Integrated on-line two-dimensional method and device for synchroned analytical temperature rising elution fractionation and gel permeation chromatography
AssigneeChevron Phillips Chemical Company LP
InventorsYoulu Yu, Chung C. Tso, Paul J. DesLauriers
Life of this patent
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Abstract
An analytical method comprising performing a first fractionation of a polymer sample based on differences in crystallizability to provide a first set of sample fractions, performing a first analysis on the first set of sample fractions, performing a second fractionation of the first set of sample fractions to produce a second set of sample fractions, performing a second analysis on the second set of sample fractions, and synchronizing the first fractionation and second fractionation to provide about concurrent analysis of the polymer sample.
Claims26
An analytical method comprising:
- (a) performing, in a first device, a first fractionation of a polymer sample based on differences in crystallizability to provide a first sample fraction wherein the first fractionation is temperature rising elution fractionation;
- (b) splitting the first sample fraction into a first portion and a second portion;
- (c) performing a first analysis on the first portion of the first sample fraction;
- (d) conveying the second portion of the first sample fraction from the first device to a second device;
- (e) performing, in the second device, a second fractionation of the second portion of the first sample fraction to produce a second sample fraction wherein the second fractionation is rapid gel permeation chromatography;
- and
- (f) performing a second analysis on the second sample fraction.
A device for characterizing a polymer sample comprising:
- a first column for fractionating the polymer sample based on differences in crystallizability to obtain a first sample fraction;
- a first detection device in fluid communication with the first column and receiving a first portion of the first sample fraction;
- a second column in fluid communication with the first column and receiving a second portion of the first sample fraction from the first column, wherein the second portion of the first sample fraction is fractionated to produce a second sample fraction, wherein the second column comprises a rapid gel permeation chromatography column;
- and
- a second detection device in fluid communication with the second column and receiving at least a portion of the second sample fraction.
An analytical method comprising:
- introducing a sample to an analytical device having an analytical temperature rising elution fractionation element and a rapid gel permeation chromatography element;
- eluting a sample fraction with the analytical temperature rising elution fractionation element;
- conveying a first portion of the sample fraction from the analytical temperature rising elution fractionation element to a detector;
- conveying a second portion of the sample fraction from the analytical temperature rising elution fractionation element to the rapid gel permeation chromatography element;
- determining the composition of the first portion in the detector;
- and
- determining the molecular weight and/or molecular weight distribution of the second portion.
Dependencies are inferred from the claim text.