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US 10,241,065 B2Granted
Analysis method for polyolefin branches and system using same
AssigneeLG Chem, Ltd.
InventorsMinhwan Jung, Hyesung Cho, Yura Lee, Sooyoung Kwak
Life of this patent
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Abstract
This invention relates to a method of analyzing polyolefin branches and a system using the same, the method including: a) obtaining a spectrum for a sample including polyolefin having a plurality of branches using a nuclear magnetic resonance (NMR) spectrometer and a pulse program, wherein peaks of the branches are separated from each other in the spectrum; and b) calculating the proportion of each of the branches using the separated peaks.
Claims12
A method of analyzing polyolefin branches, comprising:
- a) obtaining a spectrum for a sample including polyolefin having a plurality of branches using a nuclear magnetic resonance (NMR) spectrometer and a pulse program, wherein peaks of the branches are separated from each other in the spectrum;
- and
- b) calculating a proportion of each of the branches relative to the total number of all branches contained in polyolefin using the separated peaks,
- wherein when the polyolefin has two or more of C4, C5, and C6 branches respectively from hexene, heptene and octene comonomers, and when the two or more branches are different from each other, a coupling spectrum portion of the branches is subjected to homo-decoupling using a homo-decoupling pulse program in step a), so that peaks of the branches are separated from each other,
- wherein when the polyolefin has C1 and C2 branches respectively from propylene and butene comonomers, a two-dimensional (2D) spectrum is obtained through a 2D 1H-13C heteronuclear correlation method using a pulse program in step a), and then peaks of the branches are separated from each other.
2 more elements
A system for analyzing polyolefin branches, comprising:
- a) a peak separation module for obtaining a spectrum for a sample including polyolefin having a plurality of branches using an NMR spectrometer and a pulse program, wherein peaks of the branches are separated from each other in the spectrum;
- and
- b) a calculation module for calculating a proportion of each of the branches relative to the total number of all branches contained in polyolefin using the separated peaks,
- wherein when the polyolefin has two or more of C4, C5, and C6 branches respectively from hexene, heptene and octene comonomers, and when the two or more branches are different from each other, the peak separation module of a) operates in a manner such that a coupling spectrum portion of the branches is subjected to homo-decoupling using a homo-decoupling pulse program, such that separating peaks of the branches from each other, and
- wherein when the polyolefin has C1 and C2 branches respectively from propylene and butene comonomers, the peak separation module of a) operates in a manner such that a 2D spectrum is obtained through a 2D 1H-13C heteronuclear correlation method using a pulse program, and then peaks of the branches are separated from each other.
2 more elements
Dependencies are inferred from the claim text.