Thermal Transport Properties Of Polymers
DOWNLOAD
Download Thermal Transport Properties Of Polymers PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Thermal Transport Properties Of Polymers book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Thermal Transport Properties Of Polymers
DOWNLOAD
Author : A. Y. Abdulla
language : en
Publisher:
Release Date : 1987
Thermal Transport Properties Of Polymers written by A. Y. Abdulla and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with categories.
A New Method For Measuring The Thermal Transport Properties Of Polymers In The Solid State Range Of Temperatures
DOWNLOAD
Author : Mohammed Anis
language : en
Publisher:
Release Date : 1967
A New Method For Measuring The Thermal Transport Properties Of Polymers In The Solid State Range Of Temperatures written by Mohammed Anis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Polymerization categories.
The Thermal Transport Properties Of Polymers
DOWNLOAD
Author : David Hands
language : en
Publisher:
Release Date : 1976
The Thermal Transport Properties Of Polymers written by David Hands and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with categories.
The theories of thermal transport in polymers, which are mainly qualitative, are reviewed. The behaviour of amorphous polymers is better understood than that of partially crystalline ones. An apparatus for measuring the thermal conductivity of solid and molten polymers from room temperature to 250 degrees C is described. 'Edge effects' are eliminated by enclosing the heat source and samples inside the heat sink; hence guard rings are not used. The heat flow is three dimensional and the conductivity is obtained by a numerical calculation. Two disc shaped samples 48mm diameter and 2mm thick are required. An apparatus for measuring the thermal diffusivity of solid and molten polymers from room temperature to 250 degrees C is also described. Disc samples the same size as for the conductivity apparatus are used and the heat equation is again solved numerically. Conductivity and diffusivity results are reported for high density polyethylene, polypropylene, three grades of polymethyl methacrylate, three grades of polystyrene, and a series of carbon black filled natural rubber compounds. To show the effect of molecular weight, conductivity results for a range of polyethylene glycols and a range of silicone fluids are also presented.
Thermal Transport Properties Of Polymers
DOWNLOAD
Author : D. I. Smith
language : en
Publisher:
Release Date : 1987
Thermal Transport Properties Of Polymers written by D. I. Smith and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Chemistry, Organic categories.
Thermal Transport Properties In Polymers And Hybrid Materials
DOWNLOAD
Author : Hao Ma
language : en
Publisher:
Release Date : 2020
Thermal Transport Properties In Polymers And Hybrid Materials written by Hao Ma and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
Understanding thermal transport processes can guide the rational design of devices and systems for thermal energy conversion and management. Despite the significant progress in thermal transport of inorganic crystals, thermal transport in complicated materials, such as polymers and hybrid materials, remains largely unexplored. This thesis first presents our discovery of the large thermal rectification effects in the novel tapered bottlebrush polymers using nonequilibrium molecular dynamic simulations. In sharp contrast to all other reported asymmetric nanostructures, we observed that the heat current from the wide end to the narrow end in tapered bottlebrush polymers is smaller than that in the opposite direction. It was demonstrated that a more disordered to less disordered structural transition within tapered bottlebrush polymers is essential for generating non-linearity in heat conduction for thermal rectification. Moreover, the thermal rectification factor increases with device length, reaching as high as ~70% with a device length of 28.5nm. This large thermal rectification with strong length dependence uncovers an unprecedented phenomenon - diffusive thermal transport in the forward direction and ballistic thermal transport in the backward direction. This thesis then focuses on thermal transport properties in hybrid materials: graphene-C60 heterostructures and hybrid organic-inorganic (CH3NH3)3Bi2I9 crystals. Graphene-C60 heterostructures assembled by van der Waals interactions between graphene and C60 have shown exciting potential for multifunctional devices. Understanding thermal transport in graphene-C60 heterostructures is the key to guiding the design of vdW heterostructures with desired thermal transport properties. Our equilibrium molecular dynamics simulations found that the in-plane thermal conductivity of the graphene-C60 heterostructure is as high as about 234 W/(mK) at room temperature, exceeding those of most pure metals. On the other hand, vdW interactions enhance the interfacial thermal conductance between graphene and C60 by strengthening out-of-plane phonon couplings between graphene and C60 and increasing in-plane and out-of-plane phonon couplings of the graphene layer. Our study demonstrates that the interfacial thermal conductance of graphene-C60 heterostructure is comparable to that of graphene-hexagonal boron-nitride (hBN) heterostructure. Hybrid perovskite analogues, such as methylammonium bismuth iodide (CH3NH3)3Bi2I9, have emerged as candidate photovoltaic and thermoelectric materials due to their low toxicity and high stability. Thermal transport and phonon properties of (CH3NH3)3Bi2I9 were studied neither experimentally nor theoretically, which hinders the optimal selection and design of stable, non-toxic hybrid perovskite material for photovoltaic and thermoelectric applications. We mapped out the phonon dispersion of (CH3NH3)3Bi2I9 single crystals at 300 K using inelastic x-ray scattering. The frequencies of acoustic phonons are among the lowest of crystals. Nanoindentation measurements verified that these crystals are very compliant and considerably soft. The frequency overlap between acoustic and optical phonons results in strong acoustic-optical scattering. All these features lead to an ultralow thermal conductivity.
