Lg Chem, Ltd

Lg Energy Solution, Ltd.

Joong Jin Han

Youngjea Kim

Yong Jin Jang

Esder Kang

Hyun Woog Ryu

Eunju Park

Hansol Kim

Sehee Jung

Yunah Yu

Kwonsu Jung

Sanghwan Jo

Chong Kyu Shin

Hyungsam Choi

