Skip to main content

Polymer Science And Innovative Applications

In Order to Read Online or Download Polymer Science And Innovative Applications Full eBooks in PDF, EPUB, Tuebl and Mobi you need to create a Free account. Get any books you like and read everywhere you want. Fast Download Speed ~ Commercial & Ad Free. We cannot guarantee that every book is in the library!

Polymer Science and Innovative Applications

Polymer Science and Innovative Applications Book
Author : Mariam Al Ali AlMaadeed,Deepalekshmi Ponnamma,Marcelo A. Carignano
Publisher : Elsevier
Release : 2020-05-29
ISBN : 0128173033
Language : En, Es, Fr & De

GET BOOK

Book Description :

Polymer Science and Innovative Applications: Materials, Techniques, and Future Developments introduces the science of innovative polymers and composites, their analysis via experimental techniques and simulation, and their utilization in a variety of application areas. This approach helps to unlock the potential of new materials for product design and other uses. The book also examines the role that these applications play in the human world, from pollution and health impacts, to their potential to make a positive contribution in areas including environmental remediation, medicine and healthcare, and renewable energy. Advantages, disadvantages, possibilities, and challenges relating to the utilization of polymers in human society are included. Presents the latest advanced applications of polymers and their composites and identifies key areas for future development Introduces the simulation methods and experimental techniques involved in the modification of polymer properties, supported by clear and detailed images and diagrams Supports an interdisciplinary approach, enabling readers across different fields to harness the power of new materials for innovative applications

Applications of Ionic Liquids in Polymer Science and Technology

Applications of Ionic Liquids in Polymer Science and Technology Book
Author : David Mecerreyes
Publisher : Springer
Release : 2015-04-08
ISBN : 366244903X
Language : En, Es, Fr & De

GET BOOK

Book Description :

This book summarizes the latest knowledge in the science and technology of ionic liquids and polymers in different areas. Ionic liquids (IL) are actively being investigated in polymer science and technology for a number of different applications. In the first part of the book the authors present the particular properties of ionic liquids as speciality solvents. The state-of-the art in the use of ionic liquids in polymer synthesis and modification reactions including polymer recycling is outlined. The second part focuses on the use of ionic liquids as speciality additives such as plasticizers or antistatic agents. The third part examines the use of ionic liquids in the design of functional polymers (usually called polymeric ionic liquids (PIL) or poly(ionic liquids)). Many important applications in diverse scientific and industrial areas rely on these polymers, like polymer electrolytes in electrochemical devices, building blocks in materials science, nanocomposites, gas membranes, innovative anion sensitive materials, smart surfaces, and a countless set range of emerging applications in different fields such as energy, optoelectronics, analytical chemistry, biotechnology, nanomedicine or catalysis.

Polymer Science and Technology

Polymer Science and Technology Book
Author : Robert O. Ebewele
Publisher : CRC Press
Release : 2000-03-23
ISBN : 1420057804
Language : En, Es, Fr & De

GET BOOK

Book Description :

Your search for the perfect polymers textbook ends here - with Polymer Science and Technology. By incorporating an innovative approach and consolidating in one volume the fundamentals currently covered piecemeal in several books, this efficient text simplifies the learning of polymer science. The book is divided into three main sections: polymer fundamentals; polymer formation and conversion into useful articles; and polymer properties and applications. Polymer Science and Technology emphasizes the basic, qualitative understanding of the concepts rather than rote memorization or detailed mathematical analysis. Since the book focuses on the ultimate property of the finished product, it minimizes laborious descriptions of experimental procedures used for the characterization of polymers. Instead, the author highlights how the various stages involved in the production of the finished product influence its properties. Well-organized, clear-cut, and user-friendly, Polymer Science and Technology is an outstanding textbook for teaching junior and senior level undergraduates and first year graduate students in an introductory course covering the challenging subject of polymers.

