Abstract:
A process to form a composition comprising an ethylene/vinylarene multiblock interpolymer, said process comprising polymerizing, in a single reactor, a mixture comprising ethylene, a vinylarene, and optionally an alpha-olefin, in the presence of at least the following a)-c): a) a first metal complex selected from the following Formula (A), as described herein: b) a second metal complex selected from the following Formula (B), as described herein, and c) a chain shuttling agent selected from the following: a dialkyl zinc, a trialkyl aluminum, or a combination thereof. A composition comprising an ethylene/vinylarene multiblock interpolymer comprising at least one polymer structure selected from: -(AR)-(AP)-(AR)-(AP)- (Structure 1), or (AR)-(AP)-(AR)-(AP) (Structure 2); where each (AR) segment independently comprises, in polymerized form, ethylene, > 10 mol% of the vinylarene and optionally an alpha-olefin, and wherein each (AP) segment independently comprises, ethylene, optionally ≤ 10 mol% vinylarene and optionally the alpha-olefin.
Abstract:
Embodiments are directed to catalyst systems comprising: a procatalyst; and a co-catalyst dissolved in a non-halogenated aprotic hydrocarbon solvent, the co-catalyst comprising: a non-coordinating borate dianion having the formula: (III) and two cations, each cation being independently chosen from a cation according to formula (I) or formula (II).
Abstract:
Embodiments are directed to catalyst systems comprising: a procatalyst; and a co-catalyst, the co-catalyst comprising: a non-coordinating borate anion having the formula [B(C 6 F 5 ) 4 ] 1- and a cation according to formula (I).
Abstract:
A method that includes forming ethylene from methane including contacting supported-palladium with hydrogen sulfide to form a palladium sulfide catalyst and contacting the palladium sulfide catalyst with methane to form ethylene.
Abstract:
Low molecular weight, highly branched polyolefins are provided. Also provided are catalyst-mediated methods of making the low molecular weight, highly branched polyolefins and a catalyst system for carrying out the methods. The catalyst system is a homogeneous catalytic system that includes a single-site organozirconium complex and hydrocarbon-soluble perfluoroarylborate co-catalyst that is highly active for the oligomerization of olefin monomers in non-polar media.
Abstract:
Solution-processable dielectric materials are provided, along with precursor compositions and processes for preparing the same. Composites and electronic devices including the dielectric materials also are provided.
Abstract:
The present disclosure provides a method for the oxidative dehydrogenation of an alkane, e.g., ethane, propane, etc. In embodiments, a method for oxidative dehydrogenation of an alkane comprises exposing a gas comprising an alkane having 2 or more carbons to elemental sulfur vapor at an elevated reaction temperature and for a period of time to convert the alkane to one or more products via oxidative dehydrogenation, the one or more products comprising a primary alkene.
Abstract:
In one aspect of the invention, the memristor includes a monolayer film formed of an atomically thin material, where the monolayer film has at least one grain boundary (GB), a first electrode and a second electrode electrically coupled with the monolayer film to define a memristor channel therebetween, such that the at least one GB is located in the memristor channel, and a gate electrode capacitively coupled with the memristor channel.
Abstract:
A method for depolymerizing a polyester may comprise heating a polyester at a temperature and for a period of time in the presence of a supported metal-dioxo catalyst, optionally, in the presence of H2, to induce hydrogenolysis of ester groups in the polyester and provide monomers of the polyester.
Abstract:
Form ethylene via a method that includes vaporizing elemental sulfur, providing a metal sulfide catalyst, and contacting the metal sulfide catalyst with a mixture of methane and the vaporized elemental sulfur to form ethylene. The mixture has a methane to sulfur molar ratio greater than 1.2: 1.0.