Synthesis And Characterisation Of Novel Ionic Block Copolymers
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Synthesis And Characterisation Of Novel Ionic Block Copolymers
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Author : Andrew Brian Lowe
language : en
Publisher:
Release Date : 1997
Synthesis And Characterisation Of Novel Ionic Block Copolymers written by Andrew Brian Lowe and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Synthesis And Characterization Of Neutral Ionic Block Copolymers Of Various Architectures
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Author : Jin Chuan Yang
language : en
Publisher:
Release Date : 2001
Synthesis And Characterization Of Neutral Ionic Block Copolymers Of Various Architectures written by Jin Chuan Yang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Block copolymers categories.
Block Copolymers In Nanoscience
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Author : Massimo Lazzari
language : en
Publisher: John Wiley & Sons
Release Date : 2007-06-27
Block Copolymers In Nanoscience written by Massimo Lazzari and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-06-27 with Technology & Engineering categories.
This first book to take a detailed look at one of the key focal points where nanotechnology and polymers meet provides both an introductory view for beginners as well as in-depth knowledge for specialists in the various research areas involved. It investigates all types of application for block copolymers: as tools for fabricating other nanomaterials, as structural components in hybrid materials and nanocomposites, and as functional materials. The multidisciplinary approach covers all stages from chemical synthesis and characterization, presenting applications from physics and chemistry to biology and medicine, such as micro- and nanolithography, membranes, optical labeling, drug delivery, as well as sensory and analytical uses.
Synthesis And Characterization Of Smart Block Copolymers For Biomineralization And Biomedical Applications
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Author :
language : en
Publisher:
Release Date : 2008
Synthesis And Characterization Of Smart Block Copolymers For Biomineralization And Biomedical Applications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Self-assembly is a powerful tool in forming structures with nanoscale dimensions. Self-assembly of macromolecules provides an efficient and rapid pathway for the formation of structures from the nanometer to micrometer range that are difficult, if not impossible to obtain by conventional lithographic techniques [1]. Depending on the morphologies obtained (size, shape, periodicity, etc.) these self-assembled systems have already been applied or shown to be useful for a number of applications in nanotechnology [2], biomineralization [3, 4], drug delivery [5, 6] and gene therapy [7]. In this respect, amphiphilic block copolymers that self-organize in solution have been found to be very versatile [1]. In recent years, polymer-micellar systems have been designed that are adaptable to their environment and able to respond in a controlled manner to external stimuli. In short, synthesis of 'nanoscale objects' that exhibit 'stimulus-responsive' properties is a topic gathering momentum, because their behavior is reminiscent of that exhibited by proteins [8]. By integrating environmentally sensitive homopolymers into amphiphilic block copolymers, smart block copolymers with self assembled supramolecular structures that exhibit stimuli or environmentally responsive properties can be obtained [1]. Several synthetic polymers are known to have environmentally responsive properties. Changes in the physical, chemical or biochemical environment of these polymers results in modulation of the solubility or chain conformation of the polymer [9]. There are many common schemes of engineering stimuli responsive properties into materials [8, 9]. Polymers exhibiting lower critical solution temperature (LCST) are soluble in solvent below a specific temperature and phase separate from solvent above that temperature while polymers exhibiting upper critical solution temperatures (UCST) phase separate below a certain temperature. The solubility of polymers with ionizable moieties depends on the pH of the solution. Polymers with polyzwitterions, anions and cations have been shown to exhibit pH responsive self assembly. Other stimuli responsive polymers include glucose sensitive polymers, calcium ion-sensitive polymers and so on. Progress in living radical polymerization (LRP) methods [10] has made it possible for the facile synthesis of these block copolymer systems with controlled molecular weights and well defined architectures. The overall theme of this work is to develop novel smart block copolymers for biomineralization and biomedical applications. Synthesis and characterization of self-assembling thermoreversible ionic block copolymers as templates in biomimetic nanocomposite synthesis using a bottom-up approach is a novel contribution in this respect. Further, we have extended these families of copolymers to include block copolymer-peptide conjugates to enhance biological specificity. Future directions on this work will focus on enhancing the polymer templating properties for biomineralization by expanding the family of block copolymers with organic polypeptides and biological polypeptide scaffolds as well as a detailed understanding of the polymer-inorganic nanocomposites at the molecular level using small angle scattering analysis. Glucose responsive polymer hydrogels for drug delivery, polymer-ligand conjugates for non-viral therapy and thermoresponsive injectable photocrosslinkable hydrogels for posttraumatic arthritis cartilage healing are other applications of these novel copolymers synthesized in our work.
Handbook Of Polymer Synthesis Characterization And Processing
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Author : Enrique Saldivar-Guerra
language : en
Publisher: John Wiley & Sons
Release Date : 2013-02-28
Handbook Of Polymer Synthesis Characterization And Processing written by Enrique Saldivar-Guerra and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-02-28 with Technology & Engineering categories.
Covering a broad range of polymer science topics, Handbook of Polymer Synthesis, Characterization, and Processing provides polymer industry professionals and researchers in polymer science and technology with a single, comprehensive handbook summarizing all aspects involved in the polymer production chain. The handbook focuses on industrially important polymers, analytical techniques, and formulation methods, with chapters covering step-growth, radical, and co-polymerization, crosslinking and grafting, reaction engineering, advanced technology applications, including conjugated, dendritic, and nanomaterial polymers and emulsions, and characterization methods, including spectroscopy, light scattering, and microscopy.
