Dow Global Technolgoies LLC

Charles Michael Cheatham

Rongjuan Cong

Albert Parrott

Lonnie G Hazlitt

Wallace W Yau

Janet M Goss

Matthew D Miller

Zhe Zhou

Alexander Willem deGroot

Marc A Mangnus

Cherry Hollis

Mark D Alpeter

Marinus G Nieuwenhuize

Al Parrott

Jack M Potter, Jr

Marinus Nieuwenhuize

Jack Potter

Albert Parrot

A packing material for chromatography, the packing material comprising coated particles, wherein the coated particles comprise non-porous particles and a portion of the surface area of the non-porous particles is coated with a coating composition comprising graphene and/or graphene oxide.

Chromatography of polymers using particles coated with graphene-based compositions

A temperature gradient chromatography, and apparatus for the same, said method comprising the following: a) dissolving a composition comprising at least one polymer in at least one solvent, to form a polymer solution; b) injecting at least a portion of the polymer solution onto a support material and wherein the support material has a CI from 0.70 to 1.50; c) cooling the support material at a rate greater than, or equal to, 0.2&#xb0; C./min; d) increasing the temperature of the support material to elute at least some of the polymer; e) generating the chromatogram.

Chromatography of polymers with reduced co-crystallization

The invention provides an apparatus for polymer chromatography, comprising at least one column that comprises a first stationary phase comprising one of the following: A) a material comprising at least one non-carbon atom, excluding glass or a metal, selected from molybdenum sulfide MoS2, tungsten sulfide WS2, silicon carbide SiC, boron nitride BN, or combinations thereof, or B) glass, or a metal, or combinations thereof, and a material comprising at least one non-carbon atom selected from molybdenum sulfide MoS2, tungsten sulfide WS2, silicon carbide SiC, boron nitride BN, or combinations thereof. The invention also provides a method for polymer chromatography, comprising introducing a solution, comprising a polymer, into a liquid flowing through a first stationary phase, and wherein the first stationary phase comprises one of foregoing materials (A) or (B).

Chromatography of polymers

An apparatus and method for determining the standardized melt elasticity (sME) force of a thermoplastic polymer needed to stretch a strand of melted polymer at a speed about thirty three times faster than the speed of strand formation from a body of melted polymer under constant stress from an unencumbered dead weighted piston.

Method and apparatus for determining melt elasticity

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Lake Jackson, TX, United States of America

Charles Michael Cheatham