Synthèse et étude physico-chimique de nouvelles architectures macromoléculaires à base de polysiloxanes fonctionnels PDF Download
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Author: Sophie Goldblum
Publisher:
ISBN:
Category :
Languages : fr
Pages : 179
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Book Description
[Résumé en français] Des polysiloxanes porteurs de groupements 4-chlorométhylphényléthyle ont été synthétisés (homopolymères, copolymères statistiques et à blocs). La fonction chlorobenzyle permet de modifier chimiquement ces polymères. Une première modification est la quaternisation d’amines tertiaires par le polymère. La seconde consiste à utiliser ces polysiloxanes fonctionnels comme macroamorceurs pour la polymérisation radicalaire contrôlée par ATRP du styrène et du chlorométhylstyrène. Les propriétés physico-chimiques des polymères synthétisés ont été étudiées en masse et en solution. Les Tg ont été déterminées, ainsi que les énergies de surface des films et les propriétés bactéricides des films quaternisés. La formation d’agrégats en solution aqueuse a été étudiée par fluorescence. Toutes ces études montrent que ces matériaux sont fortement hétérophasés en raison de l’incompatibilité du PDMS et du polystyrène, et de l’agrégation des ammonium quaternaires à longue chaîne hydrocarbonée.
Author: Sophie Goldblum
Publisher:
ISBN:
Category :
Languages : fr
Pages : 179
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Book Description
[Résumé en français] Des polysiloxanes porteurs de groupements 4-chlorométhylphényléthyle ont été synthétisés (homopolymères, copolymères statistiques et à blocs). La fonction chlorobenzyle permet de modifier chimiquement ces polymères. Une première modification est la quaternisation d’amines tertiaires par le polymère. La seconde consiste à utiliser ces polysiloxanes fonctionnels comme macroamorceurs pour la polymérisation radicalaire contrôlée par ATRP du styrène et du chlorométhylstyrène. Les propriétés physico-chimiques des polymères synthétisés ont été étudiées en masse et en solution. Les Tg ont été déterminées, ainsi que les énergies de surface des films et les propriétés bactéricides des films quaternisés. La formation d’agrégats en solution aqueuse a été étudiée par fluorescence. Toutes ces études montrent que ces matériaux sont fortement hétérophasés en raison de l’incompatibilité du PDMS et du polystyrène, et de l’agrégation des ammonium quaternaires à longue chaîne hydrocarbonée.
Author: Sébastien Forget
Publisher: Springer
ISBN: 3642367054
Category : Science
Languages : en
Pages : 179
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Book Description
Organic lasers are broadly tunable coherent sources, potentially compact, convenient and manufactured at low-costs. Appeared in the mid 60’s as solid-state alternatives for liquid dye lasers, they recently gained a new dimension after the demonstration of organic semiconductor lasers in the 90's. More recently, new perspectives appeared at the nanoscale, with organic polariton and surface plasmon lasers. After a brief reminder to laser physics, a first chapter exposes what makes organic solid-state organic lasers specific. The laser architectures used in organic lasers are then reviewed, with a state-of-the-art review of the performances of devices with regard to output power, threshold, lifetime, beam quality etc. A survey of the recent trends in the field is given, highlighting the latest developments with a special focus on the challenges remaining for achieving direct electrical pumping of organic semiconductor lasers. A last chapter covers the applications of organic solid-state lasers.
Author: Bo Song
Publisher: Springer
ISBN: 3319224522
Category : Technology & Engineering
Languages : en
Pages : 265
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Book Description
Dynamic Behavior of Materials, Volume 1 represents the first of nine volumes of technical papers presented at the Society for Experimental Mechanics SEM 15th International Congress & Exposition on Experimental and Applied Mechanics, held at Costa Mesa, California, June 8-11, 2015. The full set of proceedings also includes volumes on: Challenges in Mechanics of Time Dependent Materials, Advancement of Optical Methods in Experimental Mechanics, Experimental and Applied Mechanics 16th International Symposium on MEMS and Nanotechnology, 5th International Symposium on the Mechanics of Biological Systems and Materials, International Symposium on the Mechanics of Composite and Multi-functional Materials, Fracture, Fatigue, Failure and Damage Evolution; and Residual Stress, Thermomechanics & Infrared Imaging, Hybrid Techniques and Inverse Problems.
