Fluorescence Studies of Polymer Association in Water and Droplet Coalescence in Polymer Blend Melts [microform] PDF Download
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![Fluorescence Studies of Polymer Association in Water and Droplet Coalescence in Polymer Blend Melts [microform] PDF](https://books.google.com/books/content/images/frontcover/3QTSygAACAAJ?fife=w150-h200)
Author: Olga Vorobyova
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN: 9780612536852
Category :
Languages : en
Pages : 484
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![Fluorescence Studies of Polymer Association in Water and Droplet Coalescence in Polymer Blend Melts [microform] PDF](https://books.google.com/books/content/images/frontcover/3QTSygAACAAJ?fife=w80-h100)
Author: Olga Vorobyova
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN: 9780612536852
Category :
Languages : en
Pages : 484
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Category :
Languages : en
Pages :
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Author: Olga Vorobyova
Publisher:
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Category :
Languages : en
Pages : 0
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The first part of this thesis is a study of aqueous solutions of two associative polymers by pyrene fluorescent probe experiments. The polymers we studied are based on a linear monodisperse poly(ethylene oxide) of Mn = 35,000, with C16H33 and C18H37 end groups. The hydrophobic end groups of this polymer associate forming micelle-like structures, which serve as solubilization sites for the pyrene molecules. Fluorescence decay profiles of pyrene were fitted to the Poisson quenching model to obtain the fitting parameter n, the mean number of quenchers per micelle. From the values of n we calculated the end-group aggregation number NR over a range of polymer concentrations, from 0.1 to 17 wt.%. We found that the aggregation number increases with the polymer concentration. The second part of the thesis examines various aspects of latex blend films. The main component (90 wt.%) in the blend is a soft polymer PEHMA [poly(2-ethylhexyl methacrylate)]. The minor component (10 wt.%) is a harder polymer PBMA [poly(butyl methacrylate)], dispersed as 120 nm spheres in the PEHMA matrix. The PBMA particles were labeled with 1 mol.% of covalently bound fluorescent dyes, either phenanthrene or anthracene. We studied shear-induced coalescence in these blends, both 'in line', using a home-built Rheo-Fluo device consisting of a parallel plate rheometer and a fiber-optic assisted fluorescence detection system, and 'off line', using laser scanning confocal fluorescence microscopy. We evaluated the mean size and the width of the particle size distribution of the dispersed phase at various shear rates and found that the size first increases (after 1 hour of shearing) and then decreases (after 10 hours). Comparison with the results obtained under quiescent conditions indicated that shear is highly efficient in promoting coalescence. We also studied the effects of the film preparation conditions on the morphology of the newly formed films and found that in the presence of the surfactant SDS (2 wt.%) the PBMA particles flocculate forming network-like structures. When the surfactant is removed from the dispersion by ion exchange, the blend morphology is uniform. Finally, we evaluated the interface thickness 8 between PBMA and PEHMA using the nonradiative energy transfer method.
![Fluorescence Studies of Polymer Interfaces and Surfaces [microform] PDF](https://books.google.com/books/content/images/frontcover/GbJFYgEACAAJ?fife=w80-h100)
Author: Ping Zhang
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN: 9780612119857
Category :
Languages : en
Pages : 244
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Author: Sabu Thomas
Publisher: John Wiley & Sons
ISBN: 3527331530
Category : Science
Languages : en
Pages : 972
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Book Description
Filling the gap for a reference dedicated to the characterization of polymer blends and their micro and nano morphologies, this book provides comprehensive, systematic coverage in a one-stop, two-volume resource for all those working in the field. Leading researchers from industry and academia, as well as from government and private research institutions around the world summarize recent technical advances in chapters devoted to their individual contributions. In so doing, they examine a wide range of modern characterization techniques, from microscopy and spectroscopy to diffraction, thermal analysis, rheology, mechanical measurements and chromatography. These methods are compared with each other to assist in determining the best solution for both fundamental and applied problems, paying attention to the characterization of nanoscale miscibility and interfaces, both in blends involving copolymers and in immiscible blends. The thermodynamics, miscibility, phase separation, morphology and interfaces in polymer blends are also discussed in light of new insights involving the nanoscopic scale. Finally, the authors detail the processing-morphology-property relationships of polymer blends, as well as the influence of processing on the generation of micro and nano morphologies, and the dependence of these morphologies on the properties of blends. Hot topics such as compatibilization through nanoparticles, miscibility of new biopolymers and nanoscale investigations of interfaces in blends are also addressed. With its application-oriented approach, handpicked selection of topics and expert contributors, this is an outstanding survey for anyone involved in the field of polymer blends for advanced technologies.
