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Development Of Novel Functionalized Bis Nitroxide Initiators For The Preparation Of Designed Polymers
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Book Synopsis Development of Novel Functionalized Bis-nitroxide Initiators for the Preparation of Designed Polymers by : Nicole Lyn Hill
Download or read book Development of Novel Functionalized Bis-nitroxide Initiators for the Preparation of Designed Polymers written by Nicole Lyn Hill and published by . This book was released on 2007 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nitroxide Mediated Polymerization by : Didier Gigmes
Download or read book Nitroxide Mediated Polymerization written by Didier Gigmes and published by Royal Society of Chemistry. This book was released on 2016 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book dedicated to nitroxide-mediated polymerization and covers the history and development of NMP, as well as current techniques of academic and industrial interest.
Download or read book Nitroxides written by Olivier Ouari and published by Royal Society of Chemistry. This book was released on 2021-05-13 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitroxides are versatile small organic molecules possessing a stabilised free radical. With their unpaired electron spin they display a unique reactivity towards various environmental factors, enabling a diverse range of applications. They have uses as synthetic tools, such as catalysts or building blocks; imaging agents and probes in biomedicine and materials science; for medicinal antioxidant applications; and in energy storage. Polynitroxides (polymers bearing pendant nitroxide sidechains) have been used in organic radical batteries, oxidation catalysts and in exchange reactions for constructing complex architectures. Chapters in this book cover the synthesis of nitroxides, EPR studies and magnetic resonance applications, physiochemical studies, and applications including in batteries, imaging and organic synthesis. With contributions from leaders in the field, Nitroxides will be of interest to graduate students and researchers across chemistry, physics, biology and materials science.
Book Synopsis Synthesis of Highly Functionalized Polymers by : RI Chen
Download or read book Synthesis of Highly Functionalized Polymers written by RI Chen and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Highly functionalized polymers represent a broad family of polymers with multiple functionalities attached to each repeat unit in the backbone. These can be small molecule functional groups or polymer sidechains grown or grafted from these functional groups. The latter leads to a class of polymers defined as comb polymers. This type of structure enforces a highly stretched conformation of the polymer backbone and imparts unique properties due to low inter chain entanglement and low entropic penalty for self-assembly. The comb polymers have a diverse set of architectures and compositions with potential applications in surface modification, resin formulation and nanopatterning. To realize this potential, efficient, versatile and easy-to-handle synthetic methods need to be constantly evolved. This dissertation focuses on the synthesis of comb polymers based on a new monomer and the application of multi-component reactions to reduce synthetic complexity. The first part of this dissertation focuses on the design of a benign formamide monomer capable of undergoing isocyanide-based multi-component reaction. The synthesis, polymerizability, reactivity and stability of this monomer is studied, along with its utility in the synthesis of comb polymers. Specifically, a difunctional polymerizable initiator (Y-inimer) that can be used for two tandem controlled polymerizations is designed from the formamide monomer. The utility of this Y-inimer is demonstrated through the synthesis of a comb polymer with 1:1 ratio of A and B chains, and A/B mixed polymer brushes from a substrate where intimate contact between the A and B chains is beneficial for exploring polyelectrolyte behavior. Finally, a comb polymer-based block copolymer additive is explored for synergistically improving the toughness and strength of a 3D printable epoxy resin. The main contribution of this dissertation lies in the 1) design of benign monomer that can be used in isocyanide-based multicomponent reactions to design highly functional polymers, without having to directly handle the isocyanide, 2) development of a dualfunctional polymerizable initiator for the synthesis of comb polymers with exact 1:1 ratio of A and B sidechains, and 3) development of a comb polymer additive for toughening of epoxy resin without loss of modulus or rheological properties.
