Download or read book Structure Property Relationships In Multilayered Polymeric System And Olefinic Block Copolymers written by Devang Khariwala and published by . This book was released on 2011 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dissertation focuses on structure-property relationships in several polymeric systems. In part I, the effect of tie-layer thickness on delamination behavior of polypropylene/tie-layer/Nylon-6 multilayers is examined. Various maleated polypropylene resins were compared for their effectiveness as tie-layers. Delamination failure occurred cohesively in all the multilayer systems. Two adhesion regimes were defined based on the change in slope of the linear relationship between the delamination toughness and the tie-layer thickness. The measured delamination toughness of the various tie-layers was quantitatively correlated to the damage zone length formed at the crack tip. Exciting new developments in polyolefin synthesis give rise to olefinic block copolymers with properties typical of thermoplastic elastomers. Part II of the dissertation describes the material science of these unique polymers as characterized by thermal analysis, x ray diffraction, microscopy, and tensile deformation. The block copolymers synthesized by chain shuttling technology consist of crystallizable ethylene-octene blocks with low comonomer content and high melting temperature (hard blocks), alternating with amorphous ethylene-octene blocks with high comonomer content and low glass transition temperature (soft blocks). Blocky ethylene-octene copolymers differ from random copolymers in their rapid rate of crystallization and in the formation of space-filling spherulites even when the crystallinity is as low as 7 %. The crystallization kinetics of these copolymers in terms of bulk crystallization and spherulite growth rate is compared.
Download or read book Structure property Relationships in Dynamic Polymer Networks written by Christopher Brittain Cooper and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many emerging applications including wearable electronics and e-skins, soft robotics and actuators, and biomaterials, require material platforms with precisely controlled mechanical, electrical, thermal, and optical properties. The practical realization of devices for these applications is often restricted not by the lack of novel designs, but rather by the sparsity of materials with the required properties. Dynamic polymers, which employ both permanent and reversible linkages, offer a promising platform for the design of new materials due to their highly tunable and responsive chemical structures. This dissertation explores structure-property relationships in different dynamic polymer networks with well-defined polymer design and is structured as follows. Chapter 1 introduces the concept of dynamic polymers, provides comparisons to supramolecular polymers and segmented block copolymers, and concludes with emerging applications for these systems. Chapter 2 examines the molecular design rules for spontaneous self-assembly of periodic dynamic polymers into supramolecular nanofibers. Chapter 3 discusses the phenomenon of strain-induced supramolecular structures exhibited by entangled periodic dynamic polymers. Chapter 4 highlights how the clustered nanomorphology exhibited by periodic dynamic polymers can be used to design recyclable underwater adhesives. Chapter 5 explains how immiscible dynamic polymers can be used to achieve autonomous alignment of multilayered soft electronics. Chapter 6 concludes with key observations and on the future outlook of next-generation materials.
