Download or read book Polymeric Amphiphilic Nanoparticles Via Intramolecular Chain Collapse Using 1 functionalized Vinylbenzocyclobutenes written by William Kenneth Storms and published by . This book was released on 2015 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthetic routes to 1-functionalized 4-vinylbenzocyclobutenes were developed with cyano, ester, amide and acetoxy 1-functional groups. The synthesis of a high molecular weight diblock quaterpolymer (i.e. two block, with two monomers in each block), where the blocks were highly immiscible (hydrocarbon/aliphatic fluorocarbon) and each contained a thermal crosslinker with a distinct curing temperature range, i.e. a "low" temperature crosslinker and a "high" temperature crosslinker by sequential polymerization using controlled radical polymerization was investigated. The synthesis of the desired diblock quaterpolymer was difficult or impossible due to radical chain transfer to 1-ethoxybenzocylcobutene. Fast chain-transfer to 1-ethoxybenzocyclobutene caused the polymerization to be inefficient and poorly controlled. Using a combination of ATRP and post-polymerization functionalization via the nucleophilic aromatic substitution of poly(pentafluorostyrene), a modular route to a strongly phase segregating benzocyclobutene functional diblock quaterpolymer was established. A linear diblock quaterpolymer was collapsed in two steps under pseudo-high dilution conditions into an amphiphilic single chain nanoparticle. Characterization of the soft organic particles by GPC, 1H- and 19F-NMR spectroscopy, atomic force microscopy, and transmission electron microscopy confirmed that they were single-chain particles. As part of a plan to possibly prepare the desired strongly phase segregating diblock copolymers by polymer-polymer conjugation using copper catalyzed azide-alkyne cycloaddition, the ATRP of styrene initiated from the popular alkyne functional initiator, prop-2-yn-1-yl 2-brom-2-methylpropanoate (PBiB), was systematically investigated. Using polymerization studies of PBiB a non-degenerative chain coupling side reaction was shown to be occurring. By repeating this study with similar protected alkyne functional ATRP initiators the side reaction was shown to be occurring due to the presence of a terminal alkyne. 1H-NMR studies supported these findings, specifically showing that unprotected terminal alkynes can undergo oxidative alkyne-alkyne coupling under ATRP conditions.
Download or read book Synthesis of Polymer Nanoparticles Using Intramolecular Chain Collapse and Benzocyclobutene Chemistry written by Ajay Ramesh Amrutkar and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Single chain polymer nanoparticle (SCPN) synthesis from different polymer precursors using benzocyclobutene (BCB) chemistry and intramolecular crosslinking was investigated in this study. Synthesis of highly fluorinated SCPNs from highly fluorinated uni-block copolymer precursor utilizing `pseudo-high dilution continuous addition technique' was investigated. GPC confirmed selective intramolecular crosslinking and TEM images supported formation of sub-20 nm spherical polymer nanoparticles. Amphiphilic SCPNs prepared via step-wise crosslinking of an amphiphilic di-block copolymer chain were investigated for their morphology using 4 different characterization techniques: TEM, AFM, DLS and DOSY-NMR. TEM and AFM images showed presence of discreet SCPNs as loosely crosslinked coils that flatten out when deposited on the surface forming pancake like morphology with ̃ 20 nm sizes. All the techniques showed presence of bimodal size distribution of these nanoparticles in solution. A smaller sized distribution represented discreet SCPNs whereas larger sized (>40 nm) distribution represented physical aggregates of SCPNs. These aggregates were broken down upon significantly diluting the solution of nanoparticles (=50 ng/mL). AFM analysis and water contact angle studies on thin films of amphiphilic SCPNs and polystyrene homopolymer blends proved that nanoparticles possess Janus-type morphology. In order to aid synthesis of SCPNs from block copolymer precursors, a new 2-component room temperature polymer crosslinking based on 1-acetoxyBCB containing polymers and a nucleophile was developed. Development of this system involved developing synthesis of new monomer (1-acetoxy-4 and 5-vinylBCB), synthesis of polymers containing this new monomer followed by optimization of their crosslinking reaction. Mechanism of crosslinking and structure of crosslinking unit formed for this crosslinking system was also identified. SCPNs were synthesized at room temperature from uni-block copolymer precursors using this new crosslinking system. Crosslinking reaction was characterized using 1H NMR, GPC and LS-GPC. Symmetric ABA tri-block copolymer precursors are proposed as precursors for synthesis of SCPNs of different morphologies employing intramolecular crosslinking. Initial results on synthesis of ABA tri-block copolymer containing highly immiscible blocks using chain extension approach is also reported.