Book Synopsis The Design, Synthesis and Testing of N-alkoxy Amine Initiators for Nitroxide-mediated 'living' Free Radical Polymerization by : Aaron Nilsen
Download or read book The Design, Synthesis and Testing of N-alkoxy Amine Initiators for Nitroxide-mediated 'living' Free Radical Polymerization written by Aaron Nilsen and published by . This book was released on 2005 with total page 1088 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Functionalized Polymers Using Bis(phenoxyimine)titanium and [alpha]-diimineNickel(II) Catalysts for the Production of New Polyolefin Architectures by : Amelia Marie Anderson
Download or read book Development of Functionalized Polymers Using Bis(phenoxyimine)titanium and [alpha]-diimineNickel(II) Catalysts for the Production of New Polyolefin Architectures written by Amelia Marie Anderson and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Decades of research in the area of metal-catalyzed olefin polymerization, since the initial discoveries by Ziegler and Natta in the 1950s, has lead to the development of a wide variety of transition metal catalysts as well as numerous polymer architectures. Although early work in the field focused on heterogeneous catalysis, Kaminsky's discovery of the scavenger/activator methylaluminoxane in 1980 facilitated a renaissance in the area of homogeneous catalysts. Today, many commercial polyolefin materials are still limited to linear homopolymers, random copolymers, or blends thereof. Therefore, our efforts have focused on the endfunctionalization and random incorporation of polar functional groups into polyolefins to produce polymers with improved properties and more complex architectures than traditional linear polymers. Initial work in this area focused on the development of well-defined long-chain branched polymers from end-functionalized polypropylene. Although many star polymers have been produced using anionic, cationic and radical methods, semicrystalline polypropylene materials with similar structures from coordinationinsertion polymerization were not known. Using a non-living bis(phenoxyimine)titanium catalyst, allyl-terminated syndiotactic polypropylene was produced and utilized in the production of alcohol-, azide- and amine-terminated polymers. These end-functionalized macromolecules were employed in the synthesis of a variety of well-defined branched polymers including star, miktoarm star and H- polymers. In an effort to produce branched polyolefin materials with high molecular weight, a norbornene-terminated polymer was synthesized from the allyl-terminated syndiotactic polypropylene. Using ring-opening metathesis polymerization, a number of high molecular weight polypropylene comb polymers were produced. All of the branched, syndiotactic polypropylene materials were analyzed further in an effort to related branching with observed polymer properties. To produce polyolefins with improved properties, a series of random copolymers derived from propylene and a polar, hydrogen bonding monomer were produced using Ni(II) [alpha]-diiminecatalysts. By varying the reaction temperature, hydrogen bonding polypropylene materials with a range of microstructures were produced. At high reaction temperatures, regioirregular, amorphous polypropylene was obtained, whereas, decreasing reaction temperature lead to highly regioregular, isotactic polypropylene. Utilizing the living nature of the Ni(II) [alpha]-diiminecatalysts, a series of triblock copolymers containing hydrogen bonding moieties in the midblock were also produced. The mechanical properties of all materials were investigated and generally observed to improve upon incorporation of small amounts (~1%) of the ureidopyrimidinone. For the branched and hydrogen bonding polymer reported herein, functionalization of polypropylene allowed for the synthesis of new polyolefin architectures.
Book Synopsis Novel Metathesis Chemistry: Well-Defined Initiator Systems for Specialty Chemical Synthesis, Tailored Polymers and Advanced Material Applications by : Y. Imamoglu
Download or read book Novel Metathesis Chemistry: Well-Defined Initiator Systems for Specialty Chemical Synthesis, Tailored Polymers and Advanced Material Applications written by Y. Imamoglu and published by Springer. This book was released on 2003-11-30 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive discussion of the theory, practice and application of catalytically active transition metal species and their application in the production of specialist polymeric materials. The material is presented in a progressive manner, suitable for non-experts and those seeking an introduction to the field. The bibliographies supplied are complete and up to date, making the book an indispensable guide to the primary literature for the more theoretical background to the topics discussed. After a comprehensive discussion of initiating systems for speciality chemical synthesis the book goes on to deal with a wide range of topics in materials science, including: alkenamers, polyacetylenes, industrial applications and liquid rocket engine fuels.
