Metals intercalated in graphite. III. The reactions of aromatic, olefinic, and acetylenic hydrocarbons with potassium–graphite intercalates

Abstract

Potassium–graphite intercalates (C24K) can act as a catalyst for the reduction of olefins and alkynes. C24K is a very efficient catalyst for the isomerization of cis-stilbene to trans-stilbene. C24K can promote deuterium exchange with hydrogens carried by hydrocarbons having an acidity equal to or higher than that of benzene. C24K can condense benzene to biphenyl and can isomerize 2-alkynes to 1-alkynes at low temperature.

Polystyrene/graphite nanocomposites: effect on thermal stability

“…The preparation of the initiator is a well-known procedure, first introduced by Lancette [17], [18] . Since the first stage compound, KC8, is a golden color, it is easy to observe that the preparation was successful.…”

Expandable graphite/polyamide-6 nanocomposites

“…Graphite is a layered material, consisting of a structure where carbon atoms are bound by covalent bonds to other carbons in the same plane and only van der Waals forces are acting between successive layers. Since the van der Waals forces are relatively weak, it is possible for a wide range of atoms, molecules, and ions to intercalate between graphite sheets [26], [27], [28], [29], [30] . In contrast to the clays, there is no net charge on graphite; thus, ion exchange processes like those used to organically modify clays, are not possible for graphite.…”

“…In these systems, the equilibrium melting temperature of PA-6 was reported to decrease with the graphite addition, a behaviour also attributed to the hindrance of the PA-6 chains' motion during crystallization, which resulted in less perfect PA-6 crystals [39] . Although much effort has been paid to the electrical properties of polymer/graphite nanocomposites, there are few reports regarding the effect of graphite on the thermal stability and/or flame retardancy of the polymer [26] .…”

Preparation of nanocomposites from styrene and modified graphite oxides

“…Neither of these is organophilic, if one could add something that would make the graphite organophilic, this may improve the interactions between polymer and graphite. Graphite does not undergo any ion exchange process [14], [15], [16], [17], [18] but graphite oxide (GO) will add organophilic ammonium cations between the layers.…”