly(vinyl chloride) Fundamentals, Fabrication and characterization of PVC based composites and nanocomposites specifically natural fibre reinforced PVC composites, carbonaceous filler reinforced PVC composites , metal oxide fled PVC composites and nanocomposites etc. This book also covers the conducting PVC composites and recent advances in nanocomposites based on PVC .The rheological, mechanical, barrier, thermal, dielectric behaviour of PVC composites and nanocomposites are discussed in details.
Author : Vicente Rives
Publisher : Nova Publishers
ISBN 13 : 9781590330609
Total Pages : 518 pages
Book Rating : 4.3/5 (36 download)
Download or read book Layered Double Hydroxides written by Vicente Rives and published by Nova Publishers. This book was released on 2001 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: Layered double hydroxides are one of the variety of names given to a family of layered materials first discovered in Sweden in 1842. These materials are interesting because their layer cations can be changed among a wide selection, and the interlayer anion can also be (nearly) freely chosen. Like cationic clays, they can be pillared and can exchange interlayer species -- thus increasing applications and making new routes to derivatives. The principle areas of application include catalyst support, anion scavengers, polymer stabilisers, and antacids. In the last several years, reviews and studies of LDHs have dealt with these uses. This book aims to update the current body of LDH knowledge from a wide array of views. The first section addresses the synthesis and physiochemical characterisation of these materials, and section two focuses on the applications of LDHs.
Author : Dan Rosu
Publisher : Springer
ISBN 13 : 3319251961
Total Pages : 408 pages
Book Rating : 4.3/5 (192 download)
Download or read book Photochemical Behavior of Multicomponent Polymeric-based Materials written by Dan Rosu and published by Springer. This book was released on 2016-11-21 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers in-depth insights into the photochemical behavior of multicomponent polymeric-based materials, with a particular emphasis on the photodegradation and photostabilization of these materials. Studying various classes of materials bases such as polysaccharides, wood, synthetic polymers, rubber blends, and nanocomposites, it offers a valuable reference source for graduate and postgraduate students, engineering students, research scholars and polymer engineers working in industry.
Author : Xue Duan
Publisher : Springer Science & Business Media
ISBN 13 : 9783540282792
Total Pages : 256 pages
Book Rating : 4.2/5 (827 download)
Download or read book Layered Double Hydroxides written by Xue Duan and published by Springer Science & Business Media. This book was released on 2006-01-12 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: D.G. Evans, R.C.T. Slade: Structural Aspects of Layered Double Hydroxides.- J. He, M. Wei, B. Li, Y. Kang, D.G. Evans, X. Duan: Preparation of Layered Double Hydroxides.- C. Taviot-Gueho, F. Leroux: In Situ Polymerization and Intercalation of Polymers in Layered Double Hydroxides.- G.R. Williams, A.I. Khan, D. O'Hare: Mechanistic and Kinetic Studies of Guest Ion Intercalation into Layered Double Hydroxides Using Time-Resolved, In-Situ X-Ray Powder Diffraction.- F. Li, X. Duan: Applications of Layered Double Hydroxides
Author : Dumitru Nedelcu
Publisher : Trans Tech Publications Ltd
ISBN 13 : 3036413367
Total Pages : 125 pages
Book Rating : 4.0/5 (364 download)
Download or read book Advanced Engineering Forum Vol. 49 written by Dumitru Nedelcu and published by Trans Tech Publications Ltd. This book was released on 2023-05-31 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 49th volume of the journal includes articles representing the latest research results in chemical engineering, tribology, investigation of a hybrid power system for the loader arm, development of a method of fault identification in the electrical transmission network and series of engineering research in structural engineering and geotechnical facilities. This volume will be helpful to many engineers in the chemical industry, machinery, power engineering and construction industry.
