Characterization Of Perfectly Alternating Polycarbonate Polydimethylsiloxane Block Copolymers
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Characterization Of Perfectly Alternating Polycarbonate Polydimethylsiloxane Block Copolymers
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Author : Thomas F. Davidson
language : en
Publisher:
Release Date : 1979
Characterization Of Perfectly Alternating Polycarbonate Polydimethylsiloxane Block Copolymers written by Thomas F. Davidson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Block copolymers categories.
Synthesis And Characterization Of Polycarbonate Polydimethylsiloxane Block Copolymers
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Author : Judy S. Riffle
language : en
Publisher:
Release Date : 1980
Synthesis And Characterization Of Polycarbonate Polydimethylsiloxane Block Copolymers written by Judy S. Riffle and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Block copolymers categories.
Structure Property Relationships Of Perfectly Alternating Polycarbonate Polydimethylsiloxane Block Copolymers
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Author : Solomon Hsing-Kuo Tang
language : en
Publisher:
Release Date : 1981
Structure Property Relationships Of Perfectly Alternating Polycarbonate Polydimethylsiloxane Block Copolymers written by Solomon Hsing-Kuo Tang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Block copolymers categories.
Macromolecular Chemistry
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Author : A D Jenkins
language : en
Publisher: Royal Society of Chemistry
Release Date : 2007-10-31
Macromolecular Chemistry written by A D Jenkins and has been published by Royal Society of Chemistry this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-10-31 with Technology & Engineering categories.
Specialist Periodical Reports provide systematic and detailed review coverage of progress in the major areas of chemical research. Written by experts in their specialist fields the series creates a unique service for the active research chemist, supplying regular critical in-depth accounts of progress in particular areas of chemistry. For over 80 years the Royal Society of Chemistry and its predecessor, the Chemical Society, have been publishing reports charting developments in chemistry, which originally took the form of Annual Reports. However, by 1967 the whole spectrum of chemistry could no longer be contained within one volume and the series Specialist Periodical Reports was born. The Annual Reports themselves still existed but were divided into two, and subsequently three, volumes covering Inorganic, Organic and Physical Chemistry. For more general coverage of the highlights in chemistry they remain a 'must'. Since that time the SPR series has altered according to the fluctuating degree of activity in various fields of chemistry. Some titles have remained unchanged, while others have altered their emphasis along with their titles; some have been combined under a new name whereas others have had to be discontinued. The current list of Specialist Periodical Reports can be seen on the inside flap of this volume.
Synthesis And Morphology Characterization Of Polydimethylsiloxane Containing Block Copolymers
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Author : Maurice Wadley
language : en
Publisher:
Release Date : 2011
Synthesis And Morphology Characterization Of Polydimethylsiloxane Containing Block Copolymers written by Maurice Wadley and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Block copolymers categories.
The thin film morphology characteristics of polydimethylsiloxane-containing block copolymers have been investigated. For this investigation, a commercially available hydroxyl terminated PDMS was purchased from Gelest and attached to a carboxylic acid functional reversible addition-fragmentation chain transfer (RAFT) agent by Steglich esterification. This produced macro-RAFT agents to which styrene monomer was polymerized. By using this approach the generation of low polydispersity polystyrene-block-polydimethylsiloxane (PS-block-PDMS) copolymers of various molecular weights spanning a wide volume fraction range in which the PDMS block remained the same in each polymerization. Synthesized block copolymers were characterized by gel permeation chromatography (GPC) and nuclear magnetic resonance (NMR) spectroscopy. Bulk and thin film characterization of PS-block-PDMS copolymers was done by small-angle x-ray scattering (SAXS), transmission electron microscopy (TEM), contact angle measurements, scanning force microscopy (SFM), and grazing incidence small-angle X-ray scattering (GISAXS). The following observations have been made. For PS-rich PS-block-PDMS copolymer thin films the low surface tension of PDMS caused it to migrate to the film surface regardless of solvent choice. The surface morphology was found to depend strongly on the solubility parameter of the solvent and exhibited SFM images consistent with parallel cylinder, perforated lamellar, and lamellar surface layers with increasing solvent solubility parameter. This behavior was due to the selective swelling of the individual blocks under slightly selective, good solvent conditions. A custom solvent annealing apparatus provided similar results in which order-order transitions in the thin films were observed with increasing solvent solubility parameter. Additionally improvements in the long-range order were observed after 1 h of solvent annealing. PS-rich PS-block-PDMS copolymer thin films also displayed PDMS rich surfaces after casting. Etching of this wetting layer by exposure to ultraviolet/ozone (UVO) cleaner allowed characterization of the interior film morphology. GISAXS was also able to characterize domain orientation in the as-cast and selectively etched thin films. PDMS cylinder orientation in PS-block-PDMS copolymer was found to be dependent on solvent choice and polymer molecular weight. The likely mechanism for perpendicularly oriented PDMS cylinders in selective solvents was an order-order transition to spheres where cylinders would nucleate at the air/film surface and template a perpendicularly oriented morphology during evaporation induced ordering. Perpendicularly oriented PDMS cylinders were observed in the lower molecular weight PS-rich PS-block-PDMS thin film samples indicating a preferential molecular weight range for the formation of perpendicular domains. Solvent annealing in PS selective chlorobenzene improved the long range order, but was not a strong driving force in altering domain orientation.
