Download or read book Molecular Design Synthesis Characterization and Processing of Liquid Crystalline Diblock Copolymers written by Guoping Mao and published by . This book was released on 1997 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrogen bonded Side Chain Liquid Crystalline Block Copolymer written by Chi-Yang Chao and published by . This book was released on 2003 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Liquid Crystals Volume 3 written by Dietrich Demus and published by John Wiley & Sons. This book was released on 2008-08-29 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Handbook of Liquid Crystals is a unique compendium of knowledge on all aspects of liquid crystals. In over 2000 pages the Handbook provides detailed information on the basic principles of both low- and high-molecular weight materials, as well as the synthesis, characterization, modification, and applications (such as in computer displays or as structural materials) of all types of liquid crystals. The five editors of the Handbook are internationally renowned experts from both industry and academia and have drawn together over 70 leading figures in the field as authors. The three volumes of the Handbook are designed both to be used together or as stand-alone reference sources. Some users will require the whole set, others will be best served with one or two of the volumes. Volume 1 deals with the basic physical and chemical principles of liquid crystals, including structure-property relationships, nomenclature, phase behavior, characterization methods, and general synthesis and application strategies. As such this volume provides an excellent introduction to the field and a powerful learning and teaching tool for graduate students and above. Volume 2 concentrates on low-molecular weight materials, for example those typically used in display technology. A high quality survey of the literature is provided along with full details of molecular design strategies, phase characterization and control, and applications development. This volume is therefore by far the most detailed reference source on these industrially very important materials, ideally suited for professionals in the field. Volume 3 concentrates on high-molecular weight, or polymeric, liquid crystals, some of which are found in structural applications and others occur as natural products of living systems. A high-quality literature survey is complemented by full detail of the synthesis, processing, analysis, and applications of all important materials classes. This volume is the most comprehensive reference source on these materials, and is therefore ideally suited for professionals in the field.
Download or read book Liquid Crystal Polymer Systems written by Polymer Science Workshop (6 ; 1983 ; K09 ; Lyngby, Danemark) and published by . This book was released on 1983 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Liquid Crystals High Molecular Weight Liquid Crystals written by Dietrich Demus and published by Wiley-VCH. This book was released on 1998-04-15 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Handbook of Liquid Crystals is a unique compendium of knowledge on all aspects of liquid crystals. In over 2000 pages the Handbook provides detailed information on the basic principles of both low- and high-molecular weight materials, as well as the synthesis, characterization, modification, and applications (such as in computer displays or as structural materials) of all types of liquid crystals. The five editors of the Handbook are internationally renowned experts from both industry and academia and have drawn together over 70 leading figures in the field as authors. The three volumes of the Handbook are designed both to be used together or as stand-alone reference sources. Some users will require the whole set, others will be best served with one or two of the volumes. Volume 1 deals with the basic physical and chemical principles of liquid crystals, including structure-property relationships, nomenclature, phase behavior, characterization methods, and general synthesis and application strategies. As such this volume provides an excellent introduction to the field and a powerful learning and teaching tool for graduate students and above. Volume 2 concentrates on low-molecular weight materials, for example those typically used in display technology. A high quality survey of the literature is provided along with full details of molecular design strategies, phase characterization and control, and applications development. This volume is therefore by far the most detailed reference source on these industrially very important materials, ideally suited for professionals in the field. Volume 3 concentrates on high-molecular weight, or polymeric, liquid crystals, some of which are found in structural applications and others occur as natural products of living systems. A high-quality literature survey is complemented by full detail of the synthesis, processing, analysis, and applications of all important materials classes. This volume is the most comprehensive reference source on these materials, and is therefore ideally suited for professionals in the field.
Download or read book Molecular Interactions and Time Space Organization in Macromolecular Systems written by Yotaro Morishima and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural organization or disorganization in macromolecular systems has been an important subject of polymer physical chemistry during the last one or two decades. This volume summarizes the main lectures presented at the Osaka University Macromolecular Symposium OUMS '98 on Molecular Interactions and Time-Space Organization in Macromolecular Systems, where the following topics were discussed:crystallization kinetics, liquid crystals, phase separation, gelation, adhesion, complex formation, and self-organization, with emphasis on molecular interactions. Both these topics are hot issues at present and frequently are taken up as a main theme at a particular symposium. The present symposium invited leading theorists and experimentalists in these fields as guest speakers and is expected to attract the interest of a significant range of readers.
