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Interactions Of Hyperthermal Oxygen Atoms With Polymer Surfaces
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Book Synopsis Interactions of Hyperthermal Oxygen Atoms with Polymer Surfaces by :
Download or read book Interactions of Hyperthermal Oxygen Atoms with Polymer Surfaces written by and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: All objectives were met or exceeded, with the exception of the source characterization. We have answered many fundamental questions about the initial reactions with a hydrocarbon surface; related theoretical calculations have been completed and published by another group; waveguide-like structures have been etched; modification of polystyrene surfaces have been performed in plasma and hyperthermal beam environments and the resultant chemistries compared; yeast-cell adhesion studies have been conducted on beam- and plasma-modified surfaces; a detailed study on the effect of ion-implantation on the reactivity of polymer surfaces with atomic oxygen has been completed; activity in the space environment effects community has remained high; and related studies of the interaction of fast fluorine and oxygen atoms with a silicon surface have been completed.
Book Synopsis Molecular Beam Studies of Hyperthermal Atomic Oxygen and Argon Interactions with Polymer Surfaces and Gas-phase Molecules by : Amy Leigh Brunsvold
Download or read book Molecular Beam Studies of Hyperthermal Atomic Oxygen and Argon Interactions with Polymer Surfaces and Gas-phase Molecules written by Amy Leigh Brunsvold and published by . This book was released on 2007 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: O atoms and N2 molecules in the outer atmosphere of the Earth collide with spacecraft surfaces and various gases that are released from space vehicles. The high relative velocity of the collisions promotes high reaction probability and large energy transfers, leading to materials degradation and chemiluminescent reactions, which may interfere with the mission of the vehicle. The work presented in this thesis uses sophisticated molecular beam and surface science techniques to study materials degradation and individual reactive and inelastic collisions in an effort to understand the complex chemistry and physics that are characteristic of space vehicle interactions with Earth's upper atmosphere. A new space-durable polymer, polyhedral oligomeric silsesquioxane polyimide, has been identified. When exposed to atomic oxygen, this polymer forms a protective SiO2 layer on its surface. Beam-surface scattering experiments showed that collision-induced dissociation becomes an important gas-surface process when the translational energy of the incident atom or molecule is greater than 8 eV. Experiments on the dynamics of gas-phase collisions at hyperthermal collision energies found that inelastic collisions may transfer large amounts of energy into internal degrees of freedom. The scattering dynamics of the reactive 16OC product from the 16O( 3P) + C18O → 16OC + 18O reaction were quite unexpected, with 16OC predominantly forward scattered. Experiments on the reactions of O( 3P) with H2O demonstrated the occurrence of a previously unobserved reaction pathway, O(3P) + H2O → HO2 + H, with a barrier determined to be ∼2.6 eV. These studies of hyperthermal processes with molecular beam techniques have enabled us to identify a promising new material and to understand the detailed collision dynamics in model gas-surface and gas-phase systems. In each case, the experiments have revealed new chemical or energy transfer processes that were not considered earlier. These previously unknown processes reveal trends in hyperthermal collisions that will undoubtedly be critical to the planning and design of missions that put space vehicles in contact with the outer reaches of the Earth's atmosphere.
Book Synopsis Atomic Oxygen Interactions with Saturated Hydrocarbon Surfaces by : Donna J. Garton
Download or read book Atomic Oxygen Interactions with Saturated Hydrocarbon Surfaces written by Donna J. Garton and published by . This book was released on 1997 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Chemical Dynamics in Extreme Environments by : Rainer A. Dressler
Download or read book Chemical Dynamics in Extreme Environments written by Rainer A. Dressler and published by World Scientific. This book was released on 2001 with total page 631 pages. Available in PDF, EPUB and Kindle. Book excerpt: As computing power increases, a growing number of macroscopic phenomena are modeled at the molecular level. Consequently, new requirements are generated for the understanding of molecular dynamics in exotic conditions. This book illustrates the importance of detailed chemical dynamics and the role it plays in the phenomenology of a number of extreme environments. Each chapter addresses one or more extreme environments, outlines the associated chemical mechanisms of relevance, and then covers the leading edge science that elucidates the chemical coupling. The chapters exhibit a balance between theory and experiment, gas phase, solid state, and surface dynamics, and geophysical and technical environments.
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 602 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 Protection of Materials and Structures from Space Environment by : J. Kleiman
Download or read book Protection of Materials and Structures from Space Environment written by J. Kleiman and published by Springer Science & Business Media. This book was released on 2006-03-09 with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication presents the proceedings of ICPMSE-6, the sixth international conference on Protection of Materials and Structures from Space Environment, held in Toronto May 1-3, 2002. The ICPMSE series of meetings became an important part of the LEO space community since it was started in 1991. Since then, the meeting has grown steadily, attracting a large number of engineers, researchers, managers, and scientists from industrial companies, scientific institutions and government agencies in Canada, U. S. A. , Asia, and Europe, thus becoming a true international event. This year’s meeting is gaining even stronger importance with the resumption of the ISS and other space projects in LEO, GEO and Deep Space. To reflect on these activities, the topics in the program have been extended to include protection of materials in GEO and Deep Space. The combination of a broad selection of technical and scientific topics addressed by internationally known speakers with the charm of Toronto and the hospitality of the organizers brings participants back year after year. The conference was hosted and organized by Integrity Testing Laboratory Inc. (ITL), and held at the University of Toronto’s Institute for Aerospace Studies (UTIAS). The meeting was sponsored by the Materials and Manufacturing Ontario (MMO) and the CRESTech, two Ontario Centres of Excellence; Air Force Office of Scientific Research (AFOSR/NL); MD Robotics; EMS Technologies; The Integrity Testing Laboratory (ITL); and the UTIAS.
Book Synopsis Polyimides and Other High Temperature Polymers: Synthesis, Characterization and Applications, Volume 3 by : Kash L. Mittal
Download or read book Polyimides and Other High Temperature Polymers: Synthesis, Characterization and Applications, Volume 3 written by Kash L. Mittal and published by CRC Press. This book was released on 2005-04-18 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume chronicles the proceedings of the Third International Symposium on Polyimides and Other High Temperature Polymers: Synthesis, Characterization, and Applications, held in Orlando, December 17-19, 2003.This volume is divided into three parts. Part 1. a Synthesis, Properties and Bulk Characterizationa ; Part 2 a Hybrids and Compositesa
Book Synopsis Space Vehicle Material and Plume Interactions With the Low Earth Orbital Environment by :
Download or read book Space Vehicle Material and Plume Interactions With the Low Earth Orbital Environment written by and published by . This book was released on 2008 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The setup of a UHV apparatus with a hyperthermal 0-atom source was completed, and this apparatus is available as infrastructure for in-situ investigations of surfaces modified by hyperthermal atomic-oxygen. The laser-breakdown, hyperthermal atomic-oxygen source has been dramatically improved by the redesigned molecular beam valve. A quartz crystal microbalance has been used to study the erosion kinetics of a number of P0SS-containing and Al203-coated polyimides during exposure to hyperthermal 0 atoms. Crossed-beams experiments in the PI's lab and corresponding theoretical studies by collaborators have revealed the dynamics of 0(3P) reactions with several small molecules that might be found in rocket exhaust gases. Beam-surface scattering experiments, in which hyperthermal 0 and Ar atoms were directed at fluoropolymer surfaces (with and without the presence of VUV light), found synergistic effects involving 0-atom reactions, VUV light, and collision-induced dissociation that may dominate the mechanism of Teflon degradation in low Earth orbit. The dynamics of hyperthermal Ar scattering from graphite showed the risk of using simple models to interpret hyperthermal gas-surface interactions. The exposure of numerous samples to a beam of hyperthermal oxygen atoms confirmed the 0-atom resistance of several new POSS polymers and deepened our understanding of the erosion mechanisms of polymers. The infrastructure to study hyperthermal interactions has been transitioned to a Center for Laboratory Studies of Rocket Plume Chemistry and to the support of two STTR projects aimed at the development of improved coatings for use in space.
