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Synthesis And Characterization Of Functionalized Poly L Lactide Based Materials And Lactone Polymerization Kinetics Using Real Time Atr Ftir Spectroscopy
Download Synthesis And Characterization Of Functionalized Poly L Lactide Based Materials And Lactone Polymerization Kinetics Using Real Time Atr Ftir Spectroscopy full books in PDF, epub, and Kindle. Read online Synthesis And Characterization Of Functionalized Poly L Lactide Based Materials And Lactone Polymerization Kinetics Using Real Time Atr Ftir Spectroscopy ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Synthesis and Characterization of Functionalized Poly (L-lactide)-based Materials and Lactone Polymerization Kinetics Using Real-time ATR-FTIR Spectroscopy by : Jamie Michael Messman
Download or read book Synthesis and Characterization of Functionalized Poly (L-lactide)-based Materials and Lactone Polymerization Kinetics Using Real-time ATR-FTIR Spectroscopy written by Jamie Michael Messman and published by . This book was released on 2004 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comprehensive Study on the Synthesis and Characterization of Bio-based Poly(farnesene) Using Controlled/radical Polymerization by : Sharmaine Luk
Download or read book Comprehensive Study on the Synthesis and Characterization of Bio-based Poly(farnesene) Using Controlled/radical Polymerization written by Sharmaine Luk and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The goal of this doctoral thesis is to understand the polymerization of farnesene (Far) using nitroxide-mediated polymerization (NMP) in several modes of operation (bulk, solution, and aqueous dispersion). The copolymerization of Far with various functionalized methacrylates was investigated to make novel materials that could be used as alternative thermoplastic elastomers (TPEs), processing aids, and impact modifiers. In bulk, Far was statistically copolymerized with an epoxy functionalized methacrylate, glycidyl methacrylate (GMA), and showed that epoxy groups can be incorporated statistically throughout the polymer chain. The tendency to incorporate one monomer versus the other was expressed in their reactivity ratios (rFar = 0.54 ± 0.04 and rGMA = 0.24 ± 0.02). Furthermore, when Dispolreg 007 (D7) was used as the initiator, it possessed a greater ability in maintaining active polymer chain-ends compared to the conventional SG1-based initiator for chain-extension with GMA. In dispersed aqueous media, Far was polymerized by NMP in miniemulsion for the first time, to the best of our knowledge. Stable poly(Far) latex (Mn ~ 24 to 35 kg mol-1) was formed using NMP with particle sizes around 300-400 nm, and successful chain-extension with both styrene and isobornyl methacrylate (iBOMA) indicated active chain-ends despite their high dispersities (Ð > 2.2). Diblock copolymers were made by solution homopolymerization of ethylene glycol dicyclopentenyl methacrylate (EGDEMA) and copolymerization of EGDEMA and iBOMA using D7, followed by chain-extension with Far. Both poly(EGDEMA-b-Far) and poly(EGDEMA-co-iBOMA-b-Far) successfully underwent thiol-ene clicking chemistry to attach thiol-POSS groups onto the polymer chain. Incorporation of POSS (
Book Synopsis Kinetic Investigations of the Controlled/living Polymerization of Isobutylene Via in Situ Real-time ATR-FTIR Spectroscopy by : Andrew Bradley Donnalley
Download or read book Kinetic Investigations of the Controlled/living Polymerization of Isobutylene Via in Situ Real-time ATR-FTIR Spectroscopy written by Andrew Bradley Donnalley and published by . This book was released on 1999 with total page 304 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 2015-12-08 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitroxide-mediated polymerization is an important branch of controlled radical polymerization, which has revolutionised the preparation of polymer architectures and compositions. This is the first book dedicated to the topic and covers the history and development of nitroxide-mediated polymerization, as well as current techniques of academic and industrial interest. Nitroxide-Mediated Polymerization gathers together and comprehensively discusses all aspects of nitroxide-mediated polymerization, from fundamental principles through to industrial applications. A specific focus will be dedicated to the principle of the technique, its kinetics aspects, the synthesis of the controlling agents, the range of polymerizable monomers, its potential for preparation of advanced organic and hybrid materials and its status at the industrial stage. The book details all stages of the field, with chapters detailing the history, recent developments and novel materials in this fast developing area. Edited and written by expert researchers working in the field and academia this book focuses on highlighting the kinetic aspects of nitroxide-mediated polymerization, providing insight into the kinetics that can sometimes be hard to follow in published papers. The book will be of interest to polymer chemists and materials scientists at graduate level and above.