Applications of Ionic Liquids in Polymer Science and Technology

Applications of Ionic Liquids in Polymer Science and Technology Book
Author : David Mecerreyes
Publisher : Unknown
Release : 2015
ISBN : 9783662449042
Language : En, Es, Fr & De

GET BOOK

Book Description :

This book summarizes the latest knowledge in the science and technology of ionic liquids and polymers in different areas. Ionic liquids (IL) are actively being investigated in polymer science and technology for a number of different applications. In the first part of the book the authors present the particular properties of ionic liquids as speciality solvents. The state-of-the art in the use of ionic liquids in polymer synthesis and modification reactions including polymer recycling is outlined. The second part focuses on the use of ionic liquids as speciality additives such as plasticizers or antistatic agents. The third part examines the use of ionic liquids in the design of functional polymers (usually called polymeric ionic liquids (PIL) or poly(ionic liquids)). Many important applications in diverse scientific and industrial areas rely on these polymers, like polymer electrolytes in electrochemical devices, building blocks in materials science, nanocomposites, gas membranes, innovative anion sensitive materials, smart surfaces, and a countless set range of emerging applications in different fields such as energy, optoelectronics, analytical chemistry, biotechnology, nanomedicine or catalysis.

Polyester

Polyester Book
Author : Nurhan Onar Camlibel
Publisher : BoD – Books on Demand
Release : 2018-03-14
ISBN : 9535138812
Language : En, Es, Fr & De

GET BOOK

Book Description :

Polyester is one of the most important polymers for fibers and composites. Significant developments in nanoparticle-doped polyester composites, polyester recycling, flame-retardant unsaturated polyester resins, and application of polyester for construction and automotive industry are currently carried out. Thus, this book provides leading edge research on improvements of functional properties of polyester, modifications of unsaturated polyester resins, and polyester (especially recycled polyester) usage in construction and in automotive application areas in the form of fiber, resin, and composite. The book also covers the characterization of unique features of polyester found by mechanical, chemical, physical, microstructural, and thermal analyses. This book intends to provide an understanding of the developments of functional polyester production, synthesis, and characterization and support to many academic researchers and graduate students in textile, polymer, composite, chemical science, and research and development managers in recycling and composite applications of polyester in the construction and automotive industry.

Introduction to Polymer Science and Chemistry

Introduction to Polymer Science and Chemistry Book
Author : Manas Chanda
Publisher : CRC Press
Release : 2013-01-11
ISBN : 1466553847
Language : En, Es, Fr & De

GET BOOK

Book Description :

Industry and academia remain fascinated with the diverse properties and applications of polymers. However, most introductory books on this enormous and important field do not stress practical problem solving or include recent advances, which are critical for the modern polymer scientist-to-be. Updating the popular first edition of "the polymer book for the new millennium," Introduction to Polymer Science and Chemistry: A Problem-Solving Approach, Second Edition seamlessly integrates exploration of the fundamentals of polymer science and polymer chemistry. See What’s New in the Second Edition: Chapter on living/controlled radical polymerization, using a unique problem-solving approach Chapter on polymer synthesis by "click" chemistry, using a unique problem-solving approach Relevant and practical work-out problems and case studies Examples of novel methods of synthesis of complex polymer molecules by exciting new techniques Figures and schematics of the novel synthetic pathways described in the new examples Author Manas Chanda takes an innovative problem-solving approach in which the text presents worked-out problems or questions with answers at every step of the development of a new theory or concept, ensuring a better grasp of the subject and scope for self study. Containing 286 text-embedded solved problems and 277 end-of-chapter home-study problems (fully answered separately in a Solutions Manual), the book provides a comprehensive understanding of the subject. These features and more set this book apart from other currently available polymer chemistry texts.

Advanced Polymer Science and Engineering

Advanced Polymer Science and Engineering Book
Author : Chuansheng Wang Chuansheng Wang,Lian Xiang Ma,Wei Ming Yang
Publisher : Trans Tech Publications Ltd
Release : 2011-03-28
ISBN : 3038135771
Language : En, Es, Fr & De

GET BOOK

Book Description :

Polymers are one of the key engineering materials and are widely used in many fields of economic development, and scientific and technological innovation. During their rapid development throughout the 20th century, polymers deeply influenced the entire world economy. The more than 129 peer-reviewed papers presented here cover the latest trends and achievements in this field of research and will help enterprises to improve product quality and the range of applications so as to enhance company-brand competition strength in the international market-place. This will be essential reading for design and production engineers, in particular. Volume is indexed by Thomson Reuters CPCI-S (WoS).