Download or read book Single Chain Polymer Nanoparticles written by José A. Pomposo and published by John Wiley & Sons. This book was released on 2017-08-18 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first book on this important and emerging topic presents an overview of the very latest results obtained in single-chain polymer nanoparticles obtained by folding synthetic single polymer chains, painting a complete picture from synthesis via characterization to everyday applications. The initial chapters describe the synthetics methods as well as the molecular simulation of these nanoparticles, while subsequent chapters discuss the analytical techniques that are applied to characterize them, including size and structural characterization as well as scattering techniques. The final chapters are then devoted to the practical applications in nanomedicine, sensing, catalysis and several other uses, concluding with a look at the future for such nanoparticles. Essential reading for polymer and materials scientists, materials engineers, biochemists as well as environmental chemists.
Download or read book Submicron Porous Materials written by Paolo Bettotti and published by Springer. This book was released on 2017-02-21 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the latest research on porous materials at the submicron scale and inspires readers to better understand the porosity of materials, as well as to develop innovative new materials. A comprehensive range of materials are covered, including carbon-based and organic-based porous materials, porous anodic alumina, silica, and titania-based sol-gel materials. The fabrication, characterization, and applications of these materials are all explored, with applications ranging from sensors, thermoelectrics, catalysis, energy storage, to photovoltaics. Also of practical use for readers are chapters that describe the basics of porous silicon fabrication and its use in optical sensing and drug delivery applications; how thermal transport is affected in porous materials; how to model diffusion in porous materials; and a unique chapter on an innovative spectroscopic technique used to characterize materials' porosity. This is an ideal book for graduate students, researchers, and professionals who work with porous materials.
Download or read book Materials for Biomedical Engineering Thermoset and Thermoplastic Polymers written by Valentina Grumezescu and published by Elsevier. This book was released on 2019-03-21 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials for Biomedical Engineering: Thermoset and Thermoplastic Polymers presents the newest and most interesting approaches to intelligent polymer engineering in both current and future progress in biomedical sciences. Particular emphasis is placed on the properties needed for each selected polymer and how to increase their biomedical potential in varying applications, such as drug delivery and tissue engineering. These materials are intended for use in diagnoses, therapy and prophylaxis, but are also relatable to other biomedical related applications, such as sensors. Recent developments and future perspectives regarding their use in biomedicine are discussed in detail, making this book an ideal source on the topic. - Highlights the most well-known applications of thermoset and thermoplastic polymers in biological and biomedical engineering - Presents novel opportunities and ideas for developing or improving technologies in materials for companies, those in biomedical industries, and others - Features at least 50% of references from the last 2-3 years
Download or read book Metal Polymer Composites written by John Delmonte and published by Springer. This book was released on 2013-12-21 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polymer Biocatalysis and Biomaterials written by American Chemical Society. Meeting and published by . This book was released on 2005 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Likewise, biomaterials comprise an equally exciting field of research that finds many applications in dental, surgical, and medical areas. Both fields are highly interdisciplinary, requiring (at various times) knowledge and expertise in organic and polymer chemistry, material science, biochemistry, molecular biology, and chemical engineering.