Download or read book Manufacturing and Novel Applications of Multilayer Polymer Films written by Deepak Langhe and published by William Andrew. This book was released on 2016-01-04 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manufacturing and Novel Applications of Multilayer Polymer Films discusses the advancements in multilayer technology, including its capability to produce hundreds of layers in a single film by a melt coextrusion process. These engineered films can have significantly enhanced performance properties, allowing films to be made thinner, stronger, and with better sealing properties. As recent developments in feedblocks and materials have opened up a range of new possibilities, this book discusses different feedblocks, and viscosity and material considerations. It is the first comprehensive summary of the latest technology in multilayer film processing and related applications, and is written from a practical perspective, translating research into commercial production and real world products. The book provides fundamental knowledge on microlayer coextrusion processing technology, how to fabricate such structures, structure and properties of such microlayers, and potential applications, thus helping research scientists and engineers develop products which not only fulfill their primary function, but can also be manufactured reliably, safely, and economically. - Provides a fundamental knowledge of microlayer coextrusion processing, including how to fabricate microlayer structures, the properties of microlayers, and potential applications, including optics, polymer film capacitors, and semiconductors - Includes an in-depth analysis of all technologies used for producing multilayered films and structures by coextrusion processing - Thoroughly assesses potential future trends in multilayer coextrusion technology, thus enabling engineers and scientists to stay ahead of the curve in this rapidly advancing area
Download or read book Structure Property Relationships in Polymers written by Charles E. Carraher Jr. and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first concern of scientists who are interested in synthetic polymers has always been, and still is: How are they synthesized? But right after this comes the question: What have I made, and for what is it good? This leads to the important topic of the structure-property relations to which this book is devoted. Polymers are very large and very complicated systems; their character ization has to begin with the chemical composition, configuration, and con formation of the individual molecule. The first chapter is devoted to this broad objective. The immediate physical consequences, discussed in the second chapter, form the basis for the physical nature of polymers: the supermolecular interactions and arrangements of the individual macromolecules. The third chapter deals with the important question: How are these chemical and physical structures experimentally determined? The existing methods for polymer characterization are enumerated and discussed in this chapter. The following chapters go into more detail. For most applications-textiles, films, molded or extruded objects of all kinds-the mechanical and the thermal behaviors of polymers are of pre ponderant importance, followed by optical and electric properties. Chapters 4 through 9 describe how such properties are rooted in and dependent on the chemical structure. More-detailed considerations are given to certain particularly important and critical properties such as the solubility and permeability of polymeric systems. Macromolecules are not always the final goal of the chemist-they may act as intermediates, reactants, or catalysts. This topic is presented in Chapters 10 and 11.
Download or read book Structure property Relationships in Novel Polymers and Block Copolymers from Ring opening Metathesis Polymerization written by John Paul Bishop and published by . This book was released on 2011 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Processing Structure and Properties of Block Copolymers written by M.J. Folkes and published by Springer. This book was released on 1985-03-31 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Block copolymers represent an important class of multi-phase material, which have received very widespread attention, particularly since their successful commercial development in the mid-1960s. Much of the interest in these polymers has arisen because of their rather remarkable micro phase morphology and, hence, they have been the subject of extensive microstructural examination. In many respects, the quest for a comprehensive interpretation of their structure, both theoretically and experimentally, has not been generally matched by a corresponding enthusiasm for developing structure/property relationships in the context of their commercial application. Indeed, it has been left largely to the industrial companies involved in the development and utilization of these materials to fulfil this latter role. While it is generally disappointing that a much greater synergism does not exist between science and technology, it is especially sad in the case of block copolymers. Thus these materials offer an almost unique opportunity for the application of fundamental structural and property data to the interpretation of the properties of generally processed artefacts. Accordingly, in this book, the editor has drawn together an eminent group of research workers, with the specific intention of highlighting some of those aspects of the science and technology of block copolymers that are potentially important if further advances are to be made either in material formulation or utilization. For example, special consideration is given to the relationship between the flow properties of block copo lymers and their microstructure.
Download or read book Processing Structure and Properties of Block Copolymers written by M.J. Folkes and published by Springer. This book was released on 2011-10-23 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: Block copolymers represent an important class of multi-phase material, which have received very widespread attention, particularly since their successful commercial development in the mid-1960s. Much of the interest in these polymers has arisen because of their rather remarkable micro phase morphology and, hence, they have been the subject of extensive microstructural examination. In many respects, the quest for a comprehensive interpretation of their structure, both theoretically and experimentally, has not been generally matched by a corresponding enthusiasm for developing structure/property relationships in the context of their commercial application. Indeed, it has been left largely to the industrial companies involved in the development and utilization of these materials to fulfil this latter role. While it is generally disappointing that a much greater synergism does not exist between science and technology, it is especially sad in the case of block copolymers. Thus these materials offer an almost unique opportunity for the application of fundamental structural and property data to the interpretation of the properties of generally processed artefacts. Accordingly, in this book, the editor has drawn together an eminent group of research workers, with the specific intention of highlighting some of those aspects of the science and technology of block copolymers that are potentially important if further advances are to be made either in material formulation or utilization. For example, special consideration is given to the relationship between the flow properties of block copo lymers and their microstructure.
