Lg Chem, Ltd

Sooyoung Kwak

Young Hee Lim

Eunhee Kim

Yu Ra Lee

Heon Kim

Yeongrae Chang

Se Hyun Kwon

Yeu Young Youn

Seokhoon Jang

Hye Sung Cho

Hyesung Cho

Yura Lee

Yeon Hwa Lee

Minhwan Jung

The present disclosure relates to a method for analysis of a deuterium substitution rate of a deuterium-substituted sample according to substitution positions using information of aH-NMR spectrum of the deuterium-substituted sample.

Method for determining the deuterium substitution rate according to substitution positions

The present disclosure relates to a method for analysis of an average deuterium substitution rate of a deuterium-substituted sample using information of aH-NMR spectrum of the deuterium-substituted sample.

Method for determining the average deuterium substitution rate

A method for analyzing the structure of an insoluble pigment compound is disclosed. In some embodiments, a method comprise determining a molecular weight of the pigment compound, the insoluble pigment compound by ultrasonic treatment in a solvent to form partial structural compounds, analyzing the elemental composition and the structure of partial structural compounds by liquid chromatography/mass spectrometry and nuclear magnetic resonance, respectively and determining the structure of the insoluble pigment compound from the analysis of the partial structural compounds and the molecular weight of the insoluble pigment compound. In some embodiments, a method comprises determining molecular weight of the pigment compound using matrix assisted laser desorption ionization-time of flight mass spectrometry, selecting a parent mass, fragmenting the parent mass and determining the molecular weight of each fragment, and determining the structure of the insoluble pigment compound from the molecular weight of the insoluble pigment compound and that of the fragments.

Method for qualitatively analyzing insoluble pigment compound

The present disclosure is to provide a photopolymer composition including a polymer matrix or a precursor thereof having a specific chemical structure; a photoreactive monomer; and a photoinitiator. The present disclosure is also to provide a hologram recording medium, an optical element, and a holographic recording method using the photopolymer composition.

Photopolymer composition

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.

Analysis method for polyolefin branches and system using same

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Daejeon, South Korea

Sooyoung Kwak