Book Synopsis Stereocontrolled Ring-opening Polymerization of Lactide Monomers by Lewis-acidic Metal Complexes by : Andreas Kapelski
Download or read book Stereocontrolled Ring-opening Polymerization of Lactide Monomers by Lewis-acidic Metal Complexes written by Andreas Kapelski and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Highly Functionalized Carbon-chain Polymers by : Lawino C. Kagumba
Download or read book Synthesis and Characterization of Highly Functionalized Carbon-chain Polymers written by Lawino C. Kagumba and published by . This book was released on 2001 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis of Polymers and Copolymers of Lactide Through Titanium Initiators by :
Download or read book Synthesis of Polymers and Copolymers of Lactide Through Titanium Initiators written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The research described in this thesis explored the synthesis and characterisation of biocompatible and biodegradable polymers of lactide through non-toxic titanium alkoxide initiators. The research objectives focused on the preparation of polylactides in both solvent and solventless media, to produce materials with a wide range of molecular weights. The objectives of this research were also focused on the enhancement of the flexibility of the polymer chains by synthesising random and block copolymers of lactide and e-caprolactone using Ti(O-i-Pr)4 as an initiator. This work involved extensive characterisation of the synthesised copolymers using gel permeation chromatography and 1H and 13C NMR spectroscopic analysis. Kinetic studies of the ring opening polymerisation of e-caprolactone and of the copolymerisation of lactide and e-caprolactone with Ti(O-i-Pr)4 as an initiator were also carried out. The last section of this work involved the synthesis of block and star-shaped copolymers of lactide and poly(ethylene glycol) [PEG]. The preparation of lactide/PEG block copolymers was carried out by ring opening polymerisation of L-lactide using Ti(O-i-Pr)4 as an initiator and hydroxyl-terminated PEG's with different numbers of hydroxyl groups as co-initiators both in solution and solventless media. These all-in-one polymerisations yielded the synthesis of both lactide homopolymer and lactide/PEG block copolymers. In order to selectivity synthesise copolymers of lactide and PEG, the experiment was carried out in two steps. The first step consisted of the synthesis of a titanium macro-initiator by exchanging the iso-propoxide ligands by PEG with different numbers of hydroxyl groups. The second step involved the ring opening polymerisation of lactide using the titanium macrocatalyst that was prepared as an initiator. The polymerisations were carried out in a solventless media. The synthesis of lactide/PEG copolymers using polyethylene glycol with amino terminal groups was also discussed.
Book Synopsis Kinetic Investigations of the BC13 Co-initiated Carbocationic Polymerization of Isobutylene by Real-time ATR-FTIR Spectroscopy by : Thomas Louis Maggio
Download or read book Kinetic Investigations of the BC13 Co-initiated Carbocationic Polymerization of Isobutylene by Real-time ATR-FTIR Spectroscopy written by Thomas Louis Maggio and published by . This book was released on 1999 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Polymers Incorporating N-alkyl Urea-peptoid Sequences by : Xiaoping Chen
Download or read book Synthesis and Characterization of Polymers Incorporating N-alkyl Urea-peptoid Sequences written by Xiaoping Chen and published by . This book was released on 2013 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation is mainly based on the works of synthesis and characterization of polymer/N-alkyl urea peptoid hybrid materials. Polymers were synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization using thrithiocarbonate and dithiocarbonate chain transfer agents in controlled manner. Poly(N-alkyl urea peptoid) was synthesized via step growth polymerization using symmetric diamine and diisocyanate. N-Alkyl urea peptoid sequences up to sixmer were synthesized through three steps repetition cycles in good yields. Several different hybrid polymeric materials were explored combining the three different material synthetic strategies including polymer conjugates shown in chapter 2, molecular brushes shown in chapter 3, water soluble A-B-A triblock copolymer shown in chapter 4. Firstly, two well-defined statistical copolymers poly(styrene-co-3-azidopropyl methacrylate) and poly(3-O-methacryloyl-1,2:5,6-di-O-isopropylidene-[subscript D]-glucofuranose -co-AzPMA) were synthesized by RAFT. An exemplary N-alkyl urea peptoid trimer was synthesized and conjugated to the two copolymers through the 'click' reaction of the azide pendent group of polymers with the complilanry alkene group at N-alkyl urea peptoid. The polymer conjugates were subjected to further post-modification to generated fluorescent conjugates or water soluble materials. Following the explore of conjugation, N-alkyl urea peptoid was used as comonomer to synthesize linear poly(N-alkyl urea peptoid). The RAFT agent was introduced onto the linear polymer generated by step growth polymerization once again through 'click' reaction. Sequentially, styrene and tert-butyl acrylate was grown from RAFT agents sites that fused onto the poly(N-alkyl urea peptoid) backbone to make block copolymer arms. Upon removal of the tert-butyl groups, the molecular brushes were observed to generate micelles in aqueous solution. The self-assembly N-alkyl urea peptoid was then investigated and conjugated to water soluble polymer poly(ethylene glycol) to produce a A-B-A block copolymer that self-assembled into ribbons in aqueous solution. The final two part of dissertation was about gelling materials studies starting with presenting a synthesis strategy for low molecular weight organogelators (LMOG) using the ureidopyrimidinone (UPy) group functioned N-alkyl urea peptoid. The surprising observation of gelation in DMSO led to extensive investigation of the gelification mechanism studies. Based on the lessons of LMOG, the copolymerization of different T[subscript g] monomers with quadruple hydrogen bonding containing methacrylate was demonstrated suitable to produce polymeric organogelators in the final chapter.