Download or read book Structure Property Relationships of Block Copolymers Confined Via Forced Assembly Co Extrusion for Enhanced Physical Properties written by Tiffani M. Burt and published by . This book was released on 2013 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation is focused on the characterization of elastomeric block copolymers confined via multilayer co-extrusion technology. In this work, we utilized both self-assembly and forced assembly to achieve hierarchical design within films for mechanical enhancement. When block copolymers are forced to self-assemble in restricted geometries, their physical properties tend to deviate from the bulk behavior. An understanding of their physical properties under confinement has become imperative as technology pushes polymeric applications toward thinner geometries. This work utilizes multilayer co-extrusion as a continuous, confining mechanism to exploit the effect of confining layer and layer thickness on commercially available block copolymers. It was discovered that the morphology and orientation of the block copolymer while under confinement drastically affects the mechanical response of the multilayer films. A thorough understanding of these key factors allows for a methodology to tune the mechanical response of multilayer films via a continuous methodology.
Download or read book Structure physical Properties Relationships of Block Copolymers and Polymer Blends written by Mirosława El Fray and published by . This book was released on 1997 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure property Relationships in Model Polyolefins written by Peter Andrew Weimann and published by . This book was released on 1998 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure property Relationships in Block Copolymers written by John Bard and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling Self assembly and Structure property Relationships in Block Copolymers written by Manas Ravindra Shah and published by . This book was released on 2009 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Block copolymers have been subject of tremendous research interest owing to their capability of undergoing self-assembly which allows them to tailor their electrical, optical, and mechanical properties. Statistical mechanics of flexible block copolymers is well understood. However, there are many unresolved issues with confinement of block copolymers as well as structure formation in block copolymers having non-flexible polymer blocks. We develop mean field theory models to address the issues arising in thermodynamics of such complex block copolymers. Also, we develop theoretical formalisms to understand the link between morphology and macroscopic properties in these block copolymers. We study the stability and ordering in thin films of flexible diblock copolymer in the presence of compressible solvent using a combined polymer mean field theory and lattice gas model for binary fluid mixtures. We utilize mean field theory model to understand the self-assembly behavior in side-chain liquid crystalline block copolymers which involve interplay between microphase separation and liquid crystalline ordering of side chain mesogenic units. We extend the field theoretic models for block copolymer to account for self-assembly in semicrystalline block copolymers. The semicrystalline chain is modeled as a semiflexible chain having non-bonded attractions between parallel bonds. We characterize the structure formation in such block copolymers as a function of the rigidity of the semicrystalline chain. Then we extend the formalism to study semicrystalline triblock and pentablock copolymers and evaluate bridging fractions in different sequences of semicrystalline multiblock copolymers. Rod-coil block copolymers have a flexible polymer covalently linked to rigid polymer. Such polymers have potential applications as organic LEDs and photovoltaic devices. We study the self-assembly of such block copolymer under confinement. To make these block copolymers viable as photovoltaic devices, we performed the photovoltaic modeling of devices based on self-assembly of block copolymers. We characterize the interplay between self-assembly and anisotropy of charge transport (arising due to rigid polymer chains) in determining the eventual photovoltaic properties.
Download or read book Structure property relationships in some block polymer systems written by Thomas Patrick Lally and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Polymeric Materials written by Gabriel O. Shonaike and published by CRC Press. This book was released on 2003-04-14 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: Featuring contributions from experts at some of the world's leading academic and industrial institutions, Advanced Polymeric Materials: Structure Property Relationships brings into book form a wealth of information previously available primarily only within computer programs. In a welcome narrative treatment, it provides comprehensive coverage of p
Download or read book Structure physical Properties Relationships of Block Copolymers and Polymer Blends written by European Physical Society and published by . This book was released on 1998 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure physical Properties Relationships of Block Copolymers and Polymer Blends written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure property Relationships of Perfectly Alternating Polycarbonate polydimethylsiloxane Block Copolymers written by Solomon Hsing-Kuo Tang and published by . This book was released on 1981 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
