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Real Time X Ray Scattering Study Of Processing Of Thermoplastic Polymers Effects Of Stress
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Book Synopsis Real-Time X-Ray Scattering Study of Processing of Thermoplastic Polymers: Effects of Stress by :
Download or read book Real-Time X-Ray Scattering Study of Processing of Thermoplastic Polymers: Effects of Stress written by and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the course of this research program we have contributed significantly to the understanding of structure/processing relationships in thermoplastic polymers crystallized from the melt. We concentrated efforts in metallocene- synthesized polyolefins, viz., polypropylene and polyethylene. Real-time wide and small angle X-ray scattering were performed to study the development of different crystallographic phases in PP and PE. Multiple crystallographic forms crystallize in PP, including the orthorhombic gamma and monoclinic alpha phases. Kinetics of crystallization were measured for each phase. We demonstrated that gamma crystallizes at higher temperature than alpha, but melts at lower temperature. Gamma does not convert into alpha upon heating. We showed that nucleation and growth is the mechanism of crystal formation (not spinodal decomposition, as suggested by others) Stress was incorporated into a study of effects of zone-drawing on the structure of PE. Structure was studied using molecular retraction, X-ray scattering and thermal analysis as functions of drawing stress and temperature.
Book Synopsis Real-Time X-Ray Scattering Study of Processing of Eight Performance Thermoplastics by :
Download or read book Real-Time X-Ray Scattering Study of Processing of Eight Performance Thermoplastics written by and published by . This book was released on 1994 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the research was to use real time X-ray scattering: (1) to assist in development of a model for the shrinkage of thermoplastic polymers during processing, and (2) to study the kinetics of crystal structure development. The principle tasks involved real-time X-ray scattering experiments. The secondary tasks involved characterization studies of the materials. We are using real time X ray scattering to study the shrinkage of crystallizable thermoplastic polymers during heat treatment. Most processing models in use today do not use data collected in situ. The matrix shrinkage is determined in real time, directly from x ray scattering. The evolution of cell structure that develops during crystallization can be detected by small angle and wide angle real time x ray scattering.
Download or read book Research in Progress written by and published by . This book was released on 1991 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 652 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.
Book Synopsis Small-angle X-ray Scattering Study of Crazing in Bulk Thermoplastic Polymers by :
Download or read book Small-angle X-ray Scattering Study of Crazing in Bulk Thermoplastic Polymers written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Shape Memory Polymers by : Jinlian Hu
Download or read book Advances in Shape Memory Polymers written by Jinlian Hu and published by Elsevier. This book was released on 2013-04-16 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shape memory materials are immensely useful because of their capability to recover their original shapes upon exposure to an external stimulus such as heat, moisture, light or a magnetic field. This book reviews key recent research in shape memory polymers, their properties and applications. Topics include the relationship between morphological structures and shape memory properties; high performance Tg and Tm type shape memory polymers; structures of shape memory polymers with supramolecular switches; and the thermally-active and moisture-active shape memory effect of supermolecular shape memory polymers. Advances in shape memory polymers is an essential reference for polymer and textile material students, scientists, designers, engineers and manufacturers. It is also an invaluable guide for professionals in the biomedical, electronics and engineering industries. Reviews key recent research in shape-memory polymers, their properties and applications Opening chapters address the relationship between morphological structures and shape memory properties and high performance Tg and Tm type shape memory polymers Chapters cover thermally-active and moisture-active shape memory effect of supermolecular shape memory polymers, among other topics
Download or read book Advanced Polymers Abstracts written by and published by . This book was released on 1996 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis X-Ray Scattering of Soft Matter by : Norbert Stribeck
Download or read book X-Ray Scattering of Soft Matter written by Norbert Stribeck and published by Springer. This book was released on 2010-11-30 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual is a useful ready-reference guide to the analytical power of modern X-ray scattering in the field of soft matter. The author describes simple tools that can elucidate the mechanisms of structure evolution in the studied materials, and follows this up with a step-by-step guide to more advanced methods. Data analysis based on clear, unequivocal results is rendered simple and straightforward – with a stress on careful planning of experiments and adequate recording of all required data.
Book Synopsis Acrylonitrile-butadiene-styrene Polymers by : M. E. Adams
Download or read book Acrylonitrile-butadiene-styrene Polymers written by M. E. Adams and published by iSmithers Rapra Publishing. This book was released on 1993 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: In their review, the authors summarise the state of the art in ABS polymers with major sections on synthesis, characterisation, mechanical properties and stabilisation. There are also sections on the most important speciality grades and a summary of the important commercial blends containing ABS as a component. An additional indexed section containing several hundred abstracts from the Rapra Polymer Library database provides useful references for further reading.
Download or read book Engineered Materials Abstracts written by and published by . This book was released on 1995 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1996 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polyurethane Elastomers by : Cristina Prisacariu
Download or read book Polyurethane Elastomers written by Cristina Prisacariu and published by Springer Science & Business Media. This book was released on 2011-07-03 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive account of the physical / mechanical behaviour of polyurethanes (PU ́s) elastomers, films and blends of variable crystallinity. Aspects covered include the elasticity and inelasticity of amorphous to crystalline PUs, in relation to their sensitivity to chemical and physical structure. A study is made of how aspects of the constitutive responses of PUs vary with composition: the polyaddition procedure, the hard segment, soft segment and chain extender (diols and diamines) are varied systematically in a large number of systems of model and novel crosslinked andthermoplastic PUs. Results will be related to: microstructural changes, on the basis of evidence from x-ray scattering (SAXS and WAXS), and also dynamic mechanical analyses (DMA), differential scanning calorimetry (DSC) and IR dichroism. Inelastic effects will be investigated also by including quantitative correlations between the magnitude of the Mullins effect and the fractional energy dissipation by hysteresis under cyclic straining, giving common relations approached by all the materials studied. A major structural feature explored is the relationship between the nature of the hard segment (crystallising or not) and that of the soft segments. Crystallinity has been sometimes observed in the commercial PUs hard phase but this is usually limited to only a few percent for most hard segment structures when solidified from the melt. One particular diisocyanate, 4,4’-dibenzyl diisocyanate (DBDI) that, in the presence of suitable chain extenders ( diols or diamines), gives rise to significant degrees of crystallinity [i-iii] and this is included in the present work. Understanding the reaction pathways involved, in resolving the subtle morphological evolution at the nanometre level, and capturing mathematically the complex, large-deformation nonlinear viscoelastic mechanical behaviour are assumed to bring new important insights in the world basic research in polyurethanes and towards applied industrial research in this area.
Book Synopsis In-situ Small-Angle X-ray Scattering Investigation of Transient Nanostructure of Multi-phase Polymer Materials Under Mechanical Deformation by : Ahmad Zeinolebadi
Download or read book In-situ Small-Angle X-ray Scattering Investigation of Transient Nanostructure of Multi-phase Polymer Materials Under Mechanical Deformation written by Ahmad Zeinolebadi and published by Springer Science & Business Media. This book was released on 2013-01-30 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results in this dissertation set the ground to answer a fundamental question in data-driven polymer material science: "Why don't prepared composites show less fatigue than the pure plastics?" A simultaneous analysis of mechanical testing and small angle X-Ray scattering from the DESY source in Hamburg has been applied to approach this question, which is also central to the European research project "Nanotough", and the results are clearly presented in this book. The evolution of the materials structure is visualized and quantitatively analyzed from exhaustive sequences of scattering images. Three different classes of polymer composites are presented as typical and illustrative examples. The obtained results illustrate that the interactions of their components can cause unpredictable structural effects, ultimaltely leading to a weakening of the material, where a reinforcement was expected.
Book Synopsis Rubber Nanocomposites by : Sabu Thomas
Download or read book Rubber Nanocomposites written by Sabu Thomas and published by John Wiley & Sons. This book was released on 2010-04-09 with total page 729 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rubber Nanocomposites: Preparation, Properties and Applications focuses on the preparation, characterization and properties of natural and synthetic rubber nanocomposites. The book carefully debates the preparation of unmodified and modified nanofillers, various manufacturing techniques of rubber nanocomposites, structure, morphology and properties of nanocomposites. The text reviews the processing; characterization and properties of 0-, 1D and 2D nanofiller reinforced rubber nanocomposites. It examines the polymer/filler interaction, i.e., the compatibility between matrix and filler using unmodified and modified nanofillers. The book also examines the applications of rubber nanocomposites in various engineering fields, which include tyre engineering. The book also examines the current state of the art, challenges and applications in the field of rubber nanocomposites. The handpicked selection of topics and expert contributions make this survey of rubber nanocomposites an outstanding resource for anyone involved in the field of polymer materials design. A handy "one stop" reference resource for important research accomplishments in the area of rubber nanocomposites. Covers the various aspects of preparation, characterization, morphology, properties and applications of rubber nanocomposites. Summarizes many of the recent technical research accomplishments in the area of nanocomposites, in a comprehensive manner It covers an up to date record on the major findings and observations in the field
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1998 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1993 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
