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Polymer Micelles

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ISBN: 9783038428077 9783038428084 Year: Pages: VIII, 220 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Biochemistry
Added to DOAB on : 2018-04-20 15:30:28
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Classically, polymer micelles have been defined as aggregates formed by the self-association of amphiphilic polymers due to the hydrophobic interactions between polymer molecules in water. Practical applications of polymer micelles include as carriers in drug delivery systems, as solubilizers, and as associative thickeners. Polymer micelles that do not fall within the classical definition have recently been reported and reflect important developments in synthesis and analysis. For example, hydrophobic interactions are the classic force driving polymer association, whereas recently, micelles have been formed through interactions such as electrostatics, hydrogen bonds, and coordination bonds. Intermolecular association results in the formation of polymer micelles that are similar to micelles formed from low molecular weight surfactants, whereas unimolecular micelles formed by intramolecular association within a single polymer chain have also been reported, as have stimuli-responsive polymer micelles. It is therefore important to constantly update the information available and our knowledge of polymer micelles. This special issue covers synthesis, characterization, solution properties, association behavior, simulation, and the application of polymer micelles and polymer aggregates. The aim of this issue is to expand our knowledge of polymer micelles by gathering together the latest basic and applied information regarding these supramolecular structures.

Host-Guest Polymer Complexes

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ISBN: 9783038971948 9783038971955 Year: Pages: 258 DOI: 10.3390/books978-3-03897-195-5 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Chemistry (General)
Added to DOAB on : 2018-10-02 11:29:02
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I enthusiastically invite you to contribute to a Special Issue of the open-access journal Polymers, focusing on “Host–Guest Polymer Complexes”, which I and two of my former PhD students, Drs. Alper Gurarslan and Ganesh Narayanan, are editing. We hope to include papers describing the syntheses, characterization, and use of host–guest polymer complexes, as well as factors that are important to their formation. Submissions that describe unusual and unique applications of host–guest polymer complexes using hosts other than traditional ones: cyclodextrins, cucurbiturils, urea, thiourea, cyclotriphosphazines, etc., are particularly encouraged.I hope that you accept our invitation to make this Special Issue one that will introduce, effectively summarize, and increase interest in this important area of polymer science.

Drying, film formation and open time of aqueous polymer dispersions : an investigation of different aspects by rheometry and inverse-micro-raman-spectroscopy (IMRS)

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ISBN: 9783866442849 Year: Pages: X, 221 S DOI: 10.5445/KSP/1000009284 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Chemical Engineering
Added to DOAB on : 2019-07-30 20:02:01
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The application properties and the final coating properties of waterborne polymer dispersions are poor compared to the ones of polymer solutions with organic solvents. This is expressed by a short open time and by inhomogeneities and defects that are visible in the final dry coating.Aim of this work is an investigation and discussion of the different aspects that are responsible for the poor application and coating properties of aqueous latex dispersions by experiments and model calculations.

Material Recycling - Trends and Perspectives

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ISBN: 9789535103271 9789535141006 Year: Pages: 422 DOI: 10.5772/2003 Language: English
Publisher: IntechOpen
Subject: Chemical Technology
Added to DOAB on : 2019-10-03 07:51:48

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The presently common practice of wastes' land-filling is undesirable due to legislation pressures, rising costs and the poor biodegradability of commonly used materials. Therefore, recycling seems to be the best solution. The purpose of this book is to present the state-of-the-art for the recycling methods of several materials, as well as to propose potential uses of the recycled products. It targets professionals, recycling companies, researchers, academics and graduate students in the fields of waste management and polymer recycling in addition to chemical engineering, mechanical engineering, chemistry and physics. This book comprises 16 chapters covering areas such as, polymer recycling using chemical, thermo-chemical (pyrolysis) or mechanical methods, recycling of waste tires, pharmaceutical packaging and hardwood kraft pulp and potential uses of recycled wastes.

Polyester - Production, Characterization and Innovative Applications

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ISBN: 9789535138815 9789535138822 9789535140917 Year: Pages: 98 DOI: 10.5772/intechopen.69941 Language: English
Publisher: IntechOpen
Subject: Organic Chemistry --- Chemical Technology
Added to DOAB on : 2019-10-03 07:51:51

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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.

Plastics in the Environment

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ISBN: 9781838804923 9781838804930 9781789840452 Year: Pages: 106 DOI: 10.5772/intechopen.75849 Language: English
Publisher: IntechOpen
Subject: Organic Chemistry --- Chemical Technology
Added to DOAB on : 2019-10-03 07:51:53

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Plastics in the Environment is a collection of reviewed and relevant research chapters, offering a comprehensive overview of recent developments in the field of plastic pollution and how it is affecting the environment. The book comprises single chapters authored by various researchers and edited by an expert active in the research area. All chapters are complete in themselves but united under a common research study topic. This publication aims at providing a thorough overview of the latest research efforts by international authors on the trending topic of plastics in the environment and opens new possible research paths for further novel developments.