Plastics Technology Handbook Fifth Edition

Plastics Technology Handbook  Fifth Edition Book
Author : Manas Chanda
Publisher : CRC Press
Release : 2017-11-07
ISBN : 1351651927
Language : En, Es, Fr & De

GET BOOK

Book Description :

Updated throughout to reflect advances over the last decade, the Fifth Edition continues the handbook’s tradition of authoritative coverage of fundamentals, production methods, properties, and applications of plastics and polymer-based materials. It covers tooling for plastics fabrication processes, thermoplastics, thermosetting plastics, foamed plastics, reinforced plastics, plastisols, and new developments in mold design. It also discusses rubber compounding and processing technologies. More recent developments in polymer fabrication and processing, including electrospinning, electrografted coating, polymer-metal?hybrid joining, flex printing, and rapid prototyping/ 3D printing, are also presented. The handbook highlights advanced materials including natural and synthetic gfnanosize polymers, their unusual properties, and innovative applications, as well as polymer-carbon nanocomposites, graphene-based polymer nanocomposites, smart healable polymer composites, smart polymer coatings, electroactive polymers, polymer nanomaterials, and novel nano-/microfibrillar polymer composites. It offers updates on polymer solar battery development, plastics recycling and disposal methods, new concepts of "upcycling" and single-polymer composites, renewable synthetic polymers, biodegradable plastics and composites, and toxicity of plastics. The book also provides an overview of new developments in polymer applications in various fields including packaging, building and construction, corrosion prevention and control, automotive, aerospace applications, electrical and electronic applications, agriculture and horticulture, domestic appliances and business machines, medical and biomedical applications, marine and offshore applications, and sports.

Chemistry Manufacture and Applications of Natural Rubber

Chemistry  Manufacture and Applications of Natural Rubber Book
Author : Shinzo Kohjiya,Yuko Ikeda
Publisher : Woodhead Publishing
Release : 2021-03-26
ISBN : 0128188448
Language : En, Es, Fr & De

GET BOOK

Book Description :

Chemistry, Manufacture and Applications of Natural Rubber, Second Edition presents the latest advances in the processing, properties and advanced applications of natural rubber (NR), drawing on state-of-the-art research in the field. Chapters cover manufacturing, processing and properties of natural rubber, describing biosynthesis, vulcanization for improved performance, strain-induced crystallization, self-reinforcement, rheology and mechanochemistry for processing, computer simulation of properties, scattering techniques and stabilizing agents. Applications covered include natural rubber, carbon allotropes, eco-friendly soft bio-composites using NR matrices and marine products, the use of NR for high functionality such as shape memory, NR for the tire industry, and natural rubber latex with advanced applications. This is an essential resource for academic researchers, scientists and (post)graduate students in rubber science, polymer science, materials science and engineering, and chemistry. In industry, this book enables professionals, R&D, and producers across the natural rubber, tire, rubber and elastomer industries, as well as across industries looking to use natural rubber products, to understand and utilize natural rubber for cutting-edge applications. Explains the latest manufacture and processing techniques for natural rubber (NR) with enhanced properties Explores novel applications of natural rubber across a range of industries, including current and potential uses Discusses resources and utilization, and considers sustainable future development of natural rubber

Polymer Chemistry

Polymer Chemistry Book
Author : Sebastian Koltzenburg,Michael Maskos,Oskar Nuyken
Publisher : Springer
Release : 2017-12-11
ISBN : 3662492792
Language : En, Es, Fr & De

GET BOOK

Book Description :

This comprehensive textbook describes the synthesis, characterization and technical and engineering applications of polymers. Offering a broad and balanced introduction to the basic concepts of macromolecular chemistry and to the synthesis and physical chemistry of polymers, it is the ideal text for graduate students and advanced Masters students starting out in polymer science. Building on the basic principles of organic chemistry and thermodynamics, it provides an easily understandable and highly accessible introduction to the topic. Step by step, readers will obtain a detailed and well-founded understanding of this vibrant and increasingly important subject area at the intersection between chemistry, physics, engineering and the life sciences.Following an approach different from many other textbooks in the field, the authors, with their varying backgrounds (both from academia and industry), offer a new perspective. Starting with a clear and didactic introduction, the book discusses basic terms and sizes and shapes of polymers and macromolecules. There then follow chapters dedicated to polymers in solutions, molar mass determination, and polymers in the solid state, incl. (partially) crystalline or amorphous polymers as well as their application as engineering materials. Based on this information, the authors explain the most important polymerization methods and techniques. Often neglected in other textbooks, there are chapters on technical polymers, functional polymers, elastomers and liquid crystalline polymers, as well as polymers and the environment. An overview of current trends serves to generate further interest in present and future developments in the field.This book is the English translation of the successful German textbook "Polymere", which was awarded the Chemical Industry in Germany’s 2015 literature Prize (“Literaturpreis des Fonds der Chemischen Industrie”) for its innovative, novel approach, and its good accessibility and readability, while at the same time providing comprehensive coverage of the field of polymer science.