Download or read book Liquid Crystal Polymer Systems written by Polymer Science Workshop (6 ; 1983 ; K09 ; Lyngby, Danemark) and published by . This book was released on 1983 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liquid Crystalline Rod coil Block Copolymers by Stable Free Radical Polymerization written by Padma Gopalan and published by . This book was released on 2002 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Synthesis and Characterization of Polystyrene Liquid Crystalline Siloxane Block Copolymers written by Aaron J. Moment and published by . This book was released on 2000 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Engineering of Hybrid Liquid Crystalline Brush like Block Copolymers Hierarchical Self assembly and Application in Photonics written by Lalit H. Mahajan and published by . This book was released on 2018 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manipulating molecular and supramolecular cooperative interactions to introduce another level of assembly along with block copolymer superstructures has been an important area of research resulting in materials with multiple functionalities. With the aim of attaining hierarchical structures and stimuli responsive multi-functional materials, we introduce a molecularly designed architecture, Liquid Crystalline Brush-like Block Copolymers (LCBBCs), where polymer scaffolds comprising side chain liquid crystalline moieties and brush-like semicrystalline side chains within block or random architecture are introduced. Combination of two architectures can bring the unique conjunction of properties such as i) liquid crystalline order and its stimuli responsive function (magnetic, thermal, light and mechanical stimuli responsive) on the macroscopic scale ii) larger domain sizes (> 100 nm) and faster assembly dynamics of brush-like side chains iii) proximity of order-disorder transition temperature (TODT) and liquid crystalline transition temperature (Tcl) to aid in directed hierarchical self-assembly. This dissertation focuses on the 1) fundamental understanding of LCBBC self-assembly and phase behavior as a function of composition and molecular weight 2) harnessing stimuli responsive functional properties of cholesteric random copolymeric version of the same architecture to obtain multifunctional photonic elastomeric platform. In first part of dissertation, I describe molecular design-synthesis and characterization of LCBBC architecture comprising norbornene functionalized a) cyanobiphenyl liquid crystalline mesogens with twelve methylene spacer b) semi-crystalline polylactide (PLA) side chains. Morphological variety as a function of composition and dependence of domain spacing on the overall molecular weight is discussed to systematically understand the phase behavior. This architecture exhibits morphology analogous to linear-side chain LC block copolymers and perhaps some characteristics of bottlebrush architecture yielding > 100 nm domain sizes at higher Mn. In second part, I describe the molecular design-synthesis and characterization of cholesteric random terpolymer architecture to obtain elastomeric photonic platform with shape memory properties. Terpolymer scaffold self-assembles to give a hierarchical structure containing helical cholesteric mesogens along with amorphous microphase segregated domains of PEG brush-like side chains. Synergistic assembly of achiral co-monomers along with cholesteric helices yields tunable photonic reflections as a function of composition. Two-way crosslinking strategy is utilized to obtain patternable elastomeric platform with tunable photonic properties.
Download or read book Liquid crystalline Polymers written by American Chemical Society. Meeting and published by . This book was released on 1990 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume explores the creation, study, and processing of new liquid-crystalline polymers. It covers not only the chemistry of liquid-crystalline polymers, but also the physics and engineering aspects of these materials. A wide range of topics is covered, including syntheses of main-chain and side-chain LCPs, structural characterization of LP, rheology and processing, and applications such a electro-optics and "self-reinforcing" blends. This book presents a broad view of the direction of LCP research in both industry and academe.
