Author :
Publisher :
ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (742 download)
Book Synopsis Multidisciplinary Oxygen Atom Erosion and Surface Characterization Studies of Polyhedral Oligomeric Silsesquioxane by :
Download or read book Multidisciplinary Oxygen Atom Erosion and Surface Characterization Studies of Polyhedral Oligomeric Silsesquioxane written by and published by . This book was released on 2004 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this research project have been to characterize the degradation of various types of polymers under simulated space (low-earth orbit (LEO)) conditions and to develop polymers for spacecraft coatings which have improved survivability in LEO. Many polymers have been tested including kapton, polyethylene, fluoromers, polyhedral oligomeric silsequioxane (POSS)-containing copolymers and others. The testing was performed in an ultrahigh vacuum system which contained an atomic oxygen (AO) source and a vacuum ultraviolet (vuv) source. In some studies the polymers were also exposed to energetic electrons and ions. The chemical alterations occurring during the degradation was monitored using X-ray photoelectron spectroscopy (XPS). All polymers exhibit large chemical changes. The POSS-containing polymers are particularly interesting for space applications because they form a thin silica layer which protects the underlying polymer from further degradation.