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Melanges Conducteurs Epoxyde Polypyrrole
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Book Synopsis Mélanges conducteurs époxyde/polypyrrole by : Caroline Cassignol
Download or read book Mélanges conducteurs époxyde/polypyrrole written by Caroline Cassignol and published by . This book was released on 1998 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA NATURE ISOLANTE DES COMPOSITES POLYMERES CONSTITUANTS CERTAINES PIECES STRUCTURALES AERONAUTIQUES NE LEUR PERMET PAS D'ELIMINER LES CHARGES ELECTROSTATIQUES QUI APPARAISSENT A LEUR SURFACE PAR FROTTEMENT AVEC L'AIR ET CAUSENT DES PERTURBATIONS DANS LES SYSTEMES ELECTRIQUES. AFIN DE RESOUDRE CES PROBLEMES ET D'AMELIORER LA PROTECTION DES AVIONS CONTRE LA FOUDRE, IL A ETE ENVISAGE DE RENDRE LES MATRICES POLYMERES DE CES COMPOSITES, CONDUCTRICES DE L'ELECTRICITE EN LEUR INSERANT UN POLYMERE CONDUCTEUR ELECTRONIQUE : LE POLYPYRROLE (PPY). LA SYNTHESE ET L'ETUDE DE QUATRE POUDRES DE PPY DIFFERANT PAR LA NATURE DE LEUR CONTRE-ION, A MONTRE QUE LES PPY CONTIENNENT UNE QUANTITE D'HUMIDITE VARIABLE SELON LA NATURE DU CONTRE-ION, QUI FAVORISE LA CONDUCTION ELECTRONIQUE INTERCHAINE ET AUGMENTE LA CONDUCTIVITE. PAR AILLEURS, DES MESURES DE CONDUCTIVITE ET DE STABILITE THERMIQUE CONFIRMENT QUE PPY/TS EST LE PLUS STABLE (T#D#E#G = 254C) ET LE PLUS CONDUCTEUR (6 S/CM). OBTENU SOUS DEUX MORPHOLOGIES DIFFERENTES PAR POLYMERISATION EN DISPERSION STABILISEE (PPY#D) OU NON (PPY#S), PPY/TS#- EST MELANGE A UNE RESINE EPOXY (RTM120) GRACE A QUATRE METHODES DE DISPERSION PLUS OU MOINS ENERGIQUES. IL APPARAIT QU'UNE METHODE DE MELANGE ENERGIQUE CASSANT LES AGGLOMERATS DE PPY EFFICACEMENT OU DES PARTICULES DE PPY PLUS GROSSES DONT LA TENDANCE A L'AGGLOMERATION EST PLUS FAIBLE, FAVORISE LA FORMATION D'UN AMAS CONDUCTEUR INFINI ET DIMINUE LA FRACTION VOLUMIQUE DE PPY A LAQUELLE LE SEUIL DE PERCOLATION APPARAIT. LA CONDUCTION ELECTRONIQUE PAR SAUT SEMBLE SE FAIRE DE FACON PLUS CONTINUE DANS PPY#S. PARMI LES MELANGES REALISES, DEUX PRESENTENT UN FAIBLE SEUIL DE PERCOLATION ET UNE CONDUCTIVITE AU SEUIL SATISFAISANTE (4.10#-#5 S/CM) : RTM120/2.8%PPY#S ET RTM120/8%PPY#D MELANGES RESPECTIVEMENT GRACE A UNE TIGE DE VERRE ET UN TURAX. L'ETUDE CINETIQUE ET RHEOLOGIQUE COMPAREE DES TROIS SYSTEMES MONTRE L'EFFET CATALYTIQUE JOUE PAR LES GROUPEMENTS HYDROXYLE PRESENTS DANS L'HUMIDITE CONTENUE DANS LE PPY. L'ACCELERATION DE LA REACTION DE RETICULATION ENTRAINE LA DIMINUTION DES TEMPERATURES OPTIMALES DE CUISSON ET L'APPARITION PLUS RAPIDE DES TRANSITIONS DE PHASE. LE MELANGE CONDUCTEUR RTM120/2.8%PPY#S PRESENTE LES CARACTERISTIQUES PHYSIQUES ET MECANIQUES LES PLUS PROCHES DE CELLES DE LA RESINE INITIALE. IL NECESSITERA DONC LES MODIFICATIONS LES PLUS MINIMES DU CYCLE DE CUISSON DES COMPOSITES STRUCTURAUX.