Book Synopsis Synthesis and Characterization of Self-assembling Polymers Using Hydrogen Bonding Or Hydrophobic Effect by : Xinjun Yu
Download or read book Synthesis and Characterization of Self-assembling Polymers Using Hydrogen Bonding Or Hydrophobic Effect written by Xinjun Yu and published by . This book was released on 2015 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation is mainly based on the works of synthesis and characterization of self-assembling polymers using hydrogen bonding or hydrophobic interactions. Firstly, N-alkyl urea peptoid oligomer was synthesized as backbone of supramolecular polymers through three step repetition cycles with high yield. One N-alkyl urea peptoid precursor was explored to simplify the synthetic process. 4 different functional groups were converted from one precursor. Then 2-ureido-4[1H]-pyrimidinone (UPy) group which is a quadruple hydrogen bonding system was incorporated to N-alkyl urea peptoid oligomers to generate supramolecules. With the experience of UPy unit, we further explored UPy containing monomer to make organogelators. Three different monomers with different Tg values were copolymerized using reversible addition-fragmentation chain-transfer (RAFT) polymerization. Organogels were afforded in both chloroform and dichlorobenzene. Critical gelation concentration and mechanic properties of organogels were examined. Cooperating another novel monomer containing pyrene unit to the above copolymers, fluorescent organogels were achieved which were suitable for potential up-conversion applications. In addition to pyrene, anthracene is another molecule which shows great up-conversion property. A series of Poly[(9-anthrylmethyl methacrylate)-co-(methyl methacrylate)] (Poly(AnMMA-co-MMA)) with different AnMMA ratios were synthesized via RAFT polymerization, resulting in tunable inter-chromophore distances. These polymers can serve as emitters, with PtOEP as sensitizer, in triplet-triplet annihilation up-conversion (TTA-UC) systems. TTA-UC intensity of the Poly(AnMMA-co-MMA)/PtOEP mixtures displays interesting dependence on the AnMMA ratio in the polymer. Interactions between chromophores on the same polymer chain play the key role in affecting the TTA-UC intensity in these systems. It is critical to minimize intra-chain chromophore quenching in order to achieve high UC intensity. Hydrophobic effect was used to obtain a hybrid photosensitizer. By integrating amphiphilic block copolymer poly(N-isopropylacrylamide-b-styrene) (PNIPAAm-b-styrene) stabilized silver nanoparticles (Ag NPs) with hematoporphyrin (HP), HP was trapped by polystyrene block through hydrophobic effects. Hydrophilic block can increase the solubility of this photosensitizer in aqueous solution. This hybrid photosensitizer was demonstrated to enhance singlet oxygen production. Finally, a self-immolative polymer was made with a kinetically stable polymer backbone, whose chain end can respond to external stimulus by triggering a head-to-tail depolymerizaiton. Electrospining was used to fabricate nano-scale fibers which can be utilized in potential drug delivery system.
Book Synopsis Single-Chain Polymer Nanoparticles by : José A. Pomposo
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.
