Fundamentals Of Phase Separation In Polymer Blend Thin Films

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Fundamentals Of Phase Separation In Polymer Blend Thin Films


Fundamentals Of Phase Separation In Polymer Blend Thin Films
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Fundamentals Of Phase Separation In Polymer Blend Thin Films


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.

Nanostructured Polymer Blends


Nanostructured Polymer Blends
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Author : Juan Rodríguez-Hernández
language : en
Publisher: Elsevier Inc. Chapters
Release Date : 2013-11-28

Nanostructured Polymer Blends written by Juan Rodríguez-Hernández and has been published by Elsevier Inc. Chapters this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-28 with Technology & Engineering categories.


The design of polymer blends constitutes an interesting alternative to obtaining micro- and nanostructured surfaces. The cost is reasonable and it is free from time-consuming procedures. Blending of polymers can yield materials with unprecedented properties that cannot be provided otherwise by using a single polymer. The free surface topography of polymer blend films, often related to phase domain structure, is critical to the applications. Two main aspects need to be considered in the preparation of multistructured blends: the interfaces involved and the morphology to be obtained. The control of these two aspects depends further on materials-related parameters involving the composition of the blend, the interfacial tension or viscosity ratio, and the processing conditions related to the temperature, time, or intensity of mixing, among others. Both domain structure and topography of the blend films have garnered increasing interest over the past decade. This chapter describes the nanomicrostructures formed at the polymer surface from polymer blends. Despite the crucial role that surfaces play in the final application of the material, up to now most of the studies concerning polymer blends have been related to the control of the mechanical properties (toughness, stiffness, thermal expansion, etc.), their barrier properties, or the electrical conductivity. This chapter focuses on the analysis of the structured polymer surfaces and thin films, giving an overview of the role of these structures on the final application. The principles of phase separation and the resulting structures formed are briefly discussed, followed by a wide overview of the possibilities of producing stimuli-responsive interfaces by introducing, among other things, pH- or temperature-responsive polymers within the blend. Finally, we look at how using particular preparation conditions and/or self-assembly of block copolymers, the formation of films and surfaces with hierarchical order length-scales can be induced. We also examine the main areas in which multiscale-ordered interfaces obtained from polymer blends have been applied.

Fundamentals Of Conjugated Polymer Blends Copolymers And Composites


Fundamentals Of Conjugated Polymer Blends Copolymers And Composites
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Author : Parveen Saini
language : en
Publisher: John Wiley & Sons
Release Date : 2015-04-24

Fundamentals Of Conjugated Polymer Blends Copolymers And Composites written by Parveen Saini 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 2015-04-24 with Technology & Engineering categories.


Since their discovery in 1977, the evolution of conducting polymers has revolutionized modern science and technology. These polymers enjoy a special status in the area of materials science yet they are not as popular among young readers or common people when compared to other materials like metals, paper, plastics, rubber, textiles, ceramics and composites like concrete. Most importantly, much of the available literature in the form of papers, specific review articles and books is targeted either at advanced readers (scientists/technologists/engineers/senior academicians) or for those who are already familiar with the topic (doctoral/postdoctoral scholars). For a beginner or even school/college students, such compilations are bit difficult to access/digest. In fact, they need proper introduction to the topic of conducting polymers including their discovery, preparation, properties, applications and societal impact, using suitable examples and already known principles/knowledge/phenomenon. Further, active participation of readers in terms of “question & answers”, “fill-in-the-blanks”, “numerical” along with suitable answer key is necessary to maintain the interest and to initiate the “thought process”. The readers also need to know about the drawbacks and any hazards of such materials. Therefore, I believe that a comprehensive source on the science/technology of conducting polymers which maintains a link between grass root fundamentals and state-of-the-art R&D is still missing from the open literature.

Polymer Morphology


Polymer Morphology
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Author : Qipeng Guo
language : en
Publisher: John Wiley & Sons
Release Date : 2016-03-21

Polymer Morphology written by Qipeng Guo 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 2016-03-21 with Technology & Engineering categories.