Download or read book Self assembly of Macromolecules written by Anna J. Furth and published by . This book was released on 1986 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Materials for Biomedical Engineering written by Valentina Grumezescu and published by Elsevier. This book was released on 2019-03-25 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials for Biomedical Engineering: Inorganic Micro- and Nanostructures presents recent, specific insights in new progress, along with new perspectives for inorganic micro- and nano-particles. The main focus of this book is on biomedical applications of these materials and how their biological properties are linked to various synthesis methods and their source of raw materials. Recent information regarding optimized synthesis methods to obtain improved nano- and microparticles for biomedical use, as well as the most important biomedical applications of these materials, such as the diagnosis and therapy of cancer, are highlighted in detail. - Provides a valuable resource of recent scientific progress, highlighting the most well-known applications of inorganic micro- and nanostructures in bioengineering - Presents novel opportunities and ideas for developing or improving technologies in composites by companies, biomedical industries, and others - Features at least 50% of its references from the last 2-3 years
Download or read book Nanomaterials in the Environment written by Satinder Kaur Brar and published by ASCE Press. This book was released on 2015-10-01 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text presents the most current knowledge on the environmental impact of materials and products developed using nanotechnology. Although nanomaterials are revolutionising electronics, medicine, transportation and many other industries, they pose risks to living beings and ecosystems that are barely understood. Leading researchers here consider the science of nanomaterials, their behaviour in the environment, risk assessment and toxicology, and the future of nanomaterials.
Download or read book Thermoset Nanocomposites for Engineering Applications written by Rumiana Kotsilkova and published by iSmithers Rapra Publishing. This book was released on 2007 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermoset nanocomposites represent a new technology solution. These new formulations benefit from improved dimensional/thermal stability, flame retardancy and chemical resistance; and have potential applications in marine, industrial and construction markets.This book helps to answer questions related to the design of nanocomposites by controlling the processing technology and structure. The book is addressed not only to researchers and engineers who actively work in the broad field of nanocomposite technology, but also to newcomers and students who have just started investigations in this mul.
Download or read book Peptide Hybrid Polymers written by Harm-Anton Klok and published by Springer. This book was released on 2010-11-25 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1 T.J. Deming: Polypeptide and Polypeptide Hybrid Copolymer Synthesis via NCA Polymerization.- D.W.P.M. Löwik, L. Ayres, J.M. Smeenk, J.C.M. van Hest: Synthesis of Bio-inspired Hybrid Polymers Using Peptide Synthesis and Protein Engineering.- 3 H. Schlaad: Solution Properties of Polypeptide-Based Copolymers.- 4 H.-A. Klok, S. Lecommandoux: Solid State Structure, Organization and Properties of Peptide -Synthetic Hybrid Block Copolymers.- 5 K. Osada, K. Kataoka: Drug and Gene Delivery Based on Supramolecular Assembly of PEG-Polypeptide Hybrid Block Copolymers.-
Download or read book Thermosets written by Qipeng Guo and published by Woodhead Publishing. This book was released on 2017-11-14 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermosets: Structure, Properties, and Applications, Second Edition builds on and updates the existing review of mechanical and thermal properties, as well as rheology and curing processes of thermosets, and the role of nanostructures in thermoset toughening. All chapters have been updated or re-written, and new chapters have been added to reflect ongoing changes and developments in the field of thermosetting materials and the applications of these materials. Applications of thermosets are the focus of the second part of the book, including the use of thermosets in the building and construction industry, aerospace technology and as insulation materials. Thermoset adhesives and coatings, including epoxy resins, acrylates and polyurethanes are also discussed, followed by a review of thermosets for electrical applications. New chapters include coverage of thermoset nanocomposites, recycling issues, and applications such as consumer goods, transportation, energy and defence. With its distinguished editor and international team of expert contributors, the second edition of Thermosets: Structure, Properties, and Applications is an essential guide for engineers, chemists, physicists and polymer scientists involved in the development, production and application of thermosets, as well as providing a useful review for academic researchers in the field. - Links structure, properties, and applications, making this book relevant to both academia and engineers in industry - Includes entirely new chapters on the use of thermosets in aerospace, transport, defense, and a range of consumer applications - Enables practitioners to stay current on the latest developments in recycling of thermosets and their composites