Download or read book Space Station Systems written by and published by . This book was released on 1986 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamic Processes in Solids by : James E. House
Download or read book Dynamic Processes in Solids written by James E. House and published by Elsevier. This book was released on 2023-05-26 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results obtained from kinetic studies on reactions in solids often depend on numerous factors. Therefore, it is important for researchers to understand how both chemical factors related to composition and procedural choices may influence outcomes. Dynamic Processes in Solids provides an authoritative overview of reactions in solids and helps readers interpret the results obtained from kinetic studies. In chapters written by active researchers, the reader will learn about choosing appropriate experimental techniques and their limitations for studying various types of reactions. Beginning with an introduction to numerous aspects of rate processes in solids and experimental techniques, information is provided on rate laws, factors affecting rates, diffusion, and sintering. Subsequent chapters deal with electrical conductivity in dispersed phase polymers, thermochemical reactions for producing solid materials, reactions in coordination compounds, dynamic observations on plastic deformation, light driven phenomena in quantum materials, decomposition of perovskite photovoltaic compounds, and reaction of oxygen radicals with surfaces. This book is a practical introduction to the field for chemists and researchers whose work is directly related to dynamic changes in solids, and additionally for those in related fields whose work would be enhanced by an understanding of these types of rate processes. - Presents useful discussions of the applications of several experimental techniques - Describes approaches for synthesis of solid materials by thermochemical reactions - Presents theoretical interpretation structural dynamics and processes at the molecular level in solids - Provides information on the relationships between performance and rate processes in several types of materials related to electronic behavior
Book Synopsis Large Space Structures & Systems in the Space Station Era by :
Download or read book Large Space Structures & Systems in the Space Station Era written by and published by . This book was released on 1991 with total page 1042 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dual-Use Space Technology Transfer Conference and Exhibition by :
Download or read book Dual-Use Space Technology Transfer Conference and Exhibition written by and published by . This book was released on 1994 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design and Fabrication of Large Polymer Constructions in Space by : Alexey Kondyurin
Download or read book Design and Fabrication of Large Polymer Constructions in Space written by Alexey Kondyurin and published by Elsevier. This book was released on 2022-09-29 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Book Synopsis Protection of Space Materials from the Space Environment by : J. Kleiman
Download or read book Protection of Space Materials from the Space Environment written by J. Kleiman and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication presents the proceedings of ICPMSE-4, the fourth international conference on Protection of Materials and Structures from the Low Earth Orbit Space Environment, held in Toronto April 23-24, 1998. The conference was hosted and organized by Integrity Testing Laboratory Inc. (ITL), and held at the University ofToronto's Institute for Aerospace Studies (UTIAS). Twenty two industrial companies, six universities and fourteen government agencies from Canada, USA, United Kingdom, France, Israel, Russia, Ukraine and the Netherlands were represented by over 75 participants indicating increasing international co-operation in this critical arena of protection of materials in space. Twenty-seven speakers, world experts in their fields, delivered talks on a wide variety of topics on various aspects of material protection in space. Representatives from the Canadian, American, European and Israeli space agencies as well as from leading space research laboratories ofmajor aerospace industries gathered at UTIAS to discuss the latest developments in the field of material and structure protection from the harsh space environment.
Book Synopsis Polyimides and Other High-temperature Polymers by : K. L. Mittal
Download or read book Polyimides and Other High-temperature Polymers written by K. L. Mittal and published by BRILL. This book was released on 2009-04-24 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: The topics covered in this proceedings volume include: Synthesis, characterization and processing (including some novel approaches) of a variety of polyimides and other high temperature polymers; structure-property relationships; segmental dynamics in polyimide materials; photoalignable polyimides; photoconductivity and photosensitivity of polyimides; ultrafiltration membranes from polyetherimide; polymer materials for nonlinear optical applications; alignment of SWNTs in rigid-rod polymer compositions; surface modification of polyimide; adhesion of Cu to polyimide surfaces; and polyimide erosion in a low Earth orbit space environment.
Book Synopsis Protection of Materials and Structures from the Low Earth Orbit Space Environment by : J. Kleiman
Download or read book Protection of Materials and Structures from the Low Earth Orbit Space Environment written by J. Kleiman and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication presents the proceedings of ICPMSE-3, the third international conference on Protection of Materials and Structures from the Low Earth Orbit Space Environment, held in Toronto April 25-26, 1996. The conference was hosted and organized by Integrity Testing Laboratory Inc, (ITL), and held at the University of Toronto's Institute for Aerospace Studies (UTIAS), where ITL is located. Twenty industrial companies, seven wliversities and eight government agencies from Canada, USA, United Kingdom, France, Israel, Russia, Ukraine and the Netherlands were represented by over 55 participants indicating increasing international co-operation in this critical arena of protection of materials in space. Twenty-five speakers, world experts in their fields, delivered talks on a wide variety of topics on various aspects of material protection in space, Representatives from the Canadian, American, European and Israeli space agencies as well as from leading space research laboratories of major aerospace industries gathered at UTIAS to discuss the latest developments in the field of material and structure protection from the harsh space environment, These proceedings are organized into four sections: a) AONOV and Radiation Effects on Materials and Structures in the Leo Space Environment; b) Interaction of Matter with the LEO Environment; c) Large Scale Coating Process Developments for Protection in LEO; d) Synthesis and Modification of Materials and Surfaces for Protection in LEO, This is the third in our on-going series of bi-annual international space materials conferences wllich began in 1992 in Toronto. Jacob Kleiman, Integrity Testing Laboratory Inc.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2007 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