New Frontiers in Polymer Science

New Frontiers in Polymer Science Book
Author : Bethany Ferguson
Publisher : Unknown
Release : 2019-06-06
ISBN : 9781682856215
Language : En, Es, Fr & De

GET BOOK

Book Description :

Polymer science is a branch of material science that studies polymers especially synthetic polymers like plastic, synthetic rubber, teflon, kevlar, nylon, etc. It is developed on the principles of chemistry, physics and engineering. The major sub-disciplines of polymer science are polymer chemistry, polymer physics and polymer characterization. Polymer chemistry deals with the chemical properties and synthesis of polymers. Polymer physics explores the bulk properties of polymers and their engineering applications. The field of polymer characterization analyzes chemical structure and morphology of these materials. This book will provide in-depth knowledge about the properties and applications of polymers. The aim is to present researches that have transformed this discipline and aided its advancement. Students, engineers, researchers and all professionals working in this domain will gain innovative insights in the field of polymer science.

Intelligent Hydrogels

Intelligent Hydrogels Book
Author : Gabriele Sadowski,Walter Richtering
Publisher : Springer
Release : 2014-01-28
ISBN : 3319016830
Language : En, Es, Fr & De

GET BOOK

Book Description :

This volume of Progress in Colloid and Polymer Science assembles original contributions and invited reviews from the priority research program "Intelligent Hydrogels", funded by the German Science Foundation DFG since 2006, with about 25 contributing research groups. In the center of interest of this program and the present book are responsive hydrogels, i.e. hydrophilic polymer or polyelectrolyte networks that are able to respond to environmental stimuli such as changes in temperature, pH, additive concentration or electrical field. The activities focus on different aspects: on hydrogel synthesis, on the modeling and simulation of thermophysical hydrogel properties, as well as on innovative new hydrogel applications as smart materials. The present book summarizes the highlights in the results of the priority program in original contributions and invited reviews.

High Performance Polymers for Engineering Based Composites

High Performance Polymers for Engineering Based Composites Book
Author : Taylor & Francis Group
Publisher : Apple Academic Press
Release : 2021-03-31
ISBN : 9781774635414
Language : En, Es, Fr & De

GET BOOK

Book Description :

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 engineering, materials science, and chemistry. In addition to synthetic polymer chemistry, it also looks at the properties of polymers in various states (solution, melt, solid). The chapters provide a survey of the important categories of polymers including commodity thermoplastics and fibers, elastomers and thermosets, and engineering and specialty polymers. Basic polymer processing principles are explained as well as in-depth descriptions of the latest polymer applications in different industrial sectors. This new book reviews the field's current state and emerging advances. With contributions from experts from both the industry and academia, this book presents the latest developments in polymer products and chemical processes.

Molecular Characterization of Polymers

Molecular Characterization of Polymers Book
Author : Muhammad Imran Malik,Jimmy Mays,Muhammad Raza Shah
Publisher : Elsevier
Release : 2021-03-19
ISBN : 012822598X
Language : En, Es, Fr & De

GET BOOK

Book Description :

Molecular Characterization of Polymers presents a range of advanced and cutting-edge methods for the characterization of polymers at the molecular level, guiding the reader through theory, fundamentals, instrumentation, and applications, and supporting the end goal of efficient material selection and improved material performance. Each chapter focuses on a specific technique or family of techniques, including the different areas of chromatography, field flow fractionation, long chain branching, static and dynamic light scattering, mass spectrometry, NMR, X-Ray and neutron scattering, polymer dilute solution viscometry, microscopy, and vibrational spectroscopy. In each case, in-depth coverage explains how to successfully implement and utilize the technique. This practical resource is highly valuable to researchers and advanced students in polymer science, materials science, and engineering, and to those from other disciplines and industries who are unfamiliar with polymer characterization techniques. Introduces a range of advanced characterization methods, covering aspects such as molecular weight, polydispersity, branching, composition, and tacticity Enables the reader to understand and to compare the available technique, and implement the selected technique(s), with a view to improving properties of the polymeric material Establishes a strong link between basic principles, characterization techniques, and real-life applications

