The Synthesis And Assembly Of Linear Dendritic Rod Diblock Copolymers
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The Synthesis And Assembly Of Linear Dendritic Rod Diblock Copolymers
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Author : Catherine Marie Bambenek Santini
language : en
Publisher:
Release Date : 2002
The Synthesis And Assembly Of Linear Dendritic Rod Diblock Copolymers written by Catherine Marie Bambenek Santini and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
(cont.) A fundamental change in the assembly behavior of the polymers was observed at generation 4.0 (eight end-groups). In solution, the hydrodynamic and viscometric radii were found to increase to a much greater extent than expected for the generation 4.0 and 4.5 polymers, consistent with a breakdown of the spherical approximation as the dendritic block extended into a rod-like shape. Similarly, at the air/water interface, the dendritic block of generation 4.0-alkyl terminated polymers all adopted a horizontal rod configuration, while the dendritic block of the lower generation polymers took on a random coil configuration, whose shape depended on the length of the terminal alkyl groups as well as the generation number of the dendritic block. Finally, in the bulk, direct observation of the generation 4.0-dodecyl terminated polymer with TEM indicated that the polymer was adopting a rod- or worm-like conformation, while the lower generation polymers only exhibited traditional diblock copolymer or polymer brush behavior.
Synthesis And Solution State Self Assembly Of Linear Dendritic Block Copolymers
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Author : Kristoffer Keith Stokes
language : en
Publisher:
Release Date : 2007
Synthesis And Solution State Self Assembly Of Linear Dendritic Block Copolymers written by Kristoffer Keith Stokes and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
Linear-dendritic block copolymers consisting of a poly(styrene) linear block and poly(amidoamine) dendrimer block were synthesized and examined for their ability to self-assemble in both aqueous environments and organic/aqueous mixtures. These polymers were shown to assemble into vesicle structures under a variety of conditions. Furthermore, size measurements of the dendritic portion were taken by means of Langmuir-Blodgett isotherms, demonstrating both the steric area, as well as the electrostatic area occupied by the dendrimer in a monolayer. Further studies into the rapid synthesis of such systems were also undertaken, with a particular interest in use of the so-called "click" reaction to be used as a facile means toward block copolymer synthesis.
Self Assembly Of Linear Dendritic Diblock Copolymers
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Author : Mark Alan Johnson
language : en
Publisher:
Release Date : 2002
Self Assembly Of Linear Dendritic Diblock Copolymers written by Mark Alan Johnson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Linear-dendritic diblock copolymers combine the properties of dendritic macromolecules with the morphology of block copolymers, making it possible to create nanostructured materials which self assemble in the bulk state to form ordered thin films, and in solution to form highly functional micellar systems. The linear-dendritic system described here consists of 2000 molecular weight linear polyethylene oxide (PEO) with a polyamidoamine (PAMAM) dendron covalently bonded to one chain end. Specular neutron reflectivity has been used to investigate the structure of monolayers formed at an air-water interface. The dendritic end groups were functionalized with deuterated stearic acid to make the dendritic block hydrophobic, resulting in a macroamphiphile. Results indicate that stable monolayers are formed with PEO resting on the subphase and stearate groups extending into the air. Surface concentration and dendrimer generation were both found to impact monolayer formation.
Synthesis And Solution Properties Of Dendrimers And Linear Dendrimer Diblock Copolymers
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Author : Leslie Michele Passeno
language : en
Publisher:
Release Date : 2006
Synthesis And Solution Properties Of Dendrimers And Linear Dendrimer Diblock Copolymers written by Leslie Michele Passeno and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Copolymers categories.
Design Synthesis And Self Assembly Of Dendritic Rod Like Molecules With Precisely Controlled Compositions Interactions And Topologies
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Author : Ruimeng Zhang
language : en
Publisher:
Release Date : 2019
Design Synthesis And Self Assembly Of Dendritic Rod Like Molecules With Precisely Controlled Compositions Interactions And Topologies written by Ruimeng Zhang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Composite materials categories.
Liquid Crystalline Polymers
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Author : Vijay Kumar Thakur
language : en
Publisher: Springer
Release Date : 2015-11-16
Liquid Crystalline Polymers written by Vijay Kumar Thakur and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-11-16 with Technology & Engineering categories.
This book introduces anisotropic innovations in liquid crystalline polymers as well as new nanocomposite materials and testing techniques. The authors detail the newest discoveries of material properties, material types and phases, and material characterization. This interdisciplinary work creates valuable links that strengthen the approach to the evolving field of liquid crystalline polymers/ materials.
Synthesis Of Dendritic Macromolecules Hybrid Dendritic Linear Block Copolymers
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Author : Archana Desai
language : en
Publisher:
Release Date : 1997
Synthesis Of Dendritic Macromolecules Hybrid Dendritic Linear Block Copolymers written by Archana Desai and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Block copolymers categories.
Dendrimers And Other Dendritic Polymers
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Author : Jean M. J. Fréchet
language : en
Publisher: John Wiley & Sons
Release Date : 2001
Dendrimers And Other Dendritic Polymers written by Jean M. J. Fréchet 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 2001 with Science categories.
With contributions from many of the world's leading scientists in the field of dendritic research and development, Dendrimers and Other Dendritic Polymers provides a comprehensive review of this rapidly expanding and exciting new field of polymer science. Of interest to academia and industry alike, this book covers the synthesis, characterization, unique properties, potential for novel applications and technical challenges associated with these polymers. * Detailed coverage of all known subclasses of dendritic polymers, including their properties and synthesis * Insight into the potential commercial applications of dendritic polymers, including drug delivery, cancer therapy, coatings and adhesives * Identification of the key trends and perspectives in dendrimer research * Essential reference for polymer chemists, materials scientists and plastics engineers working in academia and industry alike
Synthesis Characterization And Modelling Of Pblg Pi Rod Coil Diblock Copolymers
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Author : Diane E. Bennett
language : en
Publisher:
Release Date : 1995
Synthesis Characterization And Modelling Of Pblg Pi Rod Coil Diblock Copolymers written by Diane E. Bennett and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Block copolymers categories.
Self Assembly Of Rod Coil Block Copolymers
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Author : S. Jenekhe
language : en
Publisher:
Release Date : 1999
Self Assembly Of Rod Coil Block Copolymers written by S. Jenekhe and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
Block copolymer architectures containing both rigid-rod and flexible-coil blocks have novel self-organizing features and functional properties not possible with coil-coil architectures, We describe the self-assembly of new rod-coil diblock, rod- coil-rod triblock, and coil-rod-coil triblock copolymers from solution and the resulting discrete and periodic mesostmctares with sizes in the 100 nanometer to 200 micrometer range. For example, hollow microspheres, cylindrical microtubules, disc- like lamellae, and doughnut shaped discrete objects self-organized from polyquinoline-b-polystyrene diblocks in a selective solvent for the polyquinolineLA. However, the same rod-coil diblock copolymers in a selective solvent for the polystyrene form hollow spheres which self-order into periodic mesoporous materials B.