Abstract:
A method for preparing an article comprising providing a crosslinked olefin fabricated article; treating the fabricated article with a treating agent, the treating agent comprising a liquid comprising a phosphorous containing compound, and stabilizing the fabricated article by air oxidation. A method for preparing an article comprising providing an olefin resin; melt blending the olefin resin with a treating agent to provide a treated olefin resin, the treating agent comprising a phosphorous containing compound; forming a fabricated article from the treated olefin resin; crosslinking the fabricated article, and stabilizing the fabricated article by air oxidation. The composition of a precursor polyolefin article. The composition of a stabilized polyolefin article.
Abstract:
La presente invención está relacionada con electrodos con nanoespacios entre 4 y 17 nm obtenidos a partir de nanofibras suspendidas de carbono vítreo con una longitud mayor a 2 μm, diseñados para su aplicación en el área de la nanotecnología en la fabricación de nanosensores.
Abstract:
The present disclosure describes a method for preparing a carbonized article comprising: providing an olefin resin in a melt phase; treating the olefin resin with a boron-containing species (BCS); forming a fabricated article from the treated olefin resin; crosslinking the fabricated article; stabilizing the fabricated article by air oxidation; and carbonizing the fabricated article. The present disclosure further describes a method for preparing a stabilized article.
Abstract:
Beschrieben wird ein Verfahren zur Herstellung von Formkörpern, insbesondere von Fasern oder Folien, auf der Basis von modifizierten Polyolefinen und/oder modifizierten Polyamiden. Dieses Verfahren ist dadurch gekennzeichnet, dass 1.) thermoplastische Formkörper auf Basis von thermoplastischen Polyolefinen, die auf Monomere mit einer Doppelbindung zurückgehen, oder von thermoplastischen Polyamiden als Ausgangsmaterial herangezogen werden, 2.) die Polyolefine oder Polyamide des Formkörpers vernetzt und 3.) die vernetzten Polyolefine oder vernetzten Polyamide mit aktiviertem elementarem Schwefel sulphuriert werden. Die hiernach erhaltenen modifizierten Formkörper lassen sich vorteilhaft durch Carbonisierung und gegebenenfalls anschließendes Graphitisieren in Carbonformkörper überführen. Die sulphurierten modifizierten Formkörper sind wirtschaftlich und in vorteilhafter Weise herstellbar und zeichnen sich insbesondere dadurch aus, dass aus einem sulphurierten thermoplastischem Polymer in einer einzigen Hochtemperaturbehandlung beliebige Formkörper aus verdichtetem turbostratischem Kohlenstoff oder Graphit mit sehr hohen Kohlenstoffausbeuten hergestellt werden können.
Abstract:
The invention is directed to melt-processable carbon fiber precursors which have the capability of thermal stabilization in air followed by carbonization in inert atmosphere which make them cost effective and widen their applications.
Abstract:
A new class of cost-effective carbon fiber precursors that comprise both hydrocarbon polymer and Pitch structural features in the same polymer structure to exhibit complementary advantages of both PAN- and Pitch-based carbon fiber precursors. The new class of carbon fiber precursors comprise a polymeric pitch copolymer, wherein the polymeric pitch copolymer includes a polymer chain and several pitch polycyclic aromatic hydrocarbon (PAH) molecules grafted or chemically bonded to the polymer chain. Method and processes for the creation of the new class of carbon fiber precursors are also presented, wherein said methods may comprise a thermally-induced coupling and extrusion step.
Abstract:
A carbonaceous fiber is prepared from a polyolefin fiber. The polyolefin fiber is stabilized and is treated with a silicon source. In one instance the silicon source is a siloxane. In one instance the polyolefin fiber is stabilized by sulfonation. In one instance the carbonaceous fiber has 90-100 weight percent Carbon, 0.1-1 weight percent Silicon, 0.1-1 weight percent Nitrogen.
Abstract:
A process for preparing a stabilized fabricated article from a polyolefin resin, the process includes incorporating functional groups in the polyolefin resin thereby yielding a polyolefin resin having crosslinkable functional groups. The polyolefin resin having crosslinkable functional groups is converted to a fabricated article. The fabricated article is chemically crosslinked thereby yielding a crosslinked fabricated article. The crosslinked fabricated article is stabilized in an oxidizing environment at an elevated temperature. The stabilized fabricated article thus produced can be prepared as a carbonaceous article by heating the stabilized fabricated article in an inert environment.