Download or read book American Doctoral Dissertations written by and published by . This book was released on 2000 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Platform of Functional Liquid Crystalline Copolymers Synthesis Morphology Properties and Applications written by Dennis Ndaya and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The design of novel, complex and tailored macromolecules that present and combine unique features such as stimuli responsive, self-assembly and hierarchical architectures for applications in fields ranging from healthcare, energy to engineering, is one of the major challenges that need to be addressed by a polymer chemist. One way to address this, is through the combination of monomers with desirable roles such as stimuli responsive (liquid crystalline), solubility (polar or non-polar), targeting and payload release functional monomers. Polymerization techniques such as controlled and living polymerization enables the regulation of the connectivity and composition of these diverse monomers in the synthesis of block, random or gradient copolymers. Ring-opening metathesis polymerization (ROMP) majorly employed in most of the work in this thesis, is a robust living polymerization technique which delivers highly functionalized block or random copolymers that serves as nanotemplates (chapter 2), nanoporous membranes for separation (chapter 3), photonic crystals (chapter 4), shape memory devices (chapter 5), stimuli responsive optical materials (chapter 6), drug delivery vehicles and imaging agents (chapter 7). This dissertation focuses on a new platform for the synthesis of novel liquid crystalline polymers, their architectures, morphologies, properties and applications. The control of composition and polymer architecture is key in tuning the properties of copolymers for desired applications. Side-chain Liquid Crystalline Copolymers (SCLPs) which combines the basic properties of conventional polymers and liquid crystals, exhibit low viscosity, unique self-assembly as compared to linear copolymer counterparts due to reduced entanglements. Liquid crystalline block copolymers (LCBCPs) that comprises of brush-like semicrystalline or amorphous units and comblike side chain liquid crystalline moieties will be the center of focus in this dissertation in chapter 2, chapter 4 and part of chapter 7 due to formation of hierarchical structures as a result of two competing processes: (a) microphase separation by the copolymer superstructure and (b) orientational ordering by liquid crystalline mesogens. This supramolecular cooperative assembly leads into a well-defined interface with liquid crystalline ordering in the range of 3 -10nm nanostructures and block microphase segregation of 10- 100nm microstructures. The first part of this dissertation focuses on the understanding of liquid crystalline brush-like block copolymers self-assembly, phase behavior and morphology as a function of copolymer composition and molecular weight. Here, I describe the synthesis and characterization of norbornene functionalized side chain liquid crystalline brush-like block copolymers, where one of the blocks comprises of cyanobiphenyl liquid crystalline mesogens with twelve methylene spacer and the other semi-crystalline polylactide (PLA) side chains. The self-assembly of these LC block copolymers into liquid crystalline mesophase provides the handle for magnetic alignment of the formed LCBBCs superstructures (chapter 7). The displayed morphologies such as hexagonally packed PLA cylinders in the LC matrix is put into use in the creation of functional nanoporous membranes for water purification and heavy metal sequestering (chapter 3). The high molecular weight of this LCBBCs assemble into photonic crystals of large domain sizes with different optical properties (chapter 4). In the second part of the dissertation we explore harnessing of stimuli responsive functional cholesteric random copolymers for multifunctional elastomeric platform and optical materials that cover a wide range from visible to near infrared (NIR) of electromagnetic spectrum. Overall, understanding the structure-properties of these liquid crystalline polymers leads to various applications such as membranes for separation, optics, sensors and drug delivery.
Download or read book Molecular Engineering of Liquid Crystalline Polymers by Living Polymerization 23 Synthesis and Characterization of AB Block Copolymers written by and published by . This book was released on 1992 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes the synthesis and characterization of AB block copolymers based on w-((4-cyano-4'-biphenyl)oxy)alkyl vinyl ether (6-n) with alkyl being ethyl (6-2), propyl (6-3), nonyl (6-9) and undecanyl (6-11) with 1H, 1H, 2H, 2H-perfluorodecyl vinyl ether (CF8), poly(6-n)-b-CF8)X/Y (where X/Y refers to the weight ratio of the two segments), and of 2-(4-biphenyloxy)ethyl vinyl ether (BEVE) with 1H, 1H, 2H, 2H-perfluoeodecyl vinyl ether, poly(BEVE-b- CF8)X/Y. They were prepared by living cationic polymerization and exhibit a narrow molecular weight distribution. All block copolymers display a microphase separated morphology when the A segment is in the liquid crystalline phase. Block copolymers based on 6-2, 6-3 and BEVE with CF8 exhibit a microphase separated morphology also in the melt phase of A and B block.
Download or read book Molecular Engineering of Liquid Crystal Polymers by Living Polymerization 14 Synthesis and Characterization of Binary Copolymers of Omega 4 Cyano 4 Biphenyl oxyAlkyl Vinyl Ethers Containing Undecanyl and Hexyl Pentyl and Propyl and Undecanyl and Propyl Pairs of Alkyl Groups written by and published by . This book was released on 1991 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: Copolymerization represents the simplest synthetic technique which can be used to tailor make phase transitions of both main chain and side chain liquid crystalline polymers. Indeed, copolymerization was frequently employed to manipulate the phase transitions of side chain liquid crystalline polymers. However, most of the results reported in the literature can be considered only in a qualitative way, since there are only very few cases in which information about both copolymer composition and molecular weight are available. A general classification of side chain liquid crystalline copolymers was recently discussed in a review article. There are two main classes of side chain liquid crystalline copolymers. The first one refers to copolymers containing pairs of structural units with and without mesogenic units. This class of copolymers was extensively investigated. The second class refers to copolymers based on pairs of structural units containing mesogenic units in each one.
Download or read book Synthesis and Characterization of Polystyrene Polysiloxane Side Chain Liquid Crystalline Diblock Copolymers written by Aaron J. Moment and published by . This book was released on 1998 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1979 with total page 1096 pages. Available in PDF, EPUB and Kindle. Book excerpt:
