Download or read book Zr Containing 4 4 ODA PMDA Polyimide Composites Parts 1 And 2 written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-15 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research is to improve the atomic oxygen resistance of Kapton(TM), a polyimide (PI) made from pyromellitic acid dianhydride (PMDA) and 4,4'-oxydianiline (ODA), while retaining or enhancing the desirable properties of the pure polymer. Toward this end, zirconium-containing complexes and polymers were used to make composites and blends. Tetra(acetylacetonato)zirconium(IV), Zr(acac)4, which is commercially available, was identified as the best zirconium-containing complex for enhancing the atomic oxygen resistance of polyimide composites of the 10 complexes screened. Films prepared from the commercially available polyamic acid (PAA) of PMDA-ODA (DuPont) have good uniformity, flexibility, and tensile strength. A 24-layer 10% (mol) Zr(acac)4/PI composite film showed significant improvement (ca. 20 fold) of atomic oxygen resistance over the pure polyimide. However, 10% (mol) Zr(acac)4 represents an upper concentration limit, above which films undergo cracking upon thermal imidization. In order to increase the Zr complex concentration in PMDA-ODA PI films, while retaining good film properties, [Zr(adsp)2-PMDA]n coordination polymer [bis(4-amino-N,N'-disalicylidene- 1,2-phenylenediamino)zirconium(IV)-pyromellitic dianhydride] and [Zr(adsp)2-PMDA-ODA-PMDA]n terpolymer were synthesized and blended with commercial PAA, respectively. Several techniques were used to characterize the films made from the polymer containing Zr(acac)4. Plasma studies of films having 2% (mol) incremental concentrations of Zr in the Kapton up to 10% (mol) show that the overall rate of erosion is reduced about 75 percent. Illingsworth, M. L. and Betancourt, J. A. and Chen, Y. and Terschak, J. A. and Banks, B. A. and Rutledge, S. K. and Cales, M. and He, L. Glenn Research Center NAG3-1008; RTOP 251-30-1E
Download or read book Zr Containing 4 4 ODA PMDA Polyimide Composites written by and published by . This book was released on 2001 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ZR CONTAINING 4 4 ODA PMDA POLYMIDE COMPOSITES NASA TM 2001 211099 DEC 6 2001 written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 2003 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Environmental Degradation of Materials written by Myer Kutz and published by William Andrew. This book was released on 2012-12-31 with total page 934 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nothing stays the same for ever. The environmental degradation and corrosion of materials is inevitable and affects most aspects of life. In industrial settings, this inescapable fact has very significant financial, safety and environmental implications. The Handbook of Environmental Degradation of Materials explains how to measure, analyse, and control environmental degradation for a wide range of industrial materials including metals, polymers, ceramics, concrete, wood and textiles exposed to environmental factors such as weather, seawater, and fire. Divided into sections which deal with analysis, types of degradation, protection and surface engineering respectively, the reader is introduced to the wide variety of environmental effects and what can be done to control them. The expert contributors to this book provide a wealth of insider knowledge and engineering knowhow, complementing their explanations and advice with Case Studies from areas such as pipelines, tankers, packaging and chemical processing equipment ensures that the reader understands the practical measures that can be put in place to save money, lives and the environment. The Handbook’s broad scope introduces the reader to the effects of environmental degradation on a wide range of materials, including metals, plastics, concrete,wood and textiles For each type of material, the book describes the kind of degradation that effects it and how best to protect it Case Studies show how organizations from small consulting firms to corporate giants design and manufacture products that are more resistant to environmental effects
Download or read book Polymer and Ceramic Composite Materials written by Noureddine Ramdani and published by CRC Press. This book was released on 2019-02-07 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes recent advances in the fabrication methods, properties, and applications of various ceramic-filled polymer matrix composites. Surface-modification methods and chemical functionalization of the ceramic fillers are explored in detail, and the outstanding thermal and mechanical properties of polymer–ceramic composites, the modeling of some of their thermal and mechanical parameters, and their major potential applications are discussed along with detailed examples. Aimed at researchers, industry professionals, and advanced students working in materials science and engineering, this work offering a review of a vast number of references in the polymer–ceramic field, this work helps readers easily advance their research and understanding of the field.
Download or read book SAMPE Symposium and Exhibition written by Benjamin M. Rasmussen and published by . This book was released on 2002 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Functional Condensation Polymers written by Charles E. Carraher Jr. and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although in nature the vast majority of polymers are condensation polymers, much publicity has been focused on functionalized vinyl polymers. Functional Condensation Polymers fulfills the need to explore these polymers which form an increasingly important and diverse foundation in the search for new materials in the twentyfirst century. Some of the advantages condensation polymers hold over vinyl polymers include offering different kinds of binding sites, their ability to be made biodegradable, and their different reactivities with various reagents under diverse reaction conditions. They also offer better tailoring of end-products, different tendencies (such as fiber formation), and different physical and chemical properties. Some of the main areas emphasized include dendrimers, control release of drugs, nanostructure materials, controlled biomedical recognition, and controllable electrolyte and electrical properties.
Download or read book Atomic Oxygen Protection of Materials in Low Earth Orbit written by and published by . This book was released on 2002 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Materials Interfaces written by D. Wolf and published by Springer Science & Business Media. This book was released on 1992-10-31 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many of the most important properties of materials in high-technology applications are strongly influenced or even controlled by the presence of solid interfaces. In this work, leading international authorities review the broad range of subjects in this field focusing on the atomic level properties of solid interfaces.
Download or read book Polyimides written by Mariana-Dana Damaceanu and published by Elsevier. This book was released on 2023-12-05 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyimides: Advances in Blends and Nanocomposites brings together the latest research in the area of polyimide-based blends and nanocomposites, opening the door to a range of cutting-edge applications. The book begins by discussing polyimide architectures, synthetic pathways, processing, properties, challenges and application potential before introducing polyimide-based blends and nanocomposites and explaining the modification of polyimide chains for high performance composites matrices. This is followed by chapters offering detailed, methodical coverage of each main type of blend and nanocomposite, covering preparation techniques, structures, properties and current and emerging applications.Throughout the book's chapters, there is an emphasis on methods for high-performance polyimide-based materials, with a constant orientation towards applications and additional in-depth coverage at the end of the book on three key application areas, gas separation, fuel cells, and biomedical applications. This is a valuable resource for researchers and advanced students across polymer science, composite science, nanotechnology, materials chemistry, biomaterials, and chemical engineering, as well as R&D professionals, scientists and engineers working with polyimide-based materials for advanced industrial applications. Provides comprehensive coverage of the different types of polyimide blends and nanocomposites Offers a systematic approach, covering synthesis, characterization, properties and applications Guides the reader towards a range of state-of-the-art applications such as fuel cells and biomedical applications
Download or read book Protection of Materials and Structures from Space Environment written by Jacob I. Kleiman and published by AIP Conference Proceedings / M. This book was released on 2009-01-15 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt: The conference proceedings are discussing the latest developments in the area of the effects of the space environment on materials and structures and the ways to prevent and/or reduce them. The effects of various space environment factors like atomic oxygen, vacuum ultraviolet radiation, charging, micrometeoroids, meteoroid showers, etc. on materials and structures in various space conditions are discussed. In addition the ways to prevent these effects or reduce them through protection by coatings or modification of affected surfaces are considered in the book. The discussions on development of predictive models of material erosion that will allow the materials engineers and designers of future spacecraft to evaluate materials' behavior is continued from the past meetings.
Download or read book Characterization of Interphases Between PMDA 4 BDAF Polyimides and Silver and Graphite Substrates Using X Ray Photoelectron Spectroscopy written by and published by . This book was released on 1991 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interfaces formed by curing the polyamic acid (PAA) of pyromellitic dianhydride (PMDA)/2,2-bis(4-(4-aminophenoxy( -phenyl)-hexa-fluoropropane (4- BDAF) polyimide against silver substrates were characterized by x-ray photoelectron spectroscopy (XPS). The C(ls) multiplex spectra of PAA films cured against thick silver films were more similar to those obtained before curing than to those for the bulk PMDA/4-BDAF polyimide, indicating that curing of the polymer was inhibited by interaction of the PAA with the silver substrate. This was evidenced by observing a peak shifted upward by 3.2 eV from the main carbon peak near 284.6 eV which consisted of two overlapping peaks characteristic of the amide and carboxylate groups. Moreover, the main peak observed near 400.4 eV in the N(1s) spectra was attributed to the amides.
Download or read book Handbook of Gas Sensor Materials written by Ghenadii Korotcenkov and published by Springer Science & Business Media. This book was released on 2013-09-18 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: The two volumes of Handbook of Gas Sensor Materials provide a detailed and comprehensive account of materials for gas sensors, including the properties and relative advantages of various materials. Since these sensors can be applied for the automation of myriad industrial processes, as well as for everyday monitoring of such activities as public safety, engine performance, medical therapeutics, and in many other situations, this handbook is of great value. Gas sensor designers will find a treasure trove of material in these two books.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1993 with total page 796 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 1992-03 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 1460 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.