Author : Fengge Gao
Publisher : Elsevier
ISBN 13 : 0857096249
Total Pages : 670 pages
Book Rating : 4.8/5 (57 download)
Download or read book Advances in Polymer Nanocomposites written by Fengge Gao and published by Elsevier. This book was released on 2012-10-19 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt: The addition of nanoparticles to polymer composites has led to a new generation of composite materials with enhanced and novel properties. Advances in polymer nanocomposites reviews the main types of polymer nanocomposites and their applications.Part one reviews types of polymer nanocomposites according to fillers. Processing of carbon nanotube-based nanocomposites, layered double hydroxides (LDHs) and cellulose nanoparticles as functional fillers and reinforcement are discussed, alongside calcium carbonate and metal-polymer nanocomposites. Part two focuses on types of polymer nanocomposites according to matrix polymer, with polyolefin-based, (PVC)-based, nylon-based, (PET)-based and thermoplastic polyurethane (TPU)-based polymer nanocomposites discussed. Soft, gel and biodegradable polymer nanocomposites are also considered. Part three goes on to investigate key applications, including fuel cells, aerospace applications, optical applications, coatings and flame-retardant polymer nanocomposites.With its distinguished editor and international team of expert contributors, Advances in polymer nanocomposites is an essential guide for professionals and academics involved in all aspects of the design, development and application of polymer nanocomposites. Reviews the main types of polymer nanocomposites and their applications Discusses processing of carbon nanotube-based nanocomposites, layered double hydroxides (LDHs) and cellulose nanoparticles as functional fillers and reinforcement Discusses polyolefin-based, (PVC)-based, nylon-based, (PET)-based and thermoplastic polyurethane (TPU)-based polymer nanocomposites
Author : Daniel Matlhomola Molefe
Publisher :
ISBN 13 :
Total Pages : 280 pages
Book Rating : 4.:/5 (14 download)
Download or read book Magnesium Hydroxide Derivatives as Stabilisers and Flame Retardants for Plasticised Poly (vinyl Chloride written by Daniel Matlhomola Molefe and published by . This book was released on 2015 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: The potential of magnesium hydroxide, hydromagnesite and layered double hydroxides (LDHs) as heat stabilisers and flame retardants for plasticised poly (vinylchloride) (PVC) was studied. These inorganic hydrated fillers feature flake-shaped particles with a strong tendency to agglomerate. Filler particles must be homogeneously distributed and individually dispersed in the polymer matrix in order to attain the best performance. For this reason the first step in the investigation was to explore the use of a stearic acid coating in order to improve the dispersability of these fillers in liquids. The platelet morphology-type flame retardants were coated with approximately a monolayer of stearic acid using a solvent technique. Compared to the uncoated powders, the BET surface area was lower, the powder packing density was improved, and the thickening effect on white oil was significantly reduced. The latter two observations were rationalised in terms of a reduction in the attractive interactions between the powder particles. The viscosity of white oil slurries containing 25 wt.% solids showed shear-thinning non-Newtonian behaviour. The coated powders showed significantly lower viscosities at low shear rates although the difference diminished at high shear rates. The lower viscosities shown by the coated powders indicate that the surface modification facilitated the break-up of agglomerates and aided the dispersion of individual particles in the fluid. The thermal decomposition of these hydrated fillers is central to their flame retardant action. At elevated temperatures they endothermically release inert gases. The latter dilute the atmosphere surrounding the burning sample while the endothermic decomposition cools the substrate. These two effects are responsible for the flame retardant action of these fillers. The detailed behaviour of the present samples was studied using thermogravimetric analysis and spectroscopic methods.
Author : Chahal, Kavita Shakya
Publisher : IGI Global
ISBN 13 : 1799898539
Total Pages : 276 pages
Book Rating : 4.7/5 (998 download)
Download or read book Green Chemistry for the Development of Eco-Friendly Products written by Chahal, Kavita Shakya and published by IGI Global. This book was released on 2022-06-10 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: In today’s world, it has become necessary to shift towards a more eco-friendly and sustainable approach in the industrial field to reduce pollution and stop toxic chemicals from entering the environment. Green chemistry is an emerging concept that can be utilized to assist with these environmental issues. To ensure this concept is employed to its full potential, further study on the best practices and challenges of implementation are required. Green Chemistry for the Development of Eco-Friendly Products discusses the main objective of green chemistry and how it can redefine and modify manufacturing processes and products in order to decrease hazards to human health. The book also considers key concepts of green chemistry, such as the need to make better use of available resources for the development of a chemical process. Covering critical topics such as bioplastics, waste, and hydrogen law, this reference work is ideal for chemists, business owners, environmentalists, policymakers, academicians, scholars, researchers, practitioners, instructors, and students.