Synthesis And Characterization Of Some Novel Block Copolymers
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Author : Brian Carl Auman
language : en
Publisher:
Release Date : 1987
Synthesis And Characterization Of Some Novel Block Copolymers written by Brian Carl Auman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with categories.
Synthesis And Characterization Of Ionically Bonded Diblock Copolymers
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Author : Lei Feng (Chemical engineer)
language : en
Publisher:
Release Date : 2013
Synthesis And Characterization Of Ionically Bonded Diblock Copolymers written by Lei Feng (Chemical engineer) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Diblock copolymers categories.
Block copolymers consist of two or more incompatible polymer chains linked by covalent bonds. These block copolymer can separate into nanometer sized domains whose morphology depends upon the size of the block and interactions between them. The properties of block copolymers can be modified and potentially improved by introducing noncovalent interactions to replace covalent linkages between blocks to form supramolecular block copolymers. These kinds of materials combine the microphase separation inherent to block copolymers with the facile synthesis of supramolecular materials thereby affording new and unique materials. This dissertation focuses on synthesis and characterization of PS-b-PMA block copolymers with ion-pair junctions.Firstly, the chain-end sulfonated polystyrene ([omega]-sulfonated PS) was synthesized by reversible addition fragmentation chain transfer (RAFT) polymerization and postpolymerization modification. In the postpolymerization modification two methods were investigated: in the first one, the polymer was converted to a thiol-terminated polymer by aminolysis. Then a sulfonic acid end-group was produced then by oxidation of the thiol end-group with m-chloroperoxybenzoicacid (m-CPBA); in the second method, the RAFT-polymerized polymer was directly sulfonated by oxidation with m-CPBA. After purification by column chromatography, [omega]-sulfonated PS was obtained by both methods with greater than 95% end-group functionality as measured by titration. The sulfonic acid end-group could be neutralized with various ammonium or imidazolium counter ions through acid-base or ionic metathesis reactions. These polymers with ionic end-group can be used as model supramolecular building blocks.Secondly, ammonium end functionalized polymethylacrylate (PMA) was synthesized directly by RAFT polymerization using functional RAFT agent. Then chain-end sulfonated polystyrene and ammonium end functionalized polymethylacrylate (PMA) were used to synthesize A-B block copolymers by two different methods: the first method was by mixing two oppositely charged end group functionalized polymers; the second method was to ionically bond a RAFT agent to the chain end of an end sulfonated polymer to generate a supramolecular macro RAFT agent then an A-B block copolymer was prepared by RAFT polymerization using supramolecular macro-RAFT agent. The polymerization kinetics were investigated and the molecular weight and the chemical structure of the block copolymers were characterized by 1H-NMR and SEC. The results show that the ion-bonded supramolecular block copolymer, PS-PMA, have been successfully prepared with controlled molecular weight and narrow distribution.Thirdly, the morphology of the ion-bonded supramolecular PS-PMA diblock copolymers were investigated by small-angle X-ray scattering (SAXS) and rheological techniques. Several covalently bonded PS-PMA block copolymers were synthesized by RAFT polymerization and their micro domain structures and rheology behaviors were also investigated. The results showed that the electrostatic interactions between the end ion groups are able to overcome the thermodynamic repulsion of two blocks result in the formation of diblock copolymers with similar behaviors and morphology of traditional covalent bonded diblock copolymers and their micro domain structures remain to high temperatures.
The Synthesis Characterization And Application Of Co2 Soluble Non Ionic Amphiphilic Block Copolymers
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Author : Douglas E. Betts
language : en
Publisher:
Release Date : 1998
The Synthesis Characterization And Application Of Co2 Soluble Non Ionic Amphiphilic Block Copolymers written by Douglas E. Betts and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Block copolymers categories.
Colloidal Polymers
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Author : Abdelhamid Elaissari
language : en
Publisher: CRC Press
Release Date : 2003-08-06
Colloidal Polymers written by Abdelhamid Elaissari and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-08-06 with Science categories.
Amidst developments in nanotechnology and successes in catalytic emulsion polymerization of olefins, polymerization in dispersed media is arousing an increasing interest from both practical and fundamental points of view. This text describes ultramodern approaches to synthesis, preparation, characterization, and functionalization of latexes, nanopa
Advances In Sustainable Polymers
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Author : Vimal Katiyar
language : en
Publisher: Springer Nature
Release Date : 2020-03-03
Advances In Sustainable Polymers written by Vimal Katiyar and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-03-03 with Technology & Engineering categories.
This book discusses synthesis and characterization of sustainable polymers. The book covers opportunities and challenges of using sustainable polymers to replace existing petroleum based feedstock. This volume provides insights into the chemistry of polymerization, and discusses tailoring the properties of the polymers at the source in order fit requirements of specific applications. The book also covers processing of these polymers and their critical assessment. The book will be of use to chemists and engineers in the industry and academia working on sustainable polymers and their commercialization to replace dependence on petroleum-based polymers.