Book Synopsis Synthesis and Characterization of Nucleobase Functionalized Polymers by : Lowie Maes
Download or read book Synthesis and Characterization of Nucleobase Functionalized Polymers written by Lowie Maes and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fundamental Polymer Science by : Ulf W. Gedde
Download or read book Fundamental Polymer Science written by Ulf W. Gedde and published by Springer Nature. This book was released on 2019-12-20 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: This successor to the popular textbook, “Polymer Physics” (Springer, 1999), is the result of a quarter-century of teaching experience as well as critical comments from specialists in the various sub-fields, resulting in better explanations and more complete coverage of key topics. With a new chapter on polymer synthesis, the perspective has been broadened significantly to encompass polymer science rather than “just” polymer physics. Polysaccharides and proteins are included in essentially all chapters, while polyelectrolytes are new to the second edition. Cheap computing power has greatly expanded the role of simulation and modeling in the past two decades, which is reflected in many of the chapters. Additional problems and carefully prepared graphics aid in understanding. Two principles are key to the textbook’s appeal: 1) Students learn that, independent of the origin of the polymer, synthetic or native, the same general laws apply, and 2) students should benefit from the book without an extensive knowledge of mathematics. Taking the reader from the basics to an advanced level of understanding, the text meets the needs of a wide range of students in chemistry, physics, materials science, biotechnology, and civil engineering, and is suitable for both masters- and doctoral-level students. Praise for the previous edition: ...an excellent book, well written, authoritative, clear and concise, and copiously illustrated with appropriate line drawings, graphs and tables. - Polymer International ...an extremely useful book. It is a pleasure to recommend it to physical chemists and materials scientists, as well as physicists interested in the properties of polymeric materials. - Polymer News This valuable book is ideal for those who wish to get a brief background in polymer science as well as for those who seek a further grounding in the subject. - Colloid Polymer Science The solutions to the exercises are given in the final chapter, making it a well thought-out teaching text. - Polymer Science
Book Synopsis Synthesis and Characterization of Nucleobase Functionalized Polymers by : Lowie Maes (Doctor of Sciences: Chemistry)
Download or read book Synthesis and Characterization of Nucleobase Functionalized Polymers written by Lowie Maes (Doctor of Sciences: Chemistry) and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Poly(arylene Ethers) and Functionalized Oligomers by : Michael J. Jurek
Download or read book Synthesis and Characterization of Poly(arylene Ethers) and Functionalized Oligomers written by Michael J. Jurek and published by . This book was released on 1987 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Functionalized Polymers by : Narendra Pal Singh Chauhan
Download or read book Functionalized Polymers written by Narendra Pal Singh Chauhan and published by CRC Press. This book was released on 2021-05-14 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Functionalized polymers are macromolecules to which chemically bound functional groups are attached which can be used as catalysts, reagents, protective groups, etc. Functionalized polymers have low cost, ease of processing and attractive features for functional organic molecules. Chemical reactions for the introduction of functional groups in polymers and the conversion of functional groups in polymers depend on different properties. Such properties are of great importance for functionalization reactions for possible applications of reactive polymers. This book deals with the synthesis and design of various functional polymers, the modification of preformed polymer backbones and their various applications.
Book Synopsis Synthesis of End-chain and In-chain Functionalized Polymers by Anionic Polymerization by : Michael Olechnowicz
Download or read book Synthesis of End-chain and In-chain Functionalized Polymers by Anionic Polymerization written by Michael Olechnowicz and published by . This book was released on 2008 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The synthesis of homopolymers and block copolymers containing metal coordinating ligands is an important area of research due to the potential applications of these polymers in the fields of optics, electronics, and photonics. Specifically, the terpyridine group is very useful, since it can act as a tridentate chelating ligand due to its strategically positioned, three nitrogen atoms. This allows it to form strong complexes with a variety of transition metal ions. The hydroxyl functionality is another important group due to numerous applications of well-defined hydroxyl-functionalized polymers. They can react with other functional groups on other polymers for chain extension, branching, or crosslinking. They can also be used as macroinitiators for the polymerization of other monomers such as lactide and lactone. Alkyllithium-initiated, living anionic polymerization offers excellent control over molecular weight and molecular weight distribution. The absence of termination and chain transfer steps makes these systems ideally suited for the preparation of chain-end functionalized polymers by the reaction of the living chain ends with appropriate monomers or terminating agents. A recently reported general anionic functionalization method was used to create well-defined terpyridine and hydroxyl end-functionalized polymers. In the first step, living polymeric organolithium compounds were reacted with silyl chlorides to form the corresponding silyl hydride-functionalized polymers. Then, these polymers were reacted with substituted alkenes in the presence of a hydrosilation catalyst to form the corresponding functionalized polymers. A new method was also developed, based on similar chemistry, to prepare an in-chain functionalized diblock copolymer where a variety of functional groups can be placed directly at the interface of the two blocks. This method was used to prepare both in-chain hydroxyl- and terpyridine-functionalized polystyrene-b-polyisoprene copolymers. Lewis bases effect dramatic changes in microstructure, initiation rates, propagation rates and monomer reactivity ratios for alkyllithium-initiated polymerizations of vinyl monomers in hydrocarbon solution. The stability of polymeric organolithium compounds and the mechanism of decomposition in the presence of various stoichiometric equivalents of tetrahydrofuran in benzene solutions were studied due the importance of THF as an additive."--Abstract.
