Download or read book Miscibility Study of Polyolefin Blends written by Lierni Oiarzabal and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Miscibility Study of Polyolefin Blends written by and published by . This book was released on 1993 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polyolefin Blends written by Domasius Nwabunma and published by John Wiley & Sons. This book was released on 2008-01-02 with total page 689 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive reference on the properties and applications of polyolefin blends Polyolefins account for more than half of total plastics consumption in the world. In recent years, usage of and research on polyolefin blends have increased significantly due to new applications in medicine, packaging, and other fields and the development of novel polyolefins. With a special emphasis on nano- and micro-structures of crystals and phase morphology, Polyolefin Blends condenses and consolidates current information on polyolefins so that the reader can compare, select, and integrate a material solution. Focusing exclusively on the fundamental aspects as well as applications of polyolefin blends, this authoritative reference: * Features an introductory chapter that serves as a guide to polyolefin blends * Includes chapters covering formulation design, processing, characterization, modeling and simulation, engineering performance properties, and applications * Covers polyolefin/polyolefin blends and polyolefin/non-polyolefin blends * Discusses miscibility, phase behavior, functionalization, compatibilization, microstructure, crystallization, hierarchical morphology, and physical and mechanical properties * Covers new research trends including in-situ reactor blending and reactive processing, such as compatibilization/functionalization in the melt * Contains practical examples from open literature sources and commercial products With chapters contributed by leading experts from several countries, this is a must-have reference for scientists and engineers conducting research on polyolefin blends and for professionals in medical, packaging, and other commodity fields. It is also an excellent text for graduate students studying polymer science and polymer processing.
Download or read book Characterization of Polymer Blends written by Sabu Thomas and published by John Wiley & Sons. This book was released on 2015-02-09 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filling the gap for a reference dedicated to the characterization of polymer blends and their micro and nano morphologies, this book provides comprehensive, systematic coverage in a one-stop, two-volume resource for all those working in the field. Leading researchers from industry and academia, as well as from government and private research institutions around the world summarize recent technical advances in chapters devoted to their individual contributions. In so doing, they examine a wide range of modern characterization techniques, from microscopy and spectroscopy to diffraction, thermal analysis, rheology, mechanical measurements and chromatography. These methods are compared with each other to assist in determining the best solution for both fundamental and applied problems, paying attention to the characterization of nanoscale miscibility and interfaces, both in blends involving copolymers and in immiscible blends. The thermodynamics, miscibility, phase separation, morphology and interfaces in polymer blends are also discussed in light of new insights involving the nanoscopic scale. Finally, the authors detail the processing-morphology-property relationships of polymer blends, as well as the influence of processing on the generation of micro and nano morphologies, and the dependence of these morphologies on the properties of blends. Hot topics such as compatibilization through nanoparticles, miscibility of new biopolymers and nanoscale investigations of interfaces in blends are also addressed. With its application-oriented approach, handpicked selection of topics and expert contributors, this is an outstanding survey for anyone involved in the field of polymer blends for advanced technologies.
Download or read book Polyolefin Miscibility Solid State NMR Investigation of Phase Behavior in Saturated Hydrocarbon Blends written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyolefin blends represent a vital material field due to their economic and commercial importance. Potential new properties such as lighter weight, lower cost and higher strength, motivate research to investigate blends of saturated hydrocarbon polymers. However, many questions remain concerning how polymer chain structure and packing influence local thermodynamics, or more specifically, the interplay between enthalpy and entropy, which ultimately control bulk phase behavior. Solid-state NMR has proven to be an essential tool in these studies due to its ability to selectively observe molecular level conformations and dynamics without isotopic labeling. Combinations of basic and advanced variable temperature studies such as 1D and 2D 13C cross-polarization exchange experiments, static 2H lineshape analysis, 1H relaxation/spin-diffusion measurements, and 129Xe experiments were applied in this work. Several systems were studied, including 50/50 weight percent blends of polyisobutylene with polyethylene-co-1-butene, polyisobutylene with head-to-head polypropylene, and atactic polypropylene with the same polyethylene-co-1-butene samples. The results were used to determine a relationship between miscibility, length scales of mixing, and timescales/length scales of the glass transition.
Download or read book Influence of Monomer Structures on the Miscibility of Polyolefin Blends written by Jacek Dudowicz and published by . This book was released on 1996 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Polyolefins written by Cornelia Vasile and published by CRC Press. This book was released on 2000-06-21 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt: A handbook on polyolefins. This second edition includes new material on the structure, morphology and properties of polyolefin (PO) synthesis. It focuses on synthetic advances, the use of additives, special coverage of PO blends, composites and fibres, and surface treatments. It also addresses the problem of interfacial and superficial phenomena.
Download or read book Miscibility Enhancement in Polyisoprene Polyolefin Block Copolymers and Polymer Blends written by Sravya Jangareddy and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The growing awareness within the polymer science community that commercially viable materials can be developed by melt mixing already existing ones led to an interest to explore ways that improve miscibility between known polymers. This strategy allows for savings in research and development of new materials with equivalent properties, and for faster development time. This dissertation seeks to assist this endeavor by presenting a simple chemical modification method to enhance compatibility in classic polydiene-polyolefin systems.The foremost commercial application of polyisoprene, a polydiene that is the synthetic equivalent of natural rubber, is tire manufacture. If mixed well, saturated polybutadiene (hPB), a well-known polyolefin, can impart thermo-oxidative stability and improved gas-barrier properties to polyisoprene. However, polyisoprene and hPB are incompatible due to structural differences. Selectively saturated block copolymers prepared via living anionic polymerization showed significant improvement in polyisoprene/hPB compatibility (characterized by >50% decrease in interaction energy density, X) on randomly incorporating small amounts of styrene into the hPB chain. Moreover, the variation of block copolymer interaction energy with styrene content could be accurately predicted by standard mixing models like the regular mixing model and the copolymer equation model, at all levels of styrene incorporation. Analogous polymer blends displayed similar thermodynamic behavior, after correcting for fluctuation and end-group effects that become significant at low molecular weights. This similarity suggested that X is a segment-level parameter, independent of mixture architecture, as predicted by fundamental mixing theories.The polar modifier used for styrene-butadiene random copolymerization was evaluated for efficacy in randomizing the butadiene sequence with other styrenic monomers like 4-methylstyrene, 4-t-butylstyrene, and 4-vinylbiphenyl, to potentially expand the roster of species that could aid in PI/hPB compatibility enhancement. This modifier is effective in randomizing the 4-methylstyrene/butadiene sequence but proved to be ineffective for the others. This result was utilized to investigate polyisoprene-containing block copolymer thermodynamics in systems where 4-methylstyrene was incorporated into the hPB chain, instead of styrene. These block copolymers exhibited >25% decrease in X on incorporating ~25 wt% 4-methylstyrene, but the interaction energy variation with composition could not be accurately predicted by the regular mixing model or the copolymer equation model.
Download or read book Polymer Blends Handbook written by L. A. Utracki and published by . This book was released on 2014-01-31 with total page 1800 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by an international group of highly respected contributors, this fundamental reference work covers all aspects of polymer blends: science, engineering, technology and applications.
Download or read book Polyolefin Blend Miscibility written by Lance Wayne Gill and published by . This book was released on 2012 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Co crystallization and Miscibility Studies of Ultra high Molecular Weight Polyethylene Blends written by Parimal Vadhar and published by . This book was released on 1985 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Miscibility and Structure Property Relationships in Some Novel Polyolefins written by Akshay R. Kamdar and published by . This book was released on 2009 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the first chapter, miscibility of homogeneous propylene/ethylene (P/E) copolymers of relatively narrow molecular weight distribution was studied as a function of constituent comonomer content. Polymers with up to 31 mol% ethylene were blended in pairs in order to vary the comonomer content difference. Copolymers of molecular weight about 200 kg/mol were miscible if the difference in ethylene content was less than about 18 mol%, and immiscible if the ethylene content difference was greater than about 20 mol%. Blends with constituent composition difference in the range of 18 20 mol% exhibited partial miscibility in the melt. In the second chapter, the effect of chain microstructure on the miscibility and phase behavior of ethylene-octene (EO) copolymer blends was studied. Binary blends of two statistical copolymers (EO/EO blends) that differed in comonomer content were compared with blends of an EO with an olefinic blocky ethylene-octene copolymer, OBC (EO/OBC blends). Two EOs of molecular weight about 100 kg/mol were miscible if the difference in octene content was less than about 10 mol% and immiscible if the octene content difference was greater than about 13 mol%. The blocky nature of the OBCs reduced the miscibility and broadened the partial miscibility window of EO/OBC blends compared to EO/EO blends. The EO/OBC blends were miscible if the octene content difference was less than 7 mol% and immiscible above 13 mol% octene content difference. In the third chapter, the adhesion of some ethylene-octene copolymers to polypropylene (PP) and high density polyethylene (HDPE) was studied in order to evaluate their suitability as compatibilizers for PP/HDPE blends. A one-dimensional model of the compatibilized blend was fabricated by layer-multiplying coextrusion. The microlayered tapes consisted of many alternating layers of PP and HDPE with a thin tie-layer inserted at each interface. The thickness of the tie-layer varied from 0.1 to 14 microns, which included thicknesses comparable to those of the interfacial layer in a compatibilized blend. A blocky copolymer (OBC) consistently exhibited better adhesion to PP than statistical copolymers (EO). Inspection of the crack-tip damage zone revealed a change from a continuous plastic damage zone in tie-layers 2 microns or thicker to a highly fibrillated damage zone in thinner tie-layers.
Download or read book Polyolefin Blends with Immiscible Polymers written by David Alan Jarus and published by . This book was released on 2002 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polyolefin Compounds and Materials written by Mariam Al-Ali AlMa'adeed and published by Springer. This book was released on 2015-12-23 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes industrial applications of polyolefins from the researchers' perspective. Polyolefins constitute today arguably the most important class of polymers and polymeric materials for widespread industrial applications. This book summarizes the present state of the art. Starting from fundamental aspects, such as the polymerization techniques to synthesize polyolefins, the book introduces the topic. Basic knowledge about polyolefin composites and blends is explained, before applications aspects in different industry sectors are discussed. The spectrum comprises a wide range of applications and industry sectors, such as the packaging and food industry, the textile industry, automotive and buildings, and even biomedical applications. Topics, which are addressed in the various chapters, comprise synthesis and processing of the materials; their classification; mechanical, physical and technical requirements and properties; their characterization; and many more. In the end of the book, even the disposal, degradation and recycling of polyolefins are addressed, and light is shed on their commercial significance and economic value. In this way, the book follows the entire 'lifetime' of polyolefin compounds and materials: from their synthesis and processing, over applications, to the recycling and reuse of disposed or degraded polyolefin substrates.
Download or read book A Study of the Miscibility of Crystalline Polyolefins written by N. K. Datta and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polyolefin Miscibility written by Justyna Ewa Wolak and published by . This book was released on 2005 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: enthalpy, entropy, blends, polyolefins.
Download or read book Functional Polymer Blends written by Vikas Mittal and published by CRC Press. This book was released on 2016-04-19 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: With their broad range of properties, polymer blends are widely used in adhesion, colloidal stability, the design of composite and biocompatible materials, and other areas. As the science and technology of polymer blends advances, an increasing number of polymer blend systems and applications continue to be developed. Functional Polymer Blends: Syn
