Results 291 to 300 of about 11,509 (340)

Intercalate structure, melting, and the commensurate-incommensurate transition in bromine-intercalated graphite

Physical Review B, 1983
In situ high-resolution x-ray scattering experiments have been carried out to study in-plane intercalate structure and phase transitions as a function of temperature in a single crystal graphite host. For the case of bromine-intercalated graphite the intercalate plane has three sublattices and each sublattice has a centered ($\sqrt{3}\ifmmode\times ...
A. Erbil, A. R. Kortan, R. J. Birgeneau, M. S. Dresslhaus   +3 more
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Poly(etherimide)/montmorillonite nanocomposites prepared by melt intercalation

Journal of Applied Polymer Science, 2003
AbstractA novel aromatic amine organo‐modifier synthesized in our previous work was used to treat montmorillonite (MMT) and the organo‐modified MMT was used to prepare poly(etherimide) (PEI)/MMT nanocomposites by a melt intercalation method. MMT treated by this amine exhibited large layer‐to‐layer spacing and a high ion‐exchange ratio (>95%).
Zhu‐Mei Liang, Jie Yin
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Simple “Kink” Model of Melt Intercalation in Polymer-Clay Nanocomposites

Physical Review Letters, 2001
We propose a simple semiphenomenological model to describe the dynamics of polymer melt intercalation in the gallery between the adjacent clay sheets in polymer-clay nanocomposites. Within this model, the intercalation process is driven by the motion of localized excitations ("kinks") which open up the tip between the clay sheets. These kinks belong to
V V, Ginzburg, O V, Gendelman, L I, Manevitch   +2 more
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PP/clay nanocomposites prepared by grafting-melt intercalation

Polymer, 2001
Abstract Polypropylene (PP)/clay nanocomposites (PPCN) were prepared via grafting-melt compounding by using a new kind of co-intercalation organophilic clay which had a larger interlayer spacing than the ordinarily organophilic clay only modified by alkyl ammonium.
Xiaohui Liu, Qiuju Wu
openaire   +1 more source

Melting and Staging in Graphite Intercalated with Cesium

Physical Review Letters, 1979
The order-disorder transition in Cs-intercalated graphite has been studied using x-ray scattering. In ${\mathrm{C}}_{8}$Cs the Cs layer transforms into a liquidlike phase in which the average Cs-Cs separation is incommensurate with the carbon net. Fundamentally different behavior is observed in a Cs-deficient stage-1 sample where commensurate "lattice ...
Roy Clarke, N. Caswell, S. A. Solin
openaire   +1 more source

Simulation of polymer melt intercalation in layered nanocomposites

The Journal of Chemical Physics, 1998
Polymer layered silicates form an important class of nanocomposite materials. These structures may be formed by annealing layered silicate particles, whose surfaces have been chemically modified to render them organophilic, with a polymer melt. During intercalation, polymer molecules leave the bulk melt and enter the galleries between the silicate ...
Jae Youn Lee, Arlette R. C. Baljon, Roger F. Loring, Athanassios Z. Panagiotopoulos   +3 more
openaire   +1 more source

Melt Intercalation of PMMA into Organically-Modified Layered Silicate

MRS Proceedings, 1999
ABSTRACTOrganic-inorganic hybrid nanocomposite materials of poly(methyl methacrylate) (PMMA) and organically-modified silicate (B34) systems have been prepared via melt intercalation with variation of tacticity and molecular weight as the main molecular variables. Only two of the PMMA samples (with the lowest glass transition temperatures) were able to
Z. Shen, G. P. Simon, Y-B. Cheng
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Lithium intercalation in graphites precipitated from pig iron melts

Materials Chemistry and Physics, 2003
Abstract The structural and electrochemical properties of graphitic materials precipitated from supersaturated solutions of carbon in pig iron melts were investigated. Doping of the graphite with boron was accomplished by adding ferroboron to the iron melt. X-ray diffraction patterns showed that all the products were highly crystalline graphites, and
Lee, Y.H., Pan, K.C., Lin, Y.Y., Premkumar, T., Fey, G.T.K.   +4 more
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Electrochemical intercalation of potassium into graphite in KF melt

Electrochimica Acta, 2010
Abstract Electrochemical intercalation of potassium into graphite in molten potassium fluoride at 1163 K was investigated by means of cyclic voltammetry, galvanostatic electrolysis and open-circuit potential measurements. It was found that potassium intercalated into graphite solely between graphite layers.
Dongren Liu, Zhanhong Yang, Wangxing Li, Shilin Qiu, Yingtao Luo   +4 more
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The melting of intercalant layers in C24Cs and C36Cs

Physica B+C, 1980
Abstract We have investigated the detailed ordering of the cesium intercalant layers in single-crystal and pyrolytic forms of C 24 Cs and C 36 Cs using X-ray diffuse scattering techniques. A two-dimensional RDF analysis reveals that the Cs layer has a disordered triangular structure at 300 K with a 5.95A nearest-neighbor distance and is thus, on ...
Roy Clarke, N. Caswell, S.A. Solin, P.M. Horn   +3 more
openaire   +1 more source