Polylactic Acid

Polylactic Acid Book
Author : Vincenzo Piemonte
Publisher : Nova Science Pub Incorporated
Release : 2014-01-19
ISBN : 9781629481487
Language : En, Es, Fr & De

GET BOOK

Book Description :

This book describes the synthesis, properties and applications of PLA through fourteen original chapters that will guide the reader through a fascinating journey into the world of PLA, providing interesting insights for those who intend to use this polymer for innovative applications, or simply those who want to learn more about this very important biodegradable and bio-based plastic. PLA biodegradability introduces this polymer in a world of eco-friendly and human-friendly applications in several technological fields. In short, this book will appeal to all the readers who not only want to have a reference book of consolidated notions on PLA, but also, and especially, to those who want to discover new potentials and new application fields of this unique biodegradable polymer.

Silica and Clay Dispersed Polymer Nanocomposites

Silica and Clay Dispersed Polymer Nanocomposites Book
Author : Md Rezaur Rahman
Publisher : Woodhead Publishing
Release : 2018-06-13
ISBN : 0081021305
Language : En, Es, Fr & De

GET BOOK

Book Description :

The production of ‘polymer nanocomposites’ has recently gained considerable attention from both the academic and industrial community, especially in the area of nanoscience. This is mainly due to their enhanced improvements in physico-mechanical, thermal and barrier properties compared to micro and more conventional composites. Their nanoscale dimensions, biodegradable character, cost-effectiveness and sustainability have constituted a stimulus for this increasing interest. Currently there is no limit to the possibility of applications. However, despite all this progress, it is still difficult to achieve uniform dispersion between the filler and the matrix, as agglomerations form far too easily and the production of polymer nanocomposites with high mechanical and thermal properties is still limited. The authors of this proposed book, are of the opinion, that with the increase in scientific publications and the rapid progress in processing possibilities to produce nanocomposites based on various nanoscale fillers (silica/clay), a book that collects all of these scientific findings in one place would be timely and of great interest to both students and scientific researchers, who are concerned with the production, and application of nanocomposites as new innovative materials. The authors aim is to present the latest research findings on the fabrication, properties and applications of nanofillers as reinforcement in polymer nanocomposites. Particular emphasis will be placed on the introduction of various nanofillers (silica/clay) into different elastomeric polymer matrices that will enhance the properties of these materials and their applications. The book will provide an up-to-date review of major innovations in the field and act as a reference for future research in materials science and engineering, which is highly topical due to the demand to produce more sustainable and eco-friendly innovative advanced materials from elastomeric polymers. Emphasis on silica/clay as outstanding reinforcing potential in elastomeric polymer matrices Up-to-date on the most relevant innovations in the field of silica/clay nanocomposites and their extensive applications in advanced material science Establishes the most suitable fabrication methods, properties and applications as a solid foundation in materials science and engineering disciplines Includes the incorporation of dual nanofillers that significantly improve the properties of nanocomposites

State of the Art Polymer Science and Technology in Italy 2019 2020

State of the Art Polymer Science and Technology in Italy  2019 2020  Book
Author : Ignazio Blanco,Roberto Pantani,Andrea Sorrentino
Publisher : Unknown
Release : 2020-09-23
ISBN : 9783039431809
Language : En, Es, Fr & De

GET BOOK

Book Description :

Polymer science and technology in Italy represent long-lasting and interdisciplinary fields in which chemistry, physics, and engineering mix together to produce studies which are considered among the best in the world. Several research groups coming from very different fields often collaborate in the design of the material, of the part, and of the processing technology to obtain innovative products with outstanding, new, and smart properties. Examples of the contributions of Italian research in the field are featured in top journals and conferences throughout the world. This Special Issue collects an overview of polymer science and technology in Italy. The research topics include: polymer composites and nanocomposites; biodegradable polymers; polymers with special properties and smart polymers; advanced characterization of polymers; new and innovative polymer processes; modeling of polymer processing; polymeric materials in additive manufacturing; process-properties relationships; polymeric parts for special applications.

Polymers for Vibration Damping Applications

Polymers for Vibration Damping Applications Book
Author : Bikash C. Chakraborty,Debdatta Ratna
Publisher : Elsevier
Release : 2020-01-22
ISBN : 0128192534
Language : En, Es, Fr & De

GET BOOK

Book Description :

Polymers for Vibration Damping Applications is a detailed guide on the use of polymers and polymer composites for vibration and shock damping. The book begins with two chapters that introduce the fundamentals of both vibration and shock damping. The next part of the book presents in-depth coverage of polymeric materials for vibration damping, including viscoelastic properties, design of polymer systems, and modes and applications. Finally, measurement techniques are discussed in detail. Throughout the book, the different perspectives of materials and engineering are considered, and both mathematical and conceptual approaches are used. This is an essential resource for all those looking to understand the application of polymers for vibration damping, including researchers, scientists and advanced students in polymer science, plastics engineering, materials science and mechanical engineering, as well as engineers and R&D personnel in the automotive, marine, defense and construction industries. Equips the reader with a complete, fundamental understanding of vibration and shock damping Explains the viscoelastic properties, design and applications of polymeric materials for vibration damping applications Includes cutting-edge research on the use of polymers for advanced civil and defense applications

Multifunctional Polymeric Nanocomposites Based on Cellulosic Reinforcements

Multifunctional Polymeric Nanocomposites Based on Cellulosic Reinforcements Book
Author : Debora Puglia,Elena Fortunati,José M. Kenny
Publisher : William Andrew
Release : 2016-07-11
ISBN : 0323417396
Language : En, Es, Fr & De

GET BOOK

Book Description :

Multifunctional Polymeric Nanocomposites Based on Cellulosic Reinforcements introduces the innovative applications of polymeric materials based on nanocellulose, and covers extraction methods, functionalization approaches, and assembly methods to enable these applications. The book presents the state-of-the-art of this novel nano-filler and how it enables new applications in many different sectors, beyond existing products. With a focus on application of nano-cellulose based polymers with multifunctional activity, the book explains the methodology of nano-cellulose extraction and production and shows the potential performance benefits of these particular nanostructured polymers, for applications across different sectors, including food active packaging, energy-photovoltaics, biomedical, and filtration. The book describes how the different methodologies, functionalization, and organization at the nano-scale level could contribute to the design of required properties at macro level. The book studies the interactions between the main nano-filler with other active systems and how this interaction enables multi-functionality in the produced materials. The book is an indispensable resource for the growing number of scientists and engineers interested in the preparation and novel applications of nano-cellulose, and for industrial scientists active in formulation and fabrication of polymer products based on renewable resources. Provides insight into nanostructure formation science, and processing of polymeric materials and their characterization Offers a strong analysis of real industry needs for designing the materials Provides a well-balanced structure, including a light introduction of basic knowledge on extraction methods, functionalization approaches, and assembling focused to applications Describes how different methodologies, functionalization, and organization at the nano-scale level could contribute to the design of required properties at macro level

Nonlinear Polymer Rheology

Nonlinear Polymer Rheology Book
Author : Shi-Qing Wang
Publisher : John Wiley & Sons
Release : 2018-02-06
ISBN : 0470946989
Language : En, Es, Fr & De

GET BOOK

Book Description :

Integrating latest research results and characterization techniques, this book helps readers understand and apply fundamental principles in nonlinear polymer rheology. The author connects the basic theoretical framework with practical polymer processing, which aids practicing scientists and engineers to go beyond the existing knowledge and explore new applications. Although it is not written as a textbook, the content can be used in an upper undergraduate and first year graduate course on polymer rheology. • Describes the emerging phenomena and associated conceptual understanding in the field of nonlinear polymer rheology • Incorporates details on latest experimental discoveries and provides new methodology for research in polymer rheology • Integrates latest research results and new characterization techniques like particle tracking velocimetric method • Focuses on the issues concerning the conceptual and phenomenological foundations for polymer rheology • Has a companion website for readers to access with videos complementing the content within several chapters