Book Synopsis Anionic Synthesis of Functionalized Polymers Using Functionalized Organolithium Initiators by : Sung Hoon Jang
Download or read book Anionic Synthesis of Functionalized Polymers Using Functionalized Organolithium Initiators written by Sung Hoon Jang and published by . This book was released on 1997 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preparation and Evaluation of Novel Initiators for the Thermally Mild Living and Controlled Free Radical Polymerization of Methacrylates by : Omari E Ansong
Download or read book Preparation and Evaluation of Novel Initiators for the Thermally Mild Living and Controlled Free Radical Polymerization of Methacrylates written by Omari E Ansong and published by . This book was released on 2008 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: A number of nitroxide adducts and N-acyloxytrialkylammonium salts were prepared, isolated, characterized and evaluated as initiators for the controlled and living free radical polymerization of methacrylate and dimethacrylate monomers under mildly thermal and photochemical conditions. The initiators and polymerization methods that were developed could potentially be used for improving resins employed in dental applications. Using very easy synthesis strategies, the following nitroxide initiators were prepared in high purity, isolated and characterized: 1-Benzoylperoxy-2,2,6,6-tetramethyl-piperidine (BPO/TEMPO), 1-(2'-Cyano-2'-propoxy)-2,2,6,6-tetramethylpiperidine (AIBN/TEMPO), 1,1-ditertbutyl-1-(1-methyl-1-cyanoethoxy)-amine (AIBN/DBN), 1,1-ditertbutyl-1-(benzoylperoxy)-amine (BPO/DBN) and 2,2,6,6,-tetramethyl-4-oxo-1-(1-methyl-1-cyanoethoxy)-piperidine (AIBN/4-OXO-TEMPO). Using H2SO4 additive and an improved unimolecular initiation in nitroxide mediated polymerization, living and controlled polymerization of methyl methacrylate (MMA), tri-ethylene glycol dimethacrylate (TEGDMA) and ethoxylated bisphenol A dimethacrylate (EBPADMA) were accomplished, for the first time ever for most of the initiators. Linear polymers (PMMA) were produced in high yield (93 %) under mildly thermal conditions (T = 70 oC) and with excellent attributes: (PDI = 1.04-1.26), Mn (87000), Tg (122-128 oC), Td (290-410 oC). Highly crosslinked polymers, poly(TEGDMA) and poly(EBPADMA), were produced in high yield (100 %) with Td (350-400 oC). The initiators were stable for a year and half at 0 oC. Two routes were investigated for the preparation of N-acyloxytrialkylammonium salts. The more efficient of these routes was used to make several novel analogs of the salts. The salts were evaluated for the free radical polymerization of MMA, TEGDMA and EBPADMA under mildly thermal (T = 60 oC) conditions with and without H2SO4 additive. Polymerization rate, yield and polymer attributes all improved upon application of H2SO4 additive. PMMA was produced with excellent attributes (PDI = 1.01-1.06), Mn (96,000-122000), Td (330-385) and Tg (127-134). Highly crosslinked poly(TEGDMA) and poly(EBPADMA) were produced with Td ranges of 300-374 oC and 375-411 oC respectively.
Book Synopsis Self-Healing Polymers by : Wolfgang H. Binder
Download or read book Self-Healing Polymers written by Wolfgang H. Binder and published by John Wiley & Sons. This book was released on 2013-03-29 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-healing is a well-known phenomenon in nature: a broken bone merges after some time and if skin is damaged, the wound will stop bleeding and heals again. This concept can be mimicked in order to create polymeric materials with the ability to regenerate after they have suffered degradation or wear. Already realized applications are used in aerospace engineering, and current research in this fascinating field shows how different self-healing mechanisms proven successful by nature can be adapted to produce even more versatile materials. The book combines the knowledge of an international panel of experts in the field and provides the reader with chemical and physical concepts for self-healing polymers, including aspects of biomimetic processes of healing in nature. It shows how to design self-healing polymers and explains the dynamics in these systems. Different self-healing concepts such as encapsulated systems and supramolecular systems are detailed. Chapters on analysis and friction detection in self-healing polymers and on applications round off the book.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Porous Polymers by : Michael S. Silverstein
Download or read book Porous Polymers written by Michael S. Silverstein and published by John Wiley & Sons. This book was released on 2011-02-14 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the various aspects of the porous polymer field into one volume. It not only presents a fundamental description of the field, but also describes the state of the art for such materials and provides a glimpse into the future. Emphasizing a different aspect of the ongoing research and development in porous polymers, the book is divided into three sections: Synthesis, Characterization, and Applications. The first part of each chapter presents the basic scientific and engineering principles underlying the topic, while the second part presents the state of the art results based on those principles. In this fashion, the book connects and integrates topics from seemingly disparate fields, each of which embodies different aspects inherent in the diverse field of porous polymeric materials.