Organosilicon Compounds
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Author : Vladimir Ya Lee
language : en
Publisher: Academic Press
Release Date : 2017-09-25
Organosilicon Compounds written by Vladimir Ya Lee and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-09-25 with Science categories.
Organosilicon Compounds: Experiment (Physico-Chemical Studies) and Applications, volume 2, also contains two parts. In its first part, Experiment (Physico-Chemical Studies), the application of modern instrumental tools (such as X-ray crystallography, 29Si NMR spectroscopy, UV-Photoelectron Spectroscopy, and other methods) for assessing the structures of organosilicon compounds is described. The second part, Applications, reviews the current research in the field of material science, specifically the use of organosilicon compounds in synthetic chemistry directed towards the creation of new materials. Organosilicon Compounds: From Theory to Synthesis to Applications provides a comprehensive overview of this important area of organic and organometallic chemistry, dealing with compounds containing carbon–silicon bonds. This field, which includes compounds that are widely encountered in commercial products such as in the fabrication of sealants, adhesives, and coatings, has seen many milestone discoveries reported during the last two decades. Beginning with the theoretical aspects of organosilicon compounds’ structure and bonding, the book then explores their synthetic aspects, including main group element organosilicon compounds, transition metal complexes, silicon cages and clusters, low-coordinate organosilicon derivatives (cations, radicals, anions, multiple bonds to silicon, silaaromatics), and more. Next, readers will find valuable sections that explore physical and chemical properties of organosilicon compounds by means of X-ray crystallography, 29Si NMR spectroscopy, photoelectron spectroscopy, and other methods. Finally, the work delves into applications for industrial uses and in many related fields, such as polymers, material science, nanotechnology, bioorganics, and medicinal silicon chemistry. Features valuable contributions from prominent experts cover both fundamental (theoretical, synthetic, physico-chemical) and applied (material science, applications) aspects of modern organosilicon chemistry Covers important breakthroughs in the field as well as with the historically significant achievements of the past Includes applied information for a wide range of specialists from junior and senior researchers (from both academia and industry), working in organometallic, organosilicon, main group element, transition metal, and industrial silicon chemistry, as well as those from interdisciplinary fields such as polymer, material science, nanotechnology
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1982
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Aeronautics categories.
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.
Dissertation Abstracts International
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Author :
language : en
Publisher:
Release Date : 1984
Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Dissertations, Academic categories.
Macromolecular Chemistry
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Author :
language : en
Publisher:
Release Date : 1984
Macromolecular Chemistry written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Macromolecules categories.
Membrane Materials For Gas And Separation
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Author : Yuri Yampolskii
language : en
Publisher: John Wiley & Sons
Release Date : 2017-01-10
Membrane Materials For Gas And Separation written by Yuri Yampolskii and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-01-10 with Technology & Engineering categories.
Si containing polymers have been instrumental in the development of membrane gas separation practices since the early 1970s. Their function is to provide a selective barrier for different molecular species, where selection takes place either on the basis of size or on the basis of physical interactions or both. Combines membrane science, organosilicon chemistry, polymer science, materials science, and physical chemistry Only book to consider polymerization chemistry and synthesis of Si-containing polymers (both glassy and rubbery), and their role as membrane materials Membrane operations present environmental benefits such as reduced waste, and recovered/recycled valuable raw materials that are currently lost to fuel or to flares