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Author : Eleni Karayianni
Publisher :
ISBN 13 :
Total Pages : 436 pages
Book Rating : 4.:/5 (89 download)
Download or read book Investigation of the Association Behavior of Ionomer Solutions written by Eleni Karayianni and published by . This book was released on 1995 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Saumitra Bhargava
Publisher :
ISBN 13 :
Total Pages : 596 pages
Book Rating : 4.:/5 (422 download)
Download or read book Shear-thickening Behavior of Ionomer Solutions written by Saumitra Bhargava and published by . This book was released on 1999 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : M.R. Tant
Publisher : Springer Science & Business Media
ISBN 13 : 940091461X
Total Pages : 524 pages
Book Rating : 4.4/5 (9 download)
Download or read book Ionomers written by M.R. Tant and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymers have achieved an enviable position as the class of materials having the highest volume of production, exceeding that of both metals and ceramics. The meteoric rise in the production and utilization of polymers has been due to advances in polymer synthesis which allow the creation of specific and well-defined molecular structures, to new knowledge concerning the relationships between polymer structure and properties, and to an improved understanding of how processing can be used as a tool to develop morphological features which result in desired properties. Polymers have truly become 'engineered materials' in every sense of the term. Polymer scientists and engineers are forever seeking to modify and improve the properties of synthetic polymeric systems for use in specific applications. Towards this end they have often looked to nature for advice on how to design molecules for specific needs. An excellent illustration of this is the use of noncovalent bonding (ionic, hydrogen, and van der Waals) in lipids, proteins, and nucleic acids, where these noncovalent bonds, acting both intra and intermolecularly, precisely control the structure and thus the function of the entire system. The utilization of ionic bonding, in particular in man-made polymers has attracted widespread interest in recent years, since ionic interactions exert a similar strong influence on the structure and properties of these synthetic systems.
Author : Michel Pineri
Publisher : Springer Science & Business Media
ISBN 13 : 9400938292
Total Pages : 579 pages
Book Rating : 4.4/5 (9 download)
Download or read book Structure and Properties of Ionomers written by Michel Pineri and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ionomers, that is polymers containing a low concentration of charged units along the chain, have been the subject of increasing interest during the past twenty years. The presence of ionic groups in the poly mer changes some of its properties dramatically. Increases in the modu lus and the viscosity of several orders of magnitude have been observed, and changes in the glass transition of hundreds of degrees are possible. In addition, diffusion coefficients can be modified drastically. These changes are due primarily to the presence of reversible ionic cross links in these materials. Because of the low dielectric constant of most organic polymers, the ions or ionic dipoles tend to aggregate ; this aggregation process, however, is limited, because the ionic groups are covalently bonded to the organic chain. Host of the fundamental research done on these materials has been devoted to a determination of the extent of association, the structure of the aggregates, the limi ting factors, and the correlations between molecular and supermolecular structure and the resul ting properties.
Author : Shulamith Schlick
Publisher : CRC Press
ISBN 13 : 9780849376481
Total Pages : 326 pages
Book Rating : 4.3/5 (764 download)
Download or read book Ionomers written by Shulamith Schlick and published by CRC Press. This book was released on 1996-01-15 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: The molecular structure and composition of ionomers lead to a complex superposition of properties of organic chains and of polyelectrolytes. The potential use of this class of polymers in applications such as surfactants, ion selective membranes in electrochemical processes, coatings, fuel cells and batteries has sparked a vast amount of research.
