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Real Time X Ray Scattering Study Of Processing Of Eight Performance Thermoplastics
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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.
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 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 31 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 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 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Microgravity Studies of Organic and Polymeric Materials by : D. O. Frazier
Download or read book Microgravity Studies of Organic and Polymeric Materials written by D. O. Frazier and published by . This book was released on 1994 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Materials and Processes in Transportation by : Dirk Lehmhus
Download or read book Structural Materials and Processes in Transportation written by Dirk Lehmhus and published by John Wiley & Sons. This book was released on 2013-08-07 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lightness, efficiency, durability and economic as well as ecological viability are key attributes required from materials today. In the transport industry, the performance needs are felt exceptionally strongly. This handbook and ready reference covers the use of structural materials throughout this industry, particularly for the road, air and rail sectors. A strong focus is placed on the latest developments in materials engineering. The authors present new insights and trends, providing firsthand information from the perspective of universities, Fraunhofer and independent research institutes, aerospace and automotive companies and suppliers. Arranged into parts to aid the readers in finding the information relevant to their needs: * Metals * Polymers * Composites * Cellular Materials * Modeling and Simulation * Higher Level Trends
Book Synopsis Technical Reports Awareness Circular : TRAC. by :
Download or read book Technical Reports Awareness Circular : TRAC. written by and published by . This book was released on 1989-08 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book Engineered Materials Abstracts written by and published by . This book was released on 1995-04 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1971 with total page 1434 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 Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1989 with total page 1188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Textile Technology Digest written by and published by . This book was released on 2000 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2566 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :American Chemical Society. Committee on Professional Training Publisher : ISBN 13 :9780841227231 Total Pages :1700 pages Book Rating :4.2/5 (272 download)
Book Synopsis ACS Directory of Graduate Research 1993 by : American Chemical Society. Committee on Professional Training
Download or read book ACS Directory of Graduate Research 1993 written by American Chemical Society. Committee on Professional Training and published by . This book was released on 1993 with total page 1700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Publications of the National Institute of Standards and Technology ... Catalog by : National Institute of Standards and Technology (U.S.)
Download or read book Publications of the National Institute of Standards and Technology ... Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1994 with total page 1162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Committee on New Sensor Technologies: Materials and Applications Publisher :National Academies Press ISBN 13 :0309587433 Total Pages :146 pages Book Rating :4.3/5 (95 download)
Book Synopsis Expanding the Vision of Sensor Materials by : Committee on New Sensor Technologies: Materials and Applications
Download or read book Expanding the Vision of Sensor Materials written by Committee on New Sensor Technologies: Materials and Applications and published by National Academies Press. This book was released on 1995-07-06 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in materials science and engineering have paved the way for the development of new and more capable sensors. Drawing upon case studies from manufacturing and structural monitoring and involving chemical and long wave-length infrared sensors, this book suggests an approach that frames the relevant technical issues in such a way as to expedite the consideration of new and novel sensor materials. It enables a multidisciplinary approach for identifying opportunities and making realistic assessments of technical risk and could be used to guide relevant research and development in sensor technologies.
