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Author : Eugene Canlas Aquino
Publisher :
ISBN 13 :
Total Pages : 166 pages
Book Rating : 4.:/5 (259 download)
Download or read book The Effects of the Exposure of Atomic Oxygen on Polymeric Material written by Eugene Canlas Aquino and published by . This book was released on 1991 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ann Fite Whitaker
Publisher :
ISBN 13 :
Total Pages : 145 pages
Book Rating : 4.:/5 (285 download)
Download or read book RF Oxygen Plasma Effects on Polymeric Materials written by Ann Fite Whitaker and published by . This book was released on 1989 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nineteen polymeric materials were exposed to an RF thermal atomic oxygen environment at fluxes of 10(22) atoms/m(2)-sec. Bulk material temperatures were maintained at 10, 45 and 75C during exposure. Mass loss rate which was charateristic of the type of polymer was proportional to exposure area and linear in time for most polymers except for Mylar which produced a shielding high temperature ash.
Download or read book Evaluation of the Effects of Atomic Oxygen on Polymeric Materials written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Adm Nasa
Publisher : Independently Published
ISBN 13 : 9781724011312
Total Pages : 30 pages
Book Rating : 4.0/5 (113 download)
Download or read book Flight Validation of Atomic Oxygen Resistant Resistant Polymers written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-25 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of its high reactivity, atomic oxygen causes surface erosion on polymeric materials. although the reaction efficiency depends on the chemical structure of the polymer. We have found an organotin compound, bis(triphenyltin) oxide (BTO), which has an unusually high solubility in solutions of a number of commercial high performance polymers. Films of these polymers containing BTO showed a substantial reduction in erosion by atomic oxygen when compared with films of the pure material. Analysis has shown that in the presence of atomic oxygen, erosion of the exposed surfaces of the BTO-containing films leaves a residual protective tin oxide coating . Since the additive is uniformly distributed throughout the polymeric material, any break or puncture in the protective coating is "healed" by the material below. Samples were exposed to the environment of the low earth orbit (LEO) on two Space Shuttle flights, STS-46, in June of 1992, and STS-51 in September of 1993. The analysis of these samples has been reported previously. For both flights, the samples were small (1.3 cm and 1.9 cm respectively) thus limiting the scope of analysis. In the research under this cooperative agreement, films of a polyetherimide, were exposed to the LEO environment on Space Shuttle flight STS-85 in August of 1997 as part of the Evaluation of Space Environment and Effects on Materials (ESEM) experiment. The polyetherimide chosen is available commercially as Ultem, registered to the General Electric Company. Films of pure Ultem, Ultem with 10% BTO by mass, and Ultem with 20% BTO by mass were exposed in the ram direction for 40 hours during STS-85. Ultem has a Tg of 215 deg C and is soluble in common chlorinated solvents. Granules of the polymer were dried at 120 deg C, but otherwise were used as received. Films were cast on a glass plate from a solution of the polymer in a 60/40 (w/w) mixture of chloroform and 1,1,2,2-tetrachloroethane. The plate was placed in a dust-free box for
Author :
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (317 download)
Download or read book Atomic Oxygen Textured Polymers written by and published by . This book was released on 1995 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Rachel R. Kamenetzky
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Effects of Atomic Oxygen on Polymeric Materials Flown on EOIM-3 written by Rachel R. Kamenetzky and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Rainer A. Dressler
Publisher : World Scientific
ISBN 13 : 9789812811882
Total Pages : 644 pages
Book Rating : 4.8/5 (118 download)
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 644 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. Sample Chapter(s). Chapter 1.1: Introduction (203 KB). Chapter 1.2: Chemistry at High Temperatures and Pressures (99 KB). Chapter 1.3: High Temperature Chemistry in the Atmosphere (82 KB). Chapter 1.4: Low Temperature Chemistry (90 KB). Chapter 1.5: Conclusions (131 KB). Contents: Exploring Chemistry in Extreme Environments: A Driving Force for Innovation (M R Berman); Chemistry Under Extreme Conditions: Cluster Impact Activation (T Raz & R D Levine); Nonequilibrium Chemistry Modeling in Rarefied Hypersonic Flows (I D Boyd); Chemical Dynamics in Chemical Laser Media (M C Heaven); From Elementary Reactions to Complex Combustion Systems (C Schulz et al.); The Gas-Phase Chemical Dynamics Associated with Meteors (R A Dressler & E Murad); Dynamics of Hypervelocity Gas/Surface Collisions (D C Jacobs); Surface Chemistry in the Jovian Magnetosphere Radiation Environment (R E Johnson); Dynamics of Atomic Oxygen Induced Polymer Degradation in Low Earth Orbit (T K Minton & D J Garton); Atomic-Level Properties of Thermal Barrier Coatings: Characterization of MetalOCoCeramic Interface (A Christensen et al.); Molecular Dynamics Simulations of Detonations (C T White et al.). Readership: Scientists engaged in cross-disciplinary work and chemists studying multidisciplinary problems."