Download or read book Metal Filled Polymers written by S.K. Bhattacharya and published by CRC Press. This book was released on 1986-09-10 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discussing every aspect of the fabrication, properties, and use of metal-filled polymers, this unique single-source reference covers the full range of current and potential applications -- from the insulation to the conduction level. Metal-Filled Polymers describes the most recent experimentation in determining the shielding effectiveness of plastics filled with metal ... compares the advantages of metal fillers over conventional nonmetallic fillers ... delineates the concept of interphase (which has recently found importance in predicting the mechanism of crack growth) ... and shows how the geometry and orientation of filler particles affect conduction, strength, and stiffness under various loading conditions. In addition, the book explains how the filler interacts with the matrix to improve composite properties ... and details the theoretical development of both mechanical and thermal properties. Encompassing the entire literature on their respective topics, contributions by eminent researchers focus on the very latest state-of-the-art data and relate findings directly to practical uses in current technology. Metal-Filled Polymers will prove a vital reference for plastics, materials, process, chemical, design, and mechanical engineers and managers in the plastics and metals industries. It will also be a useful resource for manufacturers of conductive composites for EMI shielding, and professional seminars and graduate-level courses in composite materials. Book jacket.
Download or read book Polymers in Medical Applications written by B.J. Lambert and published by iSmithers Rapra Publishing. This book was released on 2001 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of polymers in medical devices is growing at a steady rate. These materials are generally relatively cheap and versatile, qualities required in many bulk applications. In more specialised medical devices, polymeric components have been developed to meet challenging property and performance requirements. This review describes the process of developing polymeric products for medical applications from design requirements through to specific examples of medical devices and packaging. An additional indexed section containing several hundred abstracts from the Rapra Polymer Library database gives useful references for further reading.
Download or read book Antimicrobial Materials for Biomedical Applications written by Abraham J Domb and published by Royal Society of Chemistry. This book was released on 2019-08-02 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the need to combat emerging infectious diseases, research around antimicrobial biomaterials and their applications is booming. This book provides the field with a much-needed fundamental overview of the science, addressing the chemistry of a broad range of biomaterial types, and their applications in the biomedical industry. Materials covered include polymers, from those with inherent antimicrobial activity to those that release antimicrobial agents, antimicrobial ceramics and inorganic compounds, such as metal based antimicrobial additives, and the developing field of biomimetic materials, are discussed. Surfaces, coatings and adhesives are covered, whilst the applications of these antimicrobial materials in biomedical applications, from catheters to orthopaedics, dentistry to ophthalmology, are explored. Edited by international leaders and with contributions from the best in the field, this book is the go-to resource for graduates and researchers in biomaterials science, biomedical engineering, chemical engineering, and materials and polymer chemistry.
Download or read book Handbook of Thermoset Plastics written by Olga Shepelev and published by Elsevier Inc. Chapters. This book was released on 2013-11-28 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: With recent developments in nanotechnology, thermoset nanocomposites offer numerous advantages compared to conventional composite materials. Moreover, with the emergence of commercial nanomaterials like nanoclays (NCs), carbon nanotubes (CNTs), nanosilica (NS), Polyhedral-Oligomeric-Sil-Sesquioxanes (POSS), tungsten-disulfide (WS2) fullerenes and tubes, and Graphene (Gr), new potential routes have been opened to tailor thermosetting polymers in the nanoscale range. Due to the large surface area of the nanosize particles, only small amounts are needed to cause significant changes in the mechanical, physical, and thermal properties of polymer nanocomposites. When the surface areas of the nanoparticles are modified, additional dimensions for the formulation of structural adhesives and composite matrices arise, and can be used for a variety of applications. The formulation sequence and conditions are found to determine the structure and properties of the resulting nanocomposites. This chapter reviews and analyzes the various thermoset nanocomposites containing: NCs, CNTs, NS, POSS, WS2, and Gr.