Book Synopsis Clay-containing Polymeric Nanocomposites by : L. A. Utracki
Download or read book Clay-containing Polymeric Nanocomposites written by L. A. Utracki and published by iSmithers Rapra Publishing. This book was released on 2004 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is Part 1 of a two-part set. Part 2 ISBN is 1859574823
Book Synopsis Flexoelectricity in Liquid Crystals by : Agnes Buka
Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Book Synopsis Alternative Fuels by : Michael F. Hordeski
Download or read book Alternative Fuels written by Michael F. Hordeski and published by The Fairmont Press, Inc.. This book was released on 2008 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Newly revised, the second edition of this pioneering work addresses emerging factors affecting energy production and use, including the availability and desirability of various fuels. The text provides extensive discussion on hydrogen sources, both solar and nuclear, and fuel cell technology, as well as other alternative fuels such as biomass, and wind power. It delves into cost analysis, regulatory issues, barriers to implementation, conversion and storage systems, thermodynamic efficiency, fuel chain efficiency, air emission issues, and safety. The book also covers natural gas hydrogen gas, methanol, ethanol, and steam reforming."--pub. desc.
Book Synopsis Modern Surface Organometallic Chemistry by : Jean-Marie Basset
Download or read book Modern Surface Organometallic Chemistry written by Jean-Marie Basset and published by John Wiley & Sons. This book was released on 2009-07-10 with total page 725 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering everything from the basics to recent applications, this monograph represents an advanced overview of the field. Edited by internationally acclaimed experts respected throughout the community, the book is clearly divided into sections on fundamental and applied surface organometallic chemistry. Backed by numerous examples from the recent literature, this is a key reference for all chemists.
Download or read book The Ionosphere written by Dave Anderson and published by . This book was released on 1999 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nanostructured Oxide Thin Films Synthesized by Spray Pyrolysis. by : Najoua Kamoun-Turki
Download or read book Nanostructured Oxide Thin Films Synthesized by Spray Pyrolysis. written by Najoua Kamoun-Turki and published by . This book was released on 2018-03 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the spray pyrolysis technique that is used to produce thin films of metallic oxides on glass substrates. Also discussed are the process variables of the spray pyrolysis process used to manufacture specific structures such as nanostructured thin films.
Book Synopsis Nonlinear Optical Materials by : Jerome V. Moloney
Download or read book Nonlinear Optical Materials written by Jerome V. Moloney and published by Springer Science & Business Media. This book was released on 1998-08-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.
Book Synopsis Magnetosphere-Ionosphere Coupling in the Solar System by : Charles R. Chappell
Download or read book Magnetosphere-Ionosphere Coupling in the Solar System written by Charles R. Chappell and published by John Wiley & Sons. This book was released on 2016-10-31 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over a half century of exploration of the Earth’s space environment, it has become evident that the interaction between the ionosphere and the magnetosphere plays a dominant role in the evolution and dynamics of magnetospheric plasmas and fields. Interestingly, it was recently discovered that this same interaction is of fundamental importance at other planets and moons throughout the solar system. Based on papers presented at an interdisciplinary AGU Chapman Conference at Yosemite National Park in February 2014, this volume provides an intellectual and visual journey through our exploration and discovery of the paradigm-changing role that the ionosphere plays in determining the filling and dynamics of Earth and planetary environments. The 2014 Chapman conference marks the 40th anniversary of the initial magnetosphere-ionosphere coupling conference at Yosemite in 1974, and thus gives a four decade perspective of the progress of space science research in understanding these fundamental coupling processes. Digital video links to an online archive containing both the 1974 and 2014 meetings are presented throughout this volume for use as an historical resource by the international heliophysics and planetary science communities. Topics covered in this volume include: Ionosphere as a source of magnetospheric plasma Effects of the low energy ionospheric plasma on the stability and creation of the more energetic plasmas The unified global modeling of the ionosphere and magnetosphere at the Earth and other planets New knowledge of these coupled interactions for heliophysicists and planetary scientists, with a cross-disciplinary approach involving advanced measurement and modeling techniques Magnetosphere-Ionosphere Coupling in the Solar System is a valuable resource for researchers in the fields of space and planetary science, atmospheric science, space physics, astronomy, and geophysics. Read an interview with the editors to find out more: https://eos.org/editors-vox/filling-earths-space-environment-from-the-sun-or-the-earth
Book Synopsis Gazette Du Bureau Des Brevets by : Canada. Patent Office
Download or read book Gazette Du Bureau Des Brevets written by Canada. Patent Office and published by . This book was released on 1985 with total page 1096 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes annual cumulative index of inventors and patentees.