Author : Kaushik Chakrabarty
Publisher :
ISBN 13 :
Total Pages : 276 pages
Book Rating : 4.:/5 (374 download)
Download or read book Characterization of Ionomer Solutions in Non-polar Solvents written by Kaushik Chakrabarty and published by . This book was released on 1997 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Tsetska Radeva
Publisher : CRC Press
ISBN 13 : 1482270684
Total Pages : 936 pages
Book Rating : 4.4/5 (822 download)
Download or read book Physical Chemistry of Polyelectrolytes written by Tsetska Radeva and published by CRC Press. This book was released on 2001-02-21 with total page 936 pages. Available in PDF, EPUB and Kindle. Book excerpt: An examination of the fundamental nature of polyelectrolytes, static and dynamic properties of salt-free and salt-added solutions, and interactions with other charged and neutral species at interfaces with applications to industry and medicine. It applies the Metropolis Monte Carlo simulation to calculate counterion distributions, electric potentia
Author : American Chemical Society. Division of Polymer Chemistry
Publisher :
ISBN 13 :
Total Pages : 764 pages
Book Rating : 4.3/5 (91 download)
Download or read book Papers Presented at the ... Meeting written by American Chemical Society. Division of Polymer Chemistry and published by . This book was released on 1998 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 456 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author : Miko Cakmak
Publisher : John Wiley & Sons
ISBN 13 : 1119535743
Total Pages : 388 pages
Book Rating : 4.1/5 (195 download)
Download or read book Polyester Films written by Miko Cakmak and published by John Wiley & Sons. This book was released on 2023-07-04 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents a comprehensive review of key aspects of polyester film technology, ranging from first principles to practical applications Bringing together world-class experts to review the state-of-the-art of key materials and processing elements of polyester film technology, Polyester Films covers a wide range of topics with direct utility to students, practitioners, business managers and researchers, in academia and industry. Topics covered in this volume include survey of optical and physical properties, microlayer coextrusion, polyester ionomers, polyester blends, biomedical applications and recycling . In particular, the text focuses on novel design and application of polyester films, such as those used in the production of flat panel displays, flexible electronics, and barrier films. The overriding objective of the book is to scope the multitude of options available to material and product designers in manipulating the properties of polyester films to meet specific performance and product criteria. These options include synthetic modifications (copolymerization), physical enhancements (blending), and process upgrades (tenter-frame changes, coextrusion, and coating). Edited by two highly qualified material scientists with extensive experience in academia and industry, Polyester Films covers topics such as: Historical review of polyester film technology Overview of physical performance and applications of key polyester films, especially PET and PEN Synthetic options available for manipulating the structure and properties of polyesters, with special focus on polyester ionomers Main blending options available to enhance the performance of commodity polyesters Rheo-optical properties of polyester films and corresponding testing methodology Micro-layer coextrusion technology as applied to modify the performance of polyester films Bio-medical applications Polyester recycling, with special focus on upcycling With an interdisciplinary approach covering the performance of real-life products and components, Polyester Films is an essential resource for researchers and engineers in academia and industry working in physics, material science, chemistry and process engineering. This volume should also be invaluable for graduate students and early-career researchers in similar fields.
Author : Dr. P. Pazhanisamy
Publisher : Laxmi Book Publication
ISBN 13 : 1312081082
Total Pages : 84 pages
Book Rating : 4.3/5 (12 download)
Download or read book SOLUTION BEHAVIOR OF QUATERNARY AMMONIUM IONOMERS written by Dr. P. Pazhanisamy and published by Laxmi Book Publication. This book was released on 2023-09-30 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ion-containing polymers are perhaps the most versatile and application oriented polymeric materials that have developed in the recent past. They have proven utility in solving solid/liquid separation problems related to water pollution and are used extensively in paper manufacturing, textile finishes, oil production, plastics, coatings, biomedical applications, etc1-6. Cationic quaternary polyelectrolytes have manifold applications. They are used as primary coagulants, flocculants, oil conditioners, hair sprays, shampoo additives, grease thickness, biocides, emulsifiers, strengthening agents for fabric and paper, sensitizer for photographic film, printing inks, etc7-10.In general ion-containing polymers are referred to as “polyelectrolytes” when they have sufficient ionic charge (cationic or anionic) to be soluble11 for as “ionomers” when the concentration of ionic group is low12. Now the term ionomer is used to denote polymers with higher ionic group are classified as polyelectrolytes13.
Author : Mahdi Ghelichi Ghalacheh
Publisher :
ISBN 13 :
Total Pages : 137 pages
Book Rating : 4.:/5 (112 download)
Download or read book Molecular Modeling of Structural Transformations in Ionomer Solutions and Membranes written by Mahdi Ghelichi Ghalacheh and published by . This book was released on 2016 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: Different functions are expected from the polymer electrolyte membranes used in fuel cells. They work as a proton conduction medium, as a separator, and as an electronic insulator. The current membrane materials of choice are perfluorosulfonic acid (PFSA) ionomers such as Nafion. The two main challenges that PFSAs still face, after three decades of extensive research, are a limited lifetime and a lack of basic structural understanding. To investigate the chemical degradation phenomena, we devised a kinetic model of radical formation and attack to PFSA ionomers. Analytical relations are derived to obtain the content of aggressive radicals as a function of iron ion content and hydrogen peroxide. The mean-field type, coarse-grained ionomer model distinguishes ionomer headgroups, side chains, and ionomer backbone. The model is used to study the impact of different degradation mechanisms and ionomer chemistries on PEM degradation. Application of the model to degradation data of various PFSAs highlights the important role of radical attack to the ionomer headgroups. The insufficient understanding of the membrane structure thwarts further forays in degradation modeling. To this end, we undertook molecular dynamics simulations of the conformation of single chain ionomers as a function of different structural parameters. This study revealed the nonmonotonic effect of the side chain length and density on the conformational behaviour and rigidity of ionomer backbones. We discuss how the changes in these architectural parameters change the ionomer affinity to counterions and the corresponding ion mobility. Studying the aggregation of ionomer chains revealed their spontaneous aggregation in dilute solution. We explored the effect of various parameters such as ionomer hydrophobicity and side chain content on ionomer bundle formation. Minimization of the surface free energy of hydrophobic backbones is the driving force of ionomer aggregation, while the repulsion of anionic headgroups opposes the aggregation. The results rationalize the experimental studies and highlight the role ionomer bundles as the prevailing structural motif in PFSA materials.