Author: Yannick Guari
Publisher:
ISBN: 9780429653766
Category : MEDICAL
Languages : en
Pages :
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Book Description
Nanochemistry tools aid the design of Prussian blue and its analogue nanoparticles and nanocomposites. The use of such nanomaterials is now widely regarded as an alternative to other inorganic nanomaterials in a variety of scientific applications. This book, after addressing Prussian blue and its analogues in a historical context and their numerous applications over time, compiles and details the latest cutting-edge scientific research on these nanomaterials. It compiles and deatils the latest cutting-edge scientific research on these nanomaterials. The book provides an overview of the methodological concepts of the nanoscale synthesis of Prussian blue and its analogues, as well as the study and understanding of their properties and of the extent and diversity of application fields in relation to the major societal challenges of the 21st century on energy, environment, and health.
Author: Fabien Bretenaker
Publisher: World Scientific
ISBN: 9814612421
Category : Science
Languages : en
Pages : 185
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Book Description
This unique book provides an overview of the principle and applications of lasers enriched with numerous illustrations.Being over fifty years old, lasers continue to amaze us. Their performance characteristics are constantly reaching new limits, and the scope of their applications continues to expand. Yet, it took years of effort by teams of physicists to transform the fundamental notions of Einstein into the first experimental beam of laser light. And history is still going on as fundamental research is now triggered by its remarkable properties.This book addresses every aspects of laser light, from its fundamental principles to its industrial applications, at a level particularly suited for high school teachers, students, and anybody curious about science and technology.
Author: Ulrich Schubert
Publisher: Springer Science & Business Media
ISBN: 3211751254
Category : Technology & Engineering
Languages : en
Pages : 220
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Book Description
Materials syntheses are more complex than syntheses of inorganic or organic compounds. Materials synthesis protocols often suffer from unclarities, irreproducibility, lack in detail and lack in standards. The need to change this situation is the main motivation for this book. It collects a number of detailed protocols, ranging from organic polymers to carbonaceous and ceramic materials, from gels to porous and layered materials and from powders and nanoparticles to films.
Author: John D. Wright
Publisher: CRC Press
ISBN: 1482283166
Category : Science
Languages : en
Pages : 136
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Book Description
Sol-Gel processing methods, first used historically for decorative and constructional materials, were extensively developed in the last century for applications such as glasses, ceramics, catalysts, coatings, composites and fibres. Today they are reaching their full potential, enabling the preparation of new generations of advanced materials not easily accessible by other methods yet using mild, low-energy conditions. The topic is therefore increasingly included in advanced undergraduate, MSc and PhD programmes in the areas of chemistry, physics and materials science. This concise introductory text, written at the advanced undergraduate/first-year postgraduate level, is also suitable as an introduction to the development, mechanisms, chemistry, characterisation methods and applications of the technique. It provides readers with an extensive yet concise grounding in the theory of each area of the subject and details the real and potential applications and the future prospects of sol-gel chemistry.
Author: P.M. Visakh
Publisher: Woodhead Publishing
ISBN: 0081004273
Category : Technology & Engineering
Languages : en
Pages : 344
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Book Description
Recent Developments in Polymer Macro, Micro and Nano Blends: Preparation and Characterisation discusses the various types of techniques that are currently used for the characterization of polymer-based macro, micro, and nano blends. It summarizes recent technical research accomplishments, emphasizing a broad range of characterization methods. In addition, the book discusses preparation methods and applications for various types of polymer-based macro, micro, and nano blends. Chapters include thermoplastic-based polymer & nano blends, applications of rubber based and thermoplastic blends, micro/nanostructures polymer blends containing block copolymers, advances in polymer-inorganic hybrids as membrane materials, synthesis of polymer/inorganic hybrids through heterophase polymerizations, nanoporous polymer foams from nanostructured polymer blends, and natural polymeric biodegradable nano blends for protein delivery. - Describes the techniques pertaining to a kind (or small number) of blends, showing specific examples of their applications - Covers micro, macro, and nano polymer blends - Contains contributions from leading experts in the field
Author: Anant V. Narlikar
Publisher: Springer Science & Business Media
ISBN: 3662077647
Category : Technology & Engineering
Languages : en
Pages : 585
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Book Description
In contrast to research on the fundamental mechanisms of High-Temperature Superconductivity, in recent years we have seen enormous developments in the fabrication and application of High-Tc-superconductors. The two volumes of High Temperature Superconductivity provide a survey of the state of the technology and engineering applications of these materials. They comprise extended original research papers and technical review articles written by physicists, chemists, materials scientists and engineers, all of them noted experts in their fields. The interdisciplinary and strictly application-oriented coverage should benefit graduate students and academic researchers in the mentioned areas as well as industrial experts. Volume 1 "Materials" focuses on major technical advancements in High-Tc materials processing for applications. Volume 2 "Engineering Applications" covers numerous application areas where High-Tc superconductors are making tremendous impact.