Polymer Blends and Compatibilization

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ISBN: 9783038423652 9783038423645 Year: Pages: Pages: VII, 143 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Organic Chemistry --- Chemistry (General)
Added to DOAB on : 2017-03-15 13:01:10
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The market is continuously looking for substitutes for expensive polymers or tailor made polymers for specific applications. Therefore, polymer blends are gaining more interest since they possess a great potential to fulfill these needs. Blending not only results in better final properties, but can also improve the processing behavior and reduce costs. In the field of polymer blends, there are numerous parameters that influence the morphology, e.g., viscosity ratio, blend composition, shear conditions, and blend ratio. There is still a great deal of potential to scientifically exploit the possibilities of blend technology, which is necessary to obtain a foundation based on science, engineering, technology, and applications in order to make it possible to tailor polymer blends as desired.However, combining two or more different polymers to receive favorable properties by blending often results in immiscible polymer blends. This immiscibility goes hand-in-hand with phase separation leading to weak mechanical properties. The high interfacial tension causing this can be reduced by compatibilization of polymer blends. There are different methods to achieve this, such as adding block and graft copolymers, reactive polymers to form block and graft copolymers, nanoparticles or organic molecules. Using suitable compatibilizers, not only is the interfacial adhesion between matrix and its blends reduced, but also the dispersion of the dispersed phase is improved, the adhesion between the phases is enhanced and the morphology is stabilized. This can lead to improved mechanical and morphological properties.Designing new polymer blends or improving the properties of immiscible polymer blends by compatibilization is very challenging, but an excellent way to exploit the full potential of polymers for applications and their varied needs.This Special Issue is a source of information on all recent aspects of polymer blend technology.

Advance of Polymers Applied to Biomedical Applications: Cell Scaffolds

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ISBN: 9783038970330 9783038970347 Year: Pages: 406 DOI: 10.3390/books978-3-03897-034-7 Language: englisch
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Chemistry (General)
Added to DOAB on : 2018-09-04 13:51:22
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Since Langer’s seminal work, polymers have been on every corner of tissue engineering. The roles of bioresorbable polymers, as a scaffold, are not merely structural, providing three-dimensional (3D) homing sites to cells, but also functional at their interface with the cells. The polymeric scaffolds actively act as both biochemical and physical cues for cell behaviors, such as adhesion, growth, proliferation, and differentiation. Polymers and cells could interact further with each other mutually, sensing and responding to the signals from the partner. Technological advances in this direction, including chemical modification of polymer scaffolds, highly cytocompatible hybrid materials/composites, dynamic scaffolds, control of juxtacrine interactions, and 3D bioprinting and microfluidic devices, ensure the advances in polymers as cell scaffolds. The detection and characterization methods for cell-material interactions and cell behaviors have been greatly improved, and new characterization techniques have emerged. Recent years have witnessed a quantum leap of progress in tissue engineering and regenerative medicine, and this edited book illustrates some of the advances in polymers as cell scaffolds.

Micro- and Nanostructured Microfluidic Devices for Localized Protein Immobilization and Other Biomedical Applications

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Book Series: Schriften des Instituts für Mikrostrukturtechnik am Karlsruher Institut für Technologie / Hrsg.: Institut für Mikrostrukturtechnik ISSN: 18695183 ISBN: 9783731502975 Year: Volume: 29 Pages: IX, 138 p. DOI: 10.5445/KSP/1000044095 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:01:58
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A new immobilization method for the localized adsorption of proteins on thermoplastic surfaces is introduced. Artificial three-phase interfaces were realized by surface structuring to control the wetting behavior which lead to a preferred adsorption in these modified areas. Additionally, different fabrication methods were analyzed to determine mass fabrication capabilities. These fabrication methods also allowed the production of fully structured microchannels to tune the fluids behavior within.

Influence of cellulose ethers on the kinetics of early Portland cement hydration

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Book Series: Karlsruher mineralogische und geochemische Hefte ISSN: 16182677 ISBN: 9783866440777 Year: Volume: 32 Pages: III, 110 p. DOI: 10.5445/KSP/1000005907 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Astronomy (General)
Added to DOAB on : 2019-07-30 20:02:00
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The phase-specific influence of cellulose ether (CEs) on Portland cement hydration was investigated in-situ, using synchrotron X-ray diffractometry. CE-caused retardation can be traced to the polymers adsorption behaviour. The adsorption decreases in following order: silicates and their hydrates (high), sulfates (low), ettringite (zero). The retarding effect is strong on silicates, moderate on sulfates and unspecific on alluminates.

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