Author : Paul Dubin
Publisher : Springer Science & Business Media
ISBN 13 : 3642784690
Total Pages : 368 pages
Book Rating : 4.6/5 (427 download)
Download or read book Macromolecular Complexes in Chemistry and Biology written by Paul Dubin and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current book describes the chemical and physical behavior of polymers and biopolymers that form highly associating structures in equilibrium solution. It summons the established results known of polymer complexes in solution taking into account also the recent developments in biotechnology concerning this topic, in technological applications of polymer-protein interactions, in fluorescence and scattering techniques for the study of intra- and interpolymer association and in the study of ionomers in solution. The book covers the whole range from synthesis and fundamental aspects to applications and technology of associated polymers.
Author : J. Edward Glass
Publisher :
ISBN 13 :
Total Pages : 442 pages
Book Rating : 4.3/5 (91 download)
Download or read book Associative Polymers in Aqueous Media written by J. Edward Glass and published by . This book was released on 2000 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of this volume is on surface active agents and their applications, including: coatings, detergents, water treatment, and petroleum recovery. It is an update on this area of significant industrial importance and includes reviews of work done in areas such as ethelyene oxide block copolymers, acrylic acid block copolymers, living free radical polymerizations, HMPAM and HEURs in flow, and fluorescence studies of associative thickeners, among others.
Author : Masanori Hara
Publisher : CRC Press
ISBN 13 : 9780824787592
Total Pages : 416 pages
Book Rating : 4.7/5 (875 download)
Download or read book Polyelectrolytes written by Masanori Hara and published by CRC Press. This book was released on 1992-11-12 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aims to provide in-depth coverage of recent advances in all important areas of polyelectrolyte research and applications. Topics covered in this text include scaling theory, dynamic light scattering, neutron scattering, biopolymers and ionomers.
Author : American Chemical Society. Meeting
Publisher :
ISBN 13 :
Total Pages : 1282 pages
Book Rating : 4.:/5 (45 download)
Download or read book Book of Abstracts written by American Chemical Society. Meeting and published by . This book was released on 1987 with total page 1282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Yexuan Lu
Publisher :
ISBN 13 :
Total Pages : 29 pages
Book Rating : 4.:/5 (99 download)
Download or read book Conductivity Behavior of Ionomers and Ionic Liquids in Non-aqueous Solutions written by Yexuan Lu and published by . This book was released on 2017 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: The conductivity behavior of ionomers and ionic liquids in non-aqueous solvents was studied. Ionic liquids (BMIM-PF6 and EMIM-TF) were dissolved in polar (DMF) and non-polar (THF) solvents and solution conductivity was measured. When dissolved in a polar solvent, ionic groups in ionic liquids stayed as electrolytes, which resulted in the high conductivity of the solution in DMF. The conductivity measurement was also carried out on the systems of polymers (SPS-Na ionomer, PS, and PMMA) and an ionic liquid (BMIM-PF6) dissolved in DMF and THF, respectively. Regardless of the types of polymers, all the solutions in DMF showed the same conductivity, which was identical to that of the pure ionic liquid in DMF. However, when the solvent was switched to THF, the conductivity of the solution containing both ionic liquid and ionomer was negligible compared to the other solutions. This change in conductivity was due to the aggregation between ionomer and ionic liquid in a non-polar solvent (THF). In order to further investigate the effect of the solvent polarity on the solution conductivity with both ionic liquid and ionomer, ionomer was dissolved in a series of DMF/THF solvent mixtures and the ionic liquid was added. At the same concentration of the ionic liquid, the solution conductivity increased with increasing the content of DMF. This phenomenon suggests that the ionic groups tend to dissociate in the high-polarity solvent and associate in the low-polarity solvent.