Author : George Wypych
Publisher : Elsevier
ISBN 13 : 1927885000
Total Pages : 499 pages
Book Rating : 4.9/5 (278 download)
Download or read book PVC Degradation and Stabilization written by George Wypych and published by Elsevier. This book was released on 2015-03-18 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: PVC stabilization, the most important aspect of formulation and performance of this polymer, is discussed in details. This book contains all information required to design successful stabilization formula for any product made out of PVC. Separate chapters review information on chemical structure, PVC manufacturing technology, morphology, degradation by thermal energy, UV, gamma, other forms of radiation, mechanodegradation, and chemical degradation. The chapter on analytical methods used in studying of degradative and stabilization processes helps in establishing system of checking results of stabilization with different stabilizing systems. Stabilization and stabilizers are discussed in full detail in the most important chapter of this book. The final chapter contains information on the effects of PVC and its additives on health, safety and environment. This book contains analysis of all essential papers and patents published until recently on the above subject. It either locates the answers to relevant questions and offers solutions or gives references in which such answers can be found. PVC Degradation and Stabilization is must to have for chemists, engineers, scientists, university teachers and students, designers, material scientists, environmental chemists, and lawyers who work with polyvinyl chloride and its additives or have any interest in these products. This book is the one authoritative source on the subject. A practical and up-to-date reference guide for engineers and scientists designing with PVC Covers thermal, UV, gamma radiation, chemical, and other forms of degradation Includes a critical discussion of the sustainability issues faced by PVC and its additives, as well as health and safety concerns
Author : Gautam Patel
Publisher : Elsevier
ISBN 13 : 0443188610
Total Pages : 1122 pages
Book Rating : 4.4/5 (431 download)
Download or read book Advances in Functionalized Polymer Nanocomposites written by Gautam Patel and published by Elsevier. This book was released on 2024-07-17 with total page 1122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Functionalized Polymer Nanocomposites: From Synthesis to Applications presents a detailed review on the synthesis, fundamental chemistry, properties, and applications of these high-performance materials. The introductory chapter provides a brief overview of the various types of organic and inorganic nanofillers used for the synthesis of polymer nanocomposites. Emphasis is placed on their fundamental chemistry, processing methods, functionalization and/or surface modification strategies. The dispersion state and their specific interaction with polymer matrices is also discussed in detail, as well as characterization techniques for functionalized nanofillers and functionalized polymer nanocomposites, and their properties, and applications. The book will be a valuable reference source for scientists, engineers, and postgraduate students, working in the field of polymer science and technology, materials science and engineering, composites, and nanocomposites. Covers fabrication, processing, characterization, and properties of various functionalized polymer nanocomposites Explores usage in energy storage systems, biomedical fields, environmental remediation, catalysis, gas sensing, biosensing, and electromagnetic interference (EMI) shielding Provides information on lifecycle assessment and environmental and health impacts of these materials
Author : Sabu Thomas
Publisher : Elsevier
ISBN 13 : 032399475X
Total Pages : 646 pages
Book Rating : 4.3/5 (239 download)
Download or read book Poly(vinyl chloride)-based Blends, Interpenetrating Polymer Networks (IPNs), and Gels written by Sabu Thomas and published by Elsevier. This book was released on 2024-04-12 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt: Poly(vinyl chloride)-Based Blends, IPNs, and Gels brings together the latest research on the blending of PVC, covering processing, materials, properties, and applications. This book addresses these challenges and highlights the state-of-the-art in the field, such as the development of eco-friendly micro and nanostructured functional materials based on PVC and advances in experimental and theoretical studies of PVC based-polymer blends. This is a valuable resource for researchers and advanced students in polymer science, chemistry, composite science, and materials science and engineering, as well as R&D professionals, engineers, and scientists working with advanced PVC-based materials across a range of industries. Offers methodical, in-depth coverage of PVC-based blends, IPNs and gels with each polymer type Explains advanced methods for PVC-based materials with improved properties for a range of novel applications Provides avenues for improved sustainability, discussing PVC from biomass, lifecycle, recycling, and other environmental considerations
Author : Fabio Papini
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (812 download)
Download or read book Synthesis and Modification of Hydrotalcite as a Thermal Stabiliser for Poly(vinylchloride). written by Fabio Papini and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years there has been considerable interest in the use of synthetic hydrotalcites as stabilisers for poly(vinyl chloride) (PVC). Hydrotalcites are essentially hydrated magnesium-aluminium-hydroxy-carbonates: a typical formula being Mg6Al2(OH)16CO3.4H2O. Substitution of a divalent by a trivalent cation in the brucite structure creates a positive charge that needs to be counterbalanced by the presence of an anion, and this is usually carbonate. Hence, hydrotalcites are anionic clays, as opposed to the more common montmorillonite-like clays or so called cationic clays. These double-layered hydroxides have the capacity to undergo anion exchange reactions and so the carbonate can be substituted for other anions such as chloride, sulphate or nitrate. The characteristic of anion exchange means that, commercially, synthetic hydrotalcites are used for catalysis, ion scavenging, purification processes and the stabilisation of PVC formulations. This thesis present result of a project to synthesise and modify hydrotalcites to produce ultra-fine particles in recognition of the fact that the benefits of hydrotalcite could be enhanced with smaller particle sizes. The work has proceeded via two routes: firstly, by experiments to modify and intercalate the hydrotalcite with a surfactant in a way analogous to that used to montmorillonite clays, and secondly by novel synthesis methods. Two different synthesis reactions were used: one based on Urea and the second by a controlled pH method. Different drying technologies were used to obtain the optimum particle morphology and size. It was found that ultra-fine hydrotalcite particles gave an improvement in PVC thermal stability, although addition of higher levels of the hydrotalcites caused a reversal in this trend. The Haake Rheometer was used extensively to study the behaviour of the polymer clay nanocomposite formulations and to investigate the pros and cons of the addition of nanometre particles. Further work using an autoclave has resulted in particles of nanometre-sized dimensions with enhanced crystallinity and very high surface area which are promising for future work on PVC clay nanocomposites.