Book Synopsis Polymer Functionalized Graphene by : Arun Kumar Nandi
Download or read book Polymer Functionalized Graphene written by Arun Kumar Nandi and published by Royal Society of Chemistry. This book was released on 2021-06-18 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is an immense variety of research on polymer functionalized graphene (PFG). Functionalization of graphene is necessary for improvement of the compatibility with polymers. Applications of these graphene polymer hybrids include in chemical and biological sensing, photovoltaic devices, supercapacitors and batteries, dielectric materials and drug/gene delivery vehicles. This book will shed light on the synthesis, properties and applications of these new materials, covering two methods (covalent and noncovalent) for producing polymer functionalized graphene. Chapters cover physical, optical, mechanical and electronic properties, applications of polymer functionalized graphene in energy harvesting and storage, and uses in biomedicine and bioengineering. Written by an expert in the field, Polymer Functionalized Graphene will be of interest to graduate students and researchers in polymer chemistry and nanoscience.
Book Synopsis Preparation of Telechelic Polymers Via Nitroxide Mediated Polymerization by : Gregory J. O'Bryan
Download or read book Preparation of Telechelic Polymers Via Nitroxide Mediated Polymerization written by Gregory J. O'Bryan and published by . This book was released on 2007 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Chemistry of Radical Polymerization by : Graeme Moad
Download or read book The Chemistry of Radical Polymerization written by Graeme Moad and published by Elsevier. This book was released on 2006 with total page 667 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book commences with a general introduction outlining the basic concepts of radical polymerization. This is followed by a chapter on radical reactions that is intended to lay the theoretical ground-work for the succeeding chapters on initiation, propagation and termination.
Book Synopsis Functional Polymers by Reversible Deactivation Radical Polymerisation by : Nikhil K Singha
Download or read book Functional Polymers by Reversible Deactivation Radical Polymerisation written by Nikhil K Singha and published by Smithers Rapra. This book was released on 2017-03-30 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthesis of tailor-made functional polymers with controlled architecture is very challenging. The functional groups present in the monomer often either prevent polymerisation or lead to several side reactions. In this regard, reversible deactivation radical polymerisation (RDRP) techniques are useful tools to prepare macromolecular architectures with controlled molecular weight, architecture, and narrow dispersity. This book delineates the advances in the area of RDRP to prepare functional polymers for a wide range of applications like in self-healing, oil- and water-resistant coatings, controlled drug delivery systems and so on. The worthy contribution from renowned experts working in the area of RDRP makes this book invaluable to researchers in these important areas such as:Introduction and historical development of RDRP.Polymer-nanohybrid materials.Telechelic polymers with controlled end functionality.Functional polymers via a combination of RDRP and 'click' chemistry.Fluorinated polymers.Polymers for biomedical applications.The book will be of prime interest for polymer scientists as well as material scientists dealing with functional polymer synthesis for different applications. It will also be a good source of knowledge for researchers working on functional polymeric materials and their composites.
Book Synopsis Papers Presented at the ... Meeting by : American Chemical Society. Division of Polymer Chemistry
Download or read book Papers Presented at the ... Meeting written by American Chemical Society. Division of Polymer Chemistry and published by . This book was released on 1998 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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