Download or read book Properties and Morphology of Amorphous Hydrocarbon Block Copolymers written by Mitchel Shen and published by . This book was released on 1978 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this review is to discuss the more recent advances in the investigation of the relation between the morphology of block copolymers and their properties. First we shall discuss the thermodynamic conditions under which homogeneous block copolymers can be formed. These homogeneous systems are interesting because their underlying chain dynamics can be treated by the accepted molecular models. Viscoelastic relaxation times computed from these theories are in good agreement with experimental data. Next we present some examples of block copolymer morphologies, taken from the electron micrographs now available in the literature. Statistical theories capable of satisfactorily explaining the observed morphologies are then briefly discussed. Finally the elastic, viscoelastic and rheological properties of these materials are described. In all instances the dominant influence of the microdomain structure on these properties is demonstrated.

Download or read book Block Copolymers written by Nikos Hadjichristidis and published by John Wiley & Sons. This book was released on 2003-04-28 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymers may be classified as either homopolymers, consisting of one single repeating unit, or copolymers, consisting of two or more distinct repeating units. Block copolymers contain long contiguous blocks of two or more repeating units in the same polymer chain. Covering one of the hottest topics in polymer chemistry, Block Copolymers provides a coherent overview of the synthetic routes, physical properties, and applications of block copolymers. This pioneering text provides not only a guideline for developing synthetic strategies for creating block copolymers with defined characteristics, but also a key to the relationship between the physical properties of block copolymers and the structure and dynamics of materials. Covering features of the chemistry and physics of block copolymers that are not found in comparable texts, Block Copolymers illustrates the structure-activity relationship of block copolymers and offers suggestions for the design of specific applications. Divided into five sections-Block Copolymers includes chapters on: * Block Copolymers by Chemical Modification of Precursor Polymers * Nonlinear Block Copolymers * Adsorption of Block Copolymers at Solid-Liquid Interfaces * Theory of Block Copolymer Segregation * Phase Transformation Kinetics * Block Copolymer Morphology * Block Copolymer Dynamics Polymer chemists, physicists, chemical engineers, and materials scientists, as well as graduate students in polymer science, will find Block Copolymers to be an invaluable text.

Download or read book Processing Structure and Properties of Block Copolymers written by M.J. Folkes and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 219 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 Block Copolymers written by Francisco Balta Calleja and published by CRC Press. This book was released on 2000-06-09 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: A summary of block copolymer chemical structures and synthesis. It discusses physical methods of characterization such as computer simulation, microhardness, dielectric spectroscopy, thermal mechanical relaxation, ultrasonic characterization, transmission electron microscopy, X-ray scattering, and NMR, among others. It also outlines rheological and processing parameters in the multiphase polymer systems with stable microstructures.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Block Polymers written by S. L. Aggarwal and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: Block polymers represent another milestone in the preparation of polymers of controlled structure. Catalysts and polymerization methods that allowed the preparation of polymers in which the stereo- and geometric isomerism of the monomer units could be con trolled have indeed been among the major developments in polymer science during the last decade. The synthesis of block polymers, in which the sequence length of the comonomer units can be con trolled, portends equally important developments in the science and technology of polymers. The papers collected in this volume cover primarily the pro ceedings of the most recent symposium on block polymers, sponsored by the Division of Polymer Chemistry of the American Chemical Society. It was held in New York City during the Society's 158th National Meeting in September, 1969. Additional contributions from selected authors were invited especially for this book to achieve the most up-to-date account of the advances that have been made since the development of the thermoplastic elastomers that first brought into focus this important area of research. The first two papers in this volume draw attention to the various problems that should be considered in the preparation of block polymers of precisely defined structure from styrene and butadiene or isoprene by anionic polymerization. Characterization of block polymers presents many problems and there is a paucity of systematic work in this area. Attention has been given to the di lute solution properties of block polymers,however, in one of the papers in this volume.

Download or read book The Effects of Structure and Morphology on the Physical Properties of End Crystallizable Block Copolymers and Polymer Blends written by Wei-Yuan Lin and published by . This book was released on 1983 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Synthesis Mechanical Properties and Morphology of Star Block Copolymers written by Le-Khac Bi and published by . This book was released on 19?? with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multiphase Polymers written by Stuart L. Cooper and published by . This book was released on 1979 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: Good,No Highlights,No Markup,all pages are intact, Slight Shelfwear,may have the corners slightly dented, may have slight color changes/slightly damaged spine.

Download or read book Novel Heat resistant Materials written by Jingjing Xu and published by . This book was released on 2002 with total page 474 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 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 Block Polymers written by American Chemical Society. Meeting and published by . This book was released on 1970 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Block Copolymers written by Ryan H. Diaz and published by Nova Science Publishers. This book was released on 2014-05-14 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Block copolymers constitute a fascinating group of polymeric materials belonging to the ""soft matter"" family. These materials are formed by blocks of polymeric chains from different monomers. In most cases, these blocks are thermodynamically incompatible, but the covalent bonds between them impose specific arrangements, generating particular morphologies both in bulk and in solution. In this book, the authors present current research in the study of the phase morphology, material applications and future challenges of block copolymers. Topics discussed include the different experimental skill.

Download or read book Amorphous crystalline Brush Block Copolymers written by Gayathri Kopanati and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Bottlebrush block copolymers are polymers with chemically distinct polymer side chains grafted onto a common backbone. The unique architecture induced properties make these materials attractive for applications such as photonic materials, stimuli responsive actuators and drug delivery vehicles to name a few. This dissertation primarily investigates the phase transitions and rheological behavior of amorphous-crystalline bottlebrush brush block copolymers and their composites. The temperature induced phase behavior is investigated using time resolved synchrotron X-ray source. Irrespective of volume fraction and backbone length, the samples display strong segregation even at high temperatures (200 °C) and there is no accessible order-disorder transition in the temperature range of 25-200 °C. The isothermal crystallization kinetics reveal a two-stage crystallization process, different than that observed in linear block copolymers. A considerable part of this dissertation is focused on the study of the effect of hydrogen bonding additives on the relaxations of brush block copolymer. The additives greatly enhance the mechanical and physical properties of the pristine polymer. The small molecules also impart a gel-like characteristic due to the formation of physically crosslinked network. Finally, the understanding of the brush block copolymer systems from the previous studies and literature is used to study the self-assembly of nanorods using brush block copolymers as templates.

Download or read book Morphology and Properties of Model Block and Graft Copolymers written by and published by . This book was released on 2005 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: For this project a number of new polymer materials were synthesized including trifunctional, tetrafunctional and hexafunctional regular graft copolymers. Additionally, a range of poly(cyclohexadiene) (PCHD) homopolymers and block copolymers containing PCHD blocks were prepared. The morphologies of the regular graft copolymers, and PCHD containing block copolymers were determined by TEM and SAXS. Additionally, the morphologies of cyclic block copolymers were studied and compared to their linear analogs. The tensile mechanical properties of the regular multigraft materials were studied and related to molecular architecture. It was found that increasing junction point functionality and increasing number of junction points per molecule increased strength and toughness, and decreased hysterysis. A series of block double graft (BDG) copolymers of unique molecular architecture were studied to relate molecular architecture to morphology and mechanical properties. The mechanical properties of some BDG materials compared favorably to commercial thermoplastic elastomers.

Download or read book Polymer Morphology written by Qipeng Guo and published by John Wiley & Sons. This book was released on 2016-03-21 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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