With a focus on structure-property relationships, this book describes how polymer morphology affects properties and how scientists can modify them. The book covers structure development, theory, simulation, and processing; and discusses a broad range of techniques and methods. • Provides an up-to-date, comprehensive introduction to the principles and practices of polymer morphology • Illustrates major structure types, such as semicrystalline morphology, surface-induced polymer crystallization, phase separation, self-assembly, deformation, and surface topography • Covers a variety of polymers, such as homopolymers, block copolymers, polymer thin films, polymer blends, and polymer nanocomposites • Discusses a broad range of advanced and novel techniques and methods, like x-ray diffraction, thermal analysis, and electron microscopy and their applications in the morphology of polymer materials

Nanolithography And Patterning Techniques In Microelectronics


Nanolithography And Patterning Techniques In Microelectronics
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Author : D Bucknall
language : en
Publisher: Elsevier
Release Date : 2005-09-30

Nanolithography And Patterning Techniques In Microelectronics written by D Bucknall and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-09-30 with Science categories.


Techniques such as surface patterning have facilitated the emergence of advanced polymers with applications in areas such as microelectronics. Surface patterning of polymers has conventionally been undertaken by optical lithography. However, a new generation of nanolithographic and patterning techniques has made it possible to develop complex patterns at the nanoscale. Non-conventional lithography and patterning summarises this new range of techniques and their industrial applications. A number of chapters look at ways of forming and modifying surfaces for patterning. These are complemented by chapters on particular patterning techniques such as soft lithography, ion beam patterning, the use of nanostencils, photolithography and inkjet printing. The book also discusses prototyping and the manufacture of particular devices. With its distinguished international team of contributors, Non-conventional lithography and patterning is a standard reference for both those researching and using advanced polymers in such areas as microelectronics and biomedical devices. Looks at alternative approaches used to develop complex patterns at the nanoscale Concentrates on state of the art nanolithographic methods Written by a distinguished international team of contributors

Biopolymer Thin Films And Coatings


Biopolymer Thin Films And Coatings
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Author : Stefan Spirk
language : en
Publisher: Frontiers Media SA
Release Date : 2020-01-10

Biopolymer Thin Films And Coatings written by Stefan Spirk and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-01-10 with categories.


In science as well as in industry, the impetus of research on bio-based polymers has recently expanded into new terrains. The need to replace fossil-based materials with sustainable and renewable sources is one of the main drivers for the emergence and the development of new and environmentally friendly materials. While some materials applications of bio-based polymers are already very well established, for instance, in paper and textiles, others have just emerged with thin films and coatings being a recent and particular area of interest. Thin films in general are an enormous field of research both fundamentally and from an applied perspective, with uses ranging from corrosion resistance to photovoltaics and sensors. Since bio-based materials are a relatively novel source material for thin films, the research in this area is at a fresh, exciting stage at the moment.

Nanostructured Polymer Blends


Nanostructured Polymer Blends
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Author : Sabu Thomas
language : en
Publisher: William Andrew
Release Date : 2013-11-28

Nanostructured Polymer Blends written by Sabu Thomas and has been published by William Andrew this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-28 with Technology & Engineering categories.


Over 30% of commercial polymers are blends or alloys or one kind or another. Nanostructured blends offer the scientist or plastics engineer a new range of possibilities with characteristics including thermodynamic stablility; the potential to improve material transparency, creep and solvent resistance; the potential to simultaneously increase tensile strength and ductility; superior rheological properties; and relatively low cost. Nanostructured Polymer Blends opens up immense structural possibilities via chemical and mechanical modifications that generate novel properties and functions and high-performance characteristics at a low cost. The emerging applications of these new materials cover a wide range of industry sectors, encompassing the coatings and adhesives industry, electronics, energy (photovoltaics), aerospace and medical devices (where polymer blends provide innovations in biocompatible materials). This book explains the science of nanostructure formation and the nature of interphase formations, demystifies the design of nanostructured blends to achieve specific properties, and introduces the applications for this important new class of nanomaterial. All the key topics related to recent advances in blends are covered: IPNs, phase morphologies, composites and nanocomposites, nanostructure formation, the chemistry and structure of additives, etc. Introduces the science and technology of nanostructured polymer blends – and the procedures involved in melt blending and chemical blending to produce new materials with specific performance characteristics Unlocks the potential of nanostructured polymer blends for applications across sectors, including electronics, energy/photovoltaics, aerospace/automotive, and medical devices (biocompatible polymers) Explains the performance benefits in areas including rheological properties, thermodynamic stablility, material transparency, solvent resistance, etc.