Abstract:
PROBLEM TO BE SOLVED: To provide a method of producing a polymer having a composition and a controlled molecular weight distribution.SOLUTION: In making an ethylene/α-olefin interpolymer composition, by changing the mole fraction of ethylene and α-olefin upon bringing a pre-catalyst and a monomer into contact with each other, the molecular weight distribution of the interpolymer can be controlled. The pre-catalyst is selected from the group consisting of a hydrocarbylamine substituted heteroaryl compound or a mixture thereof.
Abstract:
Ethylene-based polymers of this disclosure include an average g′ less than 0.86, where the average g′ is an intrinsic viscosity ratio determined by gel permeation chromatography using a triple detector; and a molecular weight tail quantified by an MWD area metric, ATAIL, and ATAIL is less than or equal to 0.04 as determined by gel permeation chromatography using a triple detector.
Abstract:
Embodiments of this disclosure include polymers comprising the polymerized product of ethylene, at least one diene comonomer, and optionally at least one C3 to C14 comonomer. The polymer comprises tri -functional long-chain branches resulting from the diene that occur at a frequency of at least 0.03 per 1000 carbon atoms of the polymer. The diene has a structure according to formula (I):
Abstract:
Ethylene-based polymers of this disclosure include a melt viscosity ratio (V0.1/V100) at 190° C. of at least 10, where V0.1 is the viscosity of the ethylene-based polymer at 190° C. at a shear rate of 0.1 radians/second, and V100 is the viscosity of the ethylene-based polymer at 190° C. at a shear rate of 100 radians/second; and a molecular weight tail quantified by an MWD area metric, ATAIL, and ATAIL is less than or equal to 0.04 as determined by gel permeation chromatography using a triple detector.
Abstract:
Un proceso de polimerización que comprende: polimerizar etileno, o uno o más monómeros de alfa-olefina (C3-C12), o una combinación de etileno y uno o más monómeros de alfa-olefina (C3-C12), en presencia de al menos un sistema catalizador, comprendiendo el sistema catalizador un complejo de fosfaguanidina de acuerdo con la fórmula I **(Ver fórmula)** donde R1 y R5 incluyen restos iguales o diferentes seleccionados de restos hidruro, alifáticos, heteroalifáticos, aromáticos y heteroaromáticos; R2 y R4 incluyen los restos iguales o diferentes seleccionados de restos alifáticos, restos heteroalifáticos, restos aromáticos o restos heteroaromáticos; R3 incluye un par solitario de electrones o un heteroátomo; M se selecciona de titanio, circonio o hafnio; X se selecciona de restos alifáticos, restos aromáticos, restos NRN2 o restos de haluro, en los que RN se selecciona de restos alquilo, arilo o heteroarilo; y cada línea de puntos define opcionalmente una conexión de puente.
Abstract:
Ethylene-based polymers comprise reaction products of polymerizing ethylene monomer, at least one diene or polyene comonomer, and optionally at least one C3 to C14 comonomer under defined polymerization reaction conditions, the ethylene-based polymer having: an Mw/Mw0 greater than 1.20. The Mw0 is the initial weight-average molecular weight of a comparative ethylene-based polymer by gel permeation chromatography. The comparative ethylene-based polymer being a reaction product of polymerizing ethylene monomer and all C3 to C14 comonomers present in the ethylene-based polymer, if any, without the at least one polyene comonomer, under the defined polymerization reaction conditions; and a molecular weight tail quantified by an MWD area metric, ATAIL, and ATAIL is less than or equal to 0.04 as determined by gel permeation chromatography using a triple detector.
Abstract:
Un complejo de metal-ligando que comprende el compuesto de fosfaguanidina de fórmula I **(Ver fórmula)** donde R1, R5, R6 y R10 incluyen restos iguales o diferentes seleccionados independientemente entre restos de hidruro, alifático, heteroalifático, aromático y heteroaromático; R2, R3, R7 y R8 incluyen los mismos o diferentes restos seleccionados independientemente entre restos alifáticos, restos aromáticos o restos heteroaromáticos; R4 y R9 están seleccionados independientemente entre un par de electrones solitario o un heteroátomo; M está seleccionado entre titanio, circonio o hafnio; cada X está seleccionado independientemente entre restos alifáticos, restos aromáticos, restos NRN 2 o restos haluro, donde RN está seleccionado entre restos alquilo, arilo o heteroarilo; y cada línea discontinua opcionalmente define una conexión de puente.
Abstract:
Las realizaciones se refieren a sistemas catalíticos que comprenden al menos un complejo de ligando metálico y a procesos de polimerización de poliolefinas que incorporan dichos sistemas. Los complejos de ligando metálico tienen las siguientes estructuras: (I). (Traducción automática con Google Translate, sin valor legal)
Abstract:
Processes for polymerizing polyolefins include contacting ethylene and optionally one or more (C3-C12)α-olefin in the presence of a catalyst system, wherein the catalyst system comprises a metal-ligand complex having a structure according to formula (I).