Author : Leonardus Johannes Kok
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (224 download)
Download or read book Effects of Atomic Oxygen on Polymeric Based Materials written by Leonardus Johannes Kok and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Roderick Clarence Tennyson
Publisher :
ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (977 download)
Download or read book Atomic oxygen effects on polymer-based materials written by Roderick Clarence Tennyson and published by . This book was released on 1991 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : P. W. Knopf
Publisher :
ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (976 download)
Download or read book Correlation of Laboratory and Flight Data for the Effects of Atomic Oxygen on Polymeric Materials written by P. W. Knopf and published by . This book was released on 1985 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781721295210
Total Pages : 32 pages
Book Rating : 4.2/5 (952 download)
Download or read book Atomic Oxygen Protection of Materials in Low Earth Orbit written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-19 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spacecraft polymeric materials as well as polymer-matrix carbon-fiber composites can be significantly eroded as a result of exposure to atomic oxygen in low Earth orbit (LEO). Several new materials now exist, as well as modifications to conventionally used materials, that provide much more resistance to atomic oxygen attack than conventional hydrocarbon polymers. Protective coatings have also been developed which are resistant to atomic oxygen attack and provide protection of underlying materials. However, in actual spacecraft applications, the configuration, choice of materials, surface characteristics and functional requirements of quasi-durable materials or protective coatings can have great impact on the resulting performance and durability. Atomic oxygen degradation phenomena occurring on past and existing spacecraft will be presented. Issues and considerations involved in providing atomic oxygen protection for materials used on spacecraft in low Earth orbit will be addressed. Analysis of in-space results to determine the causes of successes and failures of atomic oxygen protective coatings is presented. Banks, Bruce A. and Demko, Rikako Glenn Research Center NASA/TM-2002-211360, E-13180, NAS 1.15:211360
Author : Sharon K. Rutledge
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (317 download)
Download or read book Atomic Oxygen Texturing of Polymers and Carbons written by Sharon K. Rutledge and published by . This book was released on 1997 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781721575923
Total Pages : 26 pages
Book Rating : 4.5/5 (759 download)
Download or read book Atomic Oxygen Effects on Spacecraft Materials written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-20 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low Earth orbital (LEO) atomic oxygen cannot only erode the external surfaces of polymers on spacecraft, but can cause degradation of surfaces internal to components on the spacecraft where openings to the space environment exist. Although atomic oxygen attack on internal or interior surfaces may not have direct exposure to the LEO atomic oxygen flux, scattered impingement can have can have serious degradation effects where sensitive interior surfaces are present. The effects of atomic oxygen erosion of polymers interior to an aperture on a spacecraft is simulated using Monte Carlo computational techniques. A 2-dimensional model is used to provide quantitative indications of the attenuation of atomic oxygen flux as a function of distance into a parallel walled cavity. The degree of erosion relative is compared between the various interior locations and the external surface of an LEO spacecraft. Banks, Bruce A. and Miller, Sharon K. R. and deGroh, Kim K. and Demko, Rikako Glenn Research Center NASA/TM-2003-212484, NAS 1.15:212484, E-14026
Author : Neil Ivan Rock
Publisher :
ISBN 13 :
Total Pages : 440 pages
Book Rating : 4.:/5 (319 download)
Download or read book The Effects of Atomic-oxygen-rich Environments on the Physical and Mechanical Properties of Selected Polymers written by Neil Ivan Rock and published by . This book was released on 1992 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joyce A. Dever
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (317 download)
Download or read book Low Earth Orbital Atomic Oxygen and Ultraviolet Radiation Effects on Polymers written by Joyce A. Dever and published by . This book was released on 1991 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : A. Charlesby
Publisher : Elsevier
ISBN 13 : 1483181308
Total Pages : 579 pages
Book Rating : 4.4/5 (831 download)
Download or read book Atomic Radiation and Polymers written by A. Charlesby and published by Elsevier. This book was released on 2016-06-06 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atomic Radiation and Polymers examines the effects of radiation on polymer materials. The title deals with chemical changes that took place when polymers are exposed to radiation, and how these changes affect the physical properties of the polymers. The text first covers the interaction of radiation and matter, along with radiation sources and dosimetry. Next, the selection deals with the general properties of long chain polymers. The text also details the organic molecules and irradiated polymers. Chapters 22 to 24 tackle the radiation-induced changes in nuclear chain reaction, while Chapter 25 discusses the irradiation of polymers in solution where both direct and indirect effects occur. The next series of chapters details the theoretical aspects of reactions between the initial acts of ionization or excitation. The last two chapters cover the conductivity change at low radiation intensities, along with the data on radiation damage at very high intensities. The book will be of great interest to researchers and practitioners from the field of nuclear science and polymer technology.
Author : D. Dooling
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.:/5 (317 download)
Download or read book Material Selection Guidelines to Limit Atomic Oxygen Effects on Spacecraft Surfaces written by D. Dooling and published by . This book was released on 1999 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