Study Of Transport Properties And Structure Of Extended Chian Polymers
DOWNLOAD
Author : R. Edward Barker
language : en
Publisher:
Release Date : 1985
Study Of Transport Properties And Structure Of Extended Chian Polymers written by R. Edward Barker and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with categories.
The Effect Of Temperature On The Transport Properties Of High Performance Polymers
DOWNLOAD
Author : Kevin Anthony Stevens
language : en
Publisher:
Release Date : 2016
The Effect Of Temperature On The Transport Properties Of High Performance Polymers written by Kevin Anthony Stevens and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
The transport properties of high-performance polymers are typically studied near ambient conditions. However, many separations are performed at temperatures either above or below ambient conditions. The permeability and solubility of light gases in thermally rearranged (TR) polymers were measured as a function of temperature. Solubilities decreased with increasing temperature for all samples. At low TR conversion, the sorption process initially becomes less exothermic. However, enthalpies of sorption do not significantly change with TR conversion after thermal rearrangement. Permeabilities increase with increasing temperature for all but CO2 at the highest TR conversion. As extent of thermal rearrangement increases, activation energies increase slightly before decreasing significantly at higher TR conversions. Activation energies of diffusion decreased with increasing TR conversion while enthalpies of sorption remained mostly constant. At the highest TR conversion, decreases in temperature move the polymer toward the upper right on the upper bound. Polybenzimidazoles have been the focus of increasing amounts of study due to their good H2/CO2 separation properties and high thermal stability. Gas transport properties of a novel series of polybenzimidazoles based on a new tetraaminodiphenylsulfone (TADPS) monomer have been characterized at temperatures from 35 to 190 °C. Permeability increases with increasing temperature for all gases. Separations with TADPS-based PBIs are strongly size selective, with CO2/N2, CO2/CH4, and N2/CH4 selectivities decreasing with increasing temperature. However, H2/CO2 selectivities increase with increasing temperature due to a lower activation energy of permeation for CO2 than for H2.
Transport Properties Of Polymeric Membranes
DOWNLOAD
Author : Sabu Thomas
language : en
Publisher: Elsevier
Release Date : 2017-11-20
Transport Properties Of Polymeric Membranes written by Sabu Thomas and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-11-20 with Science categories.
Transport Properties of Polymeric Membranes is an edited collection of papers that covers, in depth, many of the recent technical research accomplishments in transport characteristics through polymers and their applications. Using the transport through polymer membranes method leads to high separation efficiency, low running costs, and simple operating procedures compared to conventional separation methods. This book provides grounding in fundamentals and applications to give you all the information you need on using this method. This book discusses the different types of polymer, their blends, composites, nanocomposites and their applications in the field of liquid, gas and vapor transport. Some topics of note include modern trends and applications of polymer nanocomposites in solvent, vapor and gas transport; fundamentals and measurement techniques for gas and vapor transport in polymers; and transport properties of hydrogels. This handpicked selection of topics, and the combined expertise of contributors from global industry, academia, government and private research organizations, make this book an outstanding reference for anyone involved in the field of polymer membranes. Presents current trends in the field of transport of liquid, gas and vapor through various polymeric systems Features case studies focused on industrial applications of membrane technology, along with fundamentals of transport and materials Helps readers quickly look up a particular technique to learn key points, capabilities and drawbacks
Extending The Transient Plane Source Based Measurement For Accurate Determination Of Thermal Transport Properties In Polymer
DOWNLOAD
Author : Zijin Zeng
language : en
Publisher:
Release Date : 2024
Extending The Transient Plane Source Based Measurement For Accurate Determination Of Thermal Transport Properties In Polymer written by Zijin Zeng and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024 with Discrete element method categories.
Properties And Behavior Of Polymers 2 Volume Set
DOWNLOAD
Author : Wiley
language : en
Publisher: John Wiley & Sons
Release Date : 2012-12-03
Properties And Behavior Of Polymers 2 Volume Set written by Wiley 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 2012-12-03 with Technology & Engineering categories.
The book provides comprehensive, up-to-date information on the physical properties of polymers including, viscoelasticity, flammability, miscibility, optical properties, surface properties and more. Containing carefully selected reprints from the Wiley's renowned Encyclopedia of Polymer Science and Technology, this reference features the same breadth and quality of coverage and clarity of presentation found in the original.