Double Stage Phase Separation In Dynamically Asymmetric Ternary Polymer Blends
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Double Stage Phase Separation In Dynamically Asymmetric Ternary Polymer Blends
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Author : Chen Kuang
language : en
Publisher:
Release Date : 2016
Double Stage Phase Separation In Dynamically Asymmetric Ternary Polymer Blends written by Chen Kuang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Polymers categories.
Phase separation in complex fluids such as polymers has been the subject of several experimental and theoretical studies in recent years. Understanding the phase separation mechanisms and controlling morphological evolution are very important for designing various advanced materials with novel mechanical, optical, electrical, and transport properties. In polymer blends, dynamic asymmetry is induced by a large difference in glass transition temperature. In this work, phase separation behavior of ternary blends of polystyrene/poly(vinyl methyl ether)/polyisoprene, PS/PVME/PI, and polystyrene/poly(vinyl methyl ether)/poly(ethyl methacrylate), PS/PVME/PEMA are investigated. Ternary blends of PS/PVME/PI and PS/PVME/PEMA exhibit complex phase separation behavior since PS and PVME have a lower critical solution temperature (LCST) behavior, while PI and PS (or PVME), PEMA and PS (or PVME) have upper critical solution temperature (UCST) behavior. 2D and 3D phase diagrams for these two ternary systems were plotted by both Flory-Huggins incompressible and regular solution compressible models. Casting the solutions of PS/PVME/PI and PS/PVME/PEMA blends form two phase-separated domains in most compositions: (i) PI-rich or PEMA rich, and (ii) PS/PVME-rich. Post-annealing of such samples leads to the second-stage phase separation due to unfavorable interaction of PS and PVME at temperatures about 100°C. Such behavior that is observed for the first time provides a new potential method for making different morphologies with the same system by changing annealing parameters and composition. Washing one polymer at a time using a selective solvent is used to study the morphology of ternary blends. Optical microscopy and scanning electron microscopy are used to study the kinetics and morphology of viscoelastic phase separation (VPS) in ternary blends.
Process Induced Phase Separation In Polymer Blends
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Author : Suprakas Sinha Ray
language : en
Publisher: Carl Hanser Verlag GmbH Co KG
Release Date : 2023-04-17
Process Induced Phase Separation In Polymer Blends written by Suprakas Sinha Ray and has been published by Carl Hanser Verlag GmbH Co KG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-04-17 with Technology & Engineering categories.
Phase separation in polymer blends has achieved a tremendous techno-commercial importance. Most of the applications of polymer blends, such as tissue engineering, membrane technology, electromagnetic shielding, energy harvesting, structural materials, packaging, smart multiphase polymer coatings, depend on the morphologies developed during processing. This book outlines the fundamental aspects of polymer blend thermodynamics, the state-of-the-art processing techniques for specific polymer blend systems currently in use, and the design and fabrication of multiphasic polymeric materials, which will present a multiplicity of opportunities in the water remediation, packaging, and electronic industries, to mention a few. It emphasizes recent research developments, processing techniques, characterization methods, factors influencing phase separation temperature in phase-separated, including partially miscible, polymer blends, and key research challenges in the development of phase-separated polymers materials. With unique and systematic coverage of the journey from fundamentals to applications in polymer blends, this book is ideal for polymer scientists and engineers, material scientists, researchers, engineers, and under- and post-graduate students who are interested in this exciting field of research. It will help industrial researchers and R&D managers bring advanced phase-separated polymer materials/products to the market.
Maro Polymer Notes
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Author :
language : en
Publisher:
Release Date : 1992
Maro Polymer Notes written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Polymers categories.
Conference Proceedings
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Author : Society of Plastics Engineers. Technical Conference
language : en
Publisher:
Release Date : 1990
Conference Proceedings written by Society of Plastics Engineers. Technical Conference and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Plastics categories.
Engineered Materials Abstracts
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Author :
language : en
Publisher:
Release Date : 1994-04
Engineered Materials Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994-04 with Ceramic materials categories.
Fundamentals Of Phase Separation In Polymer Blend Thin Films
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Author : Sam Coveney
language : en
Publisher: Springer
Release Date : 2015-06-18
Fundamentals Of Phase Separation In Polymer Blend Thin Films written by Sam Coveney and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-06-18 with Science categories.
This work sheds new light on fundamental aspects of phase separation in polymer-blend thin films. A key feature underlying the theoretical models is the unification of one-dimensional thermodynamic phase equilibria with film evolution phenomena in two- and three dimensions. Initially, an established 'phase portrait' method, useful for visualising and calculating phase equilibria of polymer-blend films, is generalised to systems without convenient simplifying symmetries. Thermodynamic equilibria alone are then used to explain a film roughening mechanism in which laterally coexisting phases can have different depths in order to minimise free energy. The phase portraits are then utilised to demonstrate that simulations of lateral phase separation via a transient wetting layer, which conform very well with experiments, can be satisfactorily explained by 1D phase equilibria and a 'surface bifurcation' mechanism. Lastly, a novel 3D model of coupled phase separation and dewetting is developed, which demonstrates that surface roughening shadows phase separation in thin films.
Characterization Of Polymer Blends
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Author : Sabu Thomas
language : en
Publisher: John Wiley & Sons
Release Date : 2015-02-09
Characterization Of Polymer Blends written by Sabu Thomas 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 2015-02-09 with Science categories.
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.
Phase Behavior Of Polymer Blends
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Author : Karl Freed
language : en
Publisher: Springer Science & Business Media
Release Date : 2005-09-01
Phase Behavior Of Polymer Blends written by Karl Freed and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-09-01 with Technology & Engineering categories.
Encyclopedia Of Polymer Blends Volume 3
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Author : Avraam I. Isayev
language : en
Publisher: John Wiley & Sons
Release Date : 2016-06-07
Encyclopedia Of Polymer Blends Volume 3 written by Avraam I. Isayev 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 2016-06-07 with Science categories.
A complete and timely overview of the topic, this Encyclopedia imparts knowledge of fundamental principles and their applications for academicians, scientists and researchers, while informing engineers, industrialists and entrepreneurs of the current state of the technology and its utilization. The most comprehensive source on polymer blends available on the market Offers a complete and timely overview of the topic Each article presents up to date research & development on a topic and its basic principles and applications, integrates case studies, laboratory and pilot plant experiments, and gives due reference to published and patented literature Equips academics, scientists and researchers with knowledge of fundamentals principles and their applications, and informs the engineers, industrialists and entrepreneurs about the state of the art technology and its applications
Handbook Of Benzoxazine Resins
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Author : Hatsuo Ishida
language : en
Publisher: Elsevier
Release Date : 2011-07-13
Handbook Of Benzoxazine Resins written by Hatsuo Ishida and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-07-13 with Technology & Engineering categories.
This handbook provides a wide overview of the field, fundamental understanding of the synthetic methods and structure/property correlation, as well as studies related to applications in a wide range of subjects. The handbook also provides 1H and 13C NMR spectra, FTIR spectra, DSC and TGA thermograms to aid in research activities. Additional tables on key NMR and FTIR frequencies unique to benzoxazine, heat of polymerization, Tg, and char yield will greatly aid in the choice of proper benzoxazine for a specific application. Provides thorough coverage of the chemistry and applications of benzoxazine resins with an evidence-based approach to enable chemists, engineers and material scientists to evaluate effectiveness Features spectra, which allow researchers to compare results, avoid repetition and save time as well as tables on key NMR frequency, IR frequency, heat of polymerization, of many benzoxazine resins to aid them in selection of materials Written by the foremost experts in the field