Download or read book Polymer Blend De mixing and Morphology Development During Tube Flow written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polymer Blend De mixing and Morphology Development During Tube Flow microform written by Askar Karami and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1999 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polymer Blend De mixing and Morphology Development During Tube Flow written by Askar Karami and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work is an investigation of morphology and de-mixing of polymer blends during melt flow through a tube. Morphology is the relative size, shape and location of each distinguishable phase present in a polymer blend. De-mixing is the shear-induced migration of different types of polymers away from each other during the flow. Being able to tailor de-mixing during extrusion can potentially result in a new family of plastics waste recycling processes with mixed waste entering an extruder and separate streams of different polymer types leaving it. Also, control of morphology development can lead to the formation of layered structures without the need for two or more extruders and co-extrusion. These ideas formed the basis for a U.S. Patent. However, obtaining an understanding of the phenomena is critical to improving separations to a practical level. This thesis is directed at elucidating morphology development and de-mixing of polymer blends in the most simple process design: melt flow through a tube. The work had four objectives. The first was to design a process that would enable elucidation of both morphology and de-mixing along the tube. This was done by attaching a long segmented tube to a static mixer which in turn was attached to the end of a single screw extruder. At the conclusion of a run, the tube was quenched and disassembled to provide the needed samples. The second objective was to develop analytical methods to measure polymer composition in the samples. A mid-infrared spectrometer technique and a method based on the use of a differential scanning calorimeter were developed. The third objective was to use the above accomplishments to elucidate morphology development and polymer migration. Shear-induced migration was quantitatively shown in various polyethylene-polypropylene, polypropylene-nylon6 and polyethylene-nylon6 blends. The theoretical rate of viscous energy dissipation per unit length of the tube was used to show that the observed shear-induced migration was in accordance with the principle of energy minimization. The ratio of the viscosity of the dispersed phased to that of the continuous phase greatly influenced the morphology of polypropylene-nylon6 and polyethylene-nylon6 blends: a droplet-dispersed phase structure occurred at a high viscosity ratio whereas a multi-layer structure resulted at viscosity ratios near unity. Shear-induced deformation and coalescence contributed to formation of the multi-layer structure. Finally, the fourth objective was to investigate the effect of morphology development on viscosity measurement by capillary rheometry. The extruder-tube process was used as the rheometer. Morphology had a large impact on the value of the measured viscosity and viscosity-composition data were shown to be not readily fit by two mixing rule models: Lees' model and a sheath-core model. Greatly improved results were obtained by introducing a "shear-induced interlayer slip factor" into the sheath-core model.

Download or read book Morphology Development During Polymer Blending written by Uttandaraman Sundararaj and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 1994 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Fibrous Materials 2 Volumes written by Jinlian Hu and published by John Wiley & Sons. This book was released on 2020-06-22 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt: Edited by a leading expert in the field with contributions from experienced researchers in fibers and textiles, this handbook reviews the current state of fibrous materials and provides a broad overview of their use in research and development. Volume One focuses on the classes of fibers, their production and characterization, while the second volume concentrates on their applications, including emerging ones in the areas of energy, environmental science and healthcare. Unparalleled knowledge of high relevance to academia and industry.

Download or read book Morphology Development of Immiscible Polymer Blends in Complex Flow Fields written by Brian Edward Priore and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Phase Behavior and Morphology of Polymer Blend Under High Flow Rate written by Piyawit Koombhongse and published by LAP Lambert Academic Publishing. This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of flow is of industrial relevance in melt extrusion and injection molding where temperature gradients and high deformation rates are encountered. This demands a better understanding of the flow dependence of the phase behavior in polymer blends since the morphology and properties of the finished product are influenced to great extent by the details of dynamics of the flowing melt. Experimentally both shear induced mixing and shear induced demixing phenomena have been observed under a variety of operational conditions. The primary objective of this book is to explain the phase behavior under industrially realistic deformation rates using a partially miscible SAN/PMMA blend as an example and to clarify the effect of shear flow on morphology of injection-molded sample. The reader will briefly learn the basic Thermodynamics of phase separation, Thermodynamics of polymer blends, and how to detect polymer miscibility by using Raman Spectroscopy and other techniques. The effect of shear flow on phase behavior of polymer blend is demonstrated theoretically and experimentally.

