Polymer Research In Microgravity
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Polymer Research In Microgravity
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Author : James Patton Downey
language : en
Publisher:
Release Date : 2001
Polymer Research In Microgravity written by James Patton Downey and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Science categories.
Sixteen papers examine how gravity can affect polymerizations and polymer processing and how weightlessness or "microgravity" is achieved. The volume reviews the current research from sounding rocket and orbital investigations, parabolic flight investigations, and ground-based research. Also covered are inorganic to biologically produced polymers, including free-radical polymerization, polymer-dispersed luquid crystals and foams.
Microgravity Polymers
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Author :
language : en
Publisher:
Release Date : 1986
Microgravity Polymers written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
Polymers In Space Research
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Author : Symposium on Polymers in Space Research Staff
language : en
Publisher:
Release Date :
Polymers In Space Research written by Symposium on Polymers in Space Research Staff and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Polymers In Space Research
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Author : Charles L. Segal
language : en
Publisher:
Release Date : 1970
Polymers In Space Research written by Charles L. Segal and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Polymers and polymerization categories.
Combustion Of A Polymer Pmma Sphere In Microgravity
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Author : National Aeronautics and Space Adm Nasa
language : en
Publisher: Independently Published
Release Date : 2018-09-19
Combustion Of A Polymer Pmma Sphere In Microgravity written by National Aeronautics and Space Adm Nasa and has been published by Independently Published this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-19 with Science categories.
A series of low gravity, aircraft-based, experiments was conducted to investigate the combustion of supported thermoplastic polymer spheres under varying ambient conditions. The three types of thermoplastic investigated were polymethylmethacrylate (PMMA), polypropylene (PP). and polystyrene (PS). Spheres with diameters ranging from 2 mm to 6.35 mm were tested. The total initial pressure varied from 0.05 MPa to 0. 15 MPa whereas the ambient oxygen concentration varied from 19 % to 30 % (by volume). The ignition system consisted of a pair of retractable energized coils. Two CCD cameras recorded the burning histories of the spheres. The video sequences revealed a number of dynamic events including bubbling and sputtering, as well as soot shell formation and break-up during combustion of the spheres at reduced gravity. The ejection of combusting material from the burning spheres represents a fire hazard that must be considered at reduced gravity. The ejection process was found to be sensitive to polymer type. All average burning rates were measured to increase with initial sphere diameter and oxygen concentration, whereas the initial pressure had little effect. The three thermoplastic types exhibited different burning characteristics. For the same initial conditions, the burning rate of PP was slower than PMMA, whereas the burning rate of PS was comparable to PMMA. The transient diameter of the burning thermoplastic exhibited two distinct periods: an initial period (enduring approximately half of the total burn duration) when the diameter remained approximately constant, and a final period when the square of the diameter linearly decreased with time. A simple homogeneous two-phase model was developed to understand the changing diameter of the burning sphere. Its value is based on a competition between diameter reduction due to mass loss from burning and sputtering, and diameter expansion due to the processes of swelling (density decrease with heating) and bubble growth.
Polymers In Space Research
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Author : Charles L. Segal
language : en
Publisher: Marcel Dekker
Release Date : 1970
Polymers In Space Research written by Charles L. Segal and has been published by Marcel Dekker this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Technology & Engineering categories.
Future Materials Science Research On The International Space Station
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 1997-11-27
Future Materials Science Research On The International Space Station written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-11-27 with Technology & Engineering categories.
Design And Fabrication Of Large Polymer Constructions In Space
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Author : Alexey Kondyurin
language : en
Publisher: Elsevier
Release Date : 2022-09-29
Design And Fabrication Of Large Polymer Constructions In Space written by Alexey Kondyurin and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-09-29 with Technology & Engineering categories.
Design and Fabrication of Large Polymer Constructions in Space is a ground-breaking study of the polymeric materials, advanced chemical processes, and cutting-edge technology required in the construction of large polymer-based structures for space, when all steps in the process are carried out in the space environment, whether in orbit, in deep space, or on the surface of a moon, asteroid, or planet.The book begins by introducing the fundamentals and requirements of large constructions and inflatable structures for space. The next section of the book focuses on the utilization of polymeric materials within the space environment, examining the effects on materials (vacuum, plasma, temperature), the possible approaches to polymerization both in space and in orbit, the preparation and structure of polymer composites, and the methods for testing materials and structures in terms of strength, defects, and aging. Three chapters then cover how these materials and techniques might be applied to specific categories of construction, including larger space habitats, supporting space structures, and ground infrastructure. Finally, the financial aspects, the consequences for human space exploitation, and the possible future developments are discussed.Using materials science to push the boundaries of construction for space exploration and exploitation, this book is a unique resource for academic researchers and advanced students across polymer science, advanced materials, chemical engineering, construction, and space engineering, as well as for researchers, scientists and engineers at space agencies, companies and laboratories, involved in developing materials or technology for use in space. This is also of great interest to anyone interested in the role of materials science in the building of large space stations, spacecraft, planetary bases, large aperture antenna, radiation and thermal shields, and repairmen sets. Describes the role of polymers in the construction of large space habitats, supporting space structures, and ground infrastructure Explains polymerization in the Earth’s orbit and in space, covering material specifications, control of curing, and the effects of interaction with the external environment Presents the possible testing methods, including strength evaluation, defect detection, and aging tests of materials and constructions
Microgravity Science And Applications Program Tasks
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Author : United States. Office of Space Science and Applications
language : en
Publisher:
Release Date : 1988
Microgravity Science And Applications Program Tasks written by United States. Office of Space Science and Applications and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Fluid dynamics (Space environment) categories.
Microgravity Manufacturing Via Fused Deposition
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-08-20
Microgravity Manufacturing Via Fused Deposition written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-08-20 with categories.
Manufacturing polymer hardware during space flight is currently outside the state of the art. A process called fused deposition modeling (FDM) can make this approach a reality by producing net-shaped components of polymer materials directly from a CAE model. FDM is a rapid prototyping process developed by Stratasys, Inc.. which deposits a fine line of semi-molten polymer onto a substrate while moving via computer control to form the cross-sectional shape of the part it is building. The build platen is then lowered and the process is repeated, building a component directly layer by layer. This method enables direct net-shaped production of polymer components directly from a computer file. The layered manufacturing process allows for the manufacture of complex shapes and internal cavities otherwise impossible to machine. This task demonstrated the benefits of the FDM technique to quickly and inexpensively produce replacement components or repair broken hardware in a Space Shuttle or Space Station environment. The intent of the task was to develop and fabricate an FDM system that was lightweight, compact, and required minimum power consumption to fabricate ABS plastic hardware in microgravity. The final product of the shortened task turned out to be a ground-based breadboard device, demonstrating miniaturization capability of the system. Cooper, K. G. and Griffin, M. R. Marshall Space Flight Center NASA/TM-2003-212636, NAS 1.15:212636, M-1083