Author: Jan W. Gooch
Publisher: Springer Science & Business Media
ISBN: 1441962468
Category : Science
Languages : en
Pages : 1048
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Book Description
This reference, in its second edition, contains more than 7,500 polymeric material terms, including the names of chemicals, processes, formulae, and analytical methods that are used frequently in the polymer and engineering fields. In view of the evolving partnership between physical and life sciences, this title includes an appendix of biochemical and microbiological terms (thus offering previously unpublished material, distinct from all competitors.) Each succinct entry offers a broadly accessible definition as well as cross-references to related terms. Where appropriate to enhance clarity further, the volume's definitions may also offer equations, chemical structures, and other figures. The new interactive software facilitates easy access to a large database of chemical structures (2D/3D-view), audio files for pronunciation, polymer science equations and many more.
Author: Nicholas P. Cheremisinoff
Publisher: Univ. Press of Mississippi
ISBN: 0080946399
Category : Science
Languages : en
Pages : 265
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Book Description
This volume provides an overview of polymer characterization test methods. The methods and instrumentation described represent modern analytical techniques useful to researchers, product development specialists, and quality control experts in polymer synthesis and manufacturing. Engineers, polymer scientists and technicians will find this volume useful in selecting approaches and techniques applicable to characterizing molecular, compositional, rheological, and thermodynamic properties of elastomers and plastics.
Author: Chuanbing Tang
Publisher: John Wiley & Sons
ISBN: 352734019X
Category : Technology & Engineering
Languages : en
Pages : 458
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Book Description
Offering a unique perspective summarizing research on this timely important topic around the globe, this book provides comprehensive coverage of how molecular biomass can be transformed into sustainable polymers. It critically discusses and compares a few classes of biomass - oxygen-rich, hydrocarbon-rich, hydrocarbon and non-hydrocarbon (including carbon dioxide) as well as natural polymers - and equally includes products that are already commercialized. A must-have for both newcomers to the field as well as established researchers in both academia and industry.
Author: Hans-Jürgen Butt
Publisher: John Wiley & Sons
ISBN: 3527836160
Category : Science
Languages : en
Pages : 485
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Book Description
Physics and Chemistry of Interfaces Comprehensive textbook on the interdisciplinary field of interface science, fully updated with new content on wetting, spectroscopy, and coatings Physics and Chemistry of Interfaces provides a comprehensive introduction to the field of surface and interface science, focusing on essential concepts rather than specific details, and on intuitive understanding rather than convoluted math. Numerous high-end applications from surface technology, biotechnology, and microelectronics are included to illustrate and help readers easily comprehend basic concepts. The new edition contains an increased number of problems with detailed, worked solutions, making it ideal as a self-study resource. In topic coverage, the highly qualified authors take a balanced approach, discussing advanced interface phenomena in detail while remaining comprehensible. Chapter summaries with the most important equations, facts, and phenomena are included to aid the reader in information retention. A few of the sample topics included in Physics and Chemistry of Interfaces are as follows: Liquid surfaces, covering microscopic picture of a liquid surface, surface tension, the equation of Young and Laplace, and curved liquid surfaces Thermodynamics of interfaces, covering surface excess, internal energy and Helmholtz energy, equilibrium conditions, and interfacial excess energies Charged interfaces and the electric double layer, covering planar surfaces, the Grahame equation, and limitations of the Poisson-Boltzmann theory Surface forces, covering Van der Waals forces between molecules, macroscopic calculations, the Derjaguin approximation, and disjoining pressure Physics and Chemistry of Interfaces is a complete reference on the subject, aimed at advanced students (and their instructors) in physics, material science, chemistry, and engineering. Researchers requiring background knowledge on surface and interface science will also benefit from the accessible yet in-depth coverage of the text.
Author: Swapan Kumar Ghosh
Publisher: John Wiley & Sons
ISBN: 3527625380
Category : Technology & Engineering
Languages : en
Pages : 306
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Book Description
The book covers self-healing concepts for all important material classes and their applications: polymers, ceramics, non-metallic and metallic coatings, alloys, nanocomposites, concretes and cements, as well as ionomers. Beginning with the inspiration from biological self-healing, its mimickry and conceptual transfer into approaches for the self-repair of artificially created materials, this book explains the strategies and mechanisms for the readers' basic understanding, then covers the different material classes and suitable self-healing concepts, giving examples for their application in practical situations. As the first book in this swiftly growing research field, it is of great interest to readers from many scientific and engineering disciplines, such as physics and chemistry, civil, architectural, mechanical, electronics and aerospace engineering.