Download or read book Encyclopedia of Polymer Blends Volume 2 written by Avraam I. Isayev and published by John Wiley & Sons. This book was released on 2016-09-12 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete and timely overview of the topic, this volume imparts knowledge of fundamental principles and their applications for academicians, scientists and researchers, while informing engineers, industrialists and entrepreneurs of the current state of the technology and its utilization. Each article is uniformly structured for easy navigation, containing the latest research & development and its basic principles and applications, examples of case studies, laboratory and pilot plant experiments, as well as due reference to the published and patented literature.

Download or read book Maro Polymer Notes written by and published by . This book was released on 2001 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Morphology Development and Compatibilization in Immiscible Polymer Blend Systems written by Parag G. Ghodgaonkar and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Morphology Development and Compatibilization in Immiscible Polymer Blend Systems 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 Dissertation Abstracts International written by and published by . This book was released on 2003 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Food Mixing written by P. J. Cullen and published by John Wiley & Sons. This book was released on 2009-07-21 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mixing of liquids, solids and gases is one of the most commonunit operations in the food industry. Mixing increases thehomogeneity of a system by reducing non-uniformity or gradients incomposition, properties or temperature. Secondary objectives ofmixing include control of rates of heat and mass transfer,reactions and structural changes. In food processing applications,additional mixing challenges include sanitary design, complexrheology, desire for continuous processing and the effects ofmixing on final product texture and sensory profiles. Mixing ensures delivery of a product with constant properties. Forexample, consumers expect all containers of soups, breakfastcereals, fruit mixes, etc to contain the same amount of eachingredient. If mixing fails to achieve the requiredproduct yield, quality, organoleptic or functional attributes,production costs may increase significantly. This volume brings together essential information on theprinciples and applications of mixing within food processing. Whilethere are a number of creditable references covering generalmixing, such publications tend to be aimed at the chemical industryand so topics specific to food applications are often neglected.Chapters address the underlying principles of mixing, equipmentdesign, novel monitoring techniques and the numerical techniquesavailable to advance the scientific understanding of food mixing.Food mixing applications are described in detail. The book will be useful for engineers and scientists who need tospecify and select mixing equipment for specific processingapplications and will assist with the identification and solving ofthe wide range of mixing problems that occur in the food,pharmaceutical and bioprocessing industries. It will also be ofinterest to those who teach, study and research food science andfood engineering.

Download or read book Micro and Nanostructured Multiphase Polymer Blend Systems written by Charef Harrats and published by CRC Press. This book was released on 2019-12-02 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro- and Nanostructured Multiphase Polymer Blend Systems: Phase Morphology and Interfaces focuses on the formation of phase morphology in polymer blends and copolymers and considers various types of blends including thermosets, thermoplastics, thermoplastic vulcanizates, and structured copolymers. The book carefully debates the processing, rheology, and crystallization aspects of the phase morphology of polymer blends. The text surveys theory, characterization, processing, and experimental aspects of phase morphology development and design of polymer blends. It examines the adhesion of polymer-polymer interfaces in immiscible polymer blends and the different ways by which nanostructures may be generated in thermosetting polymers. The book analyzes the polymerization process and the dynamic vulcanization of multicomponent polymer blends and the crystallization behavior occurring in blends with a confined morphology. It also discusses the structure-rheology relationship in compatibilized blends, the effects of elasticity on the structure development, and the rheological response in concentrated blends. Micro- and Nanostructured Multiphase Polymer Blend Systems examines the current state of the art, challenges, and future prospects in the field of polymer blends. The handpicked selection of topics and expert contributors makes this survey of phase morphology in polymer blends an outstanding resource for anyone involved in the field of polymer materials design.

Download or read book Development of Polymer Blend Morphology During Compounding in a Twin screw Extruder written by L. A. Utracki and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Morphology Development During the Phase Inversion of Immiscible Polymer Blends written by Nicole Danielle Bautista Lazo and published by . This book was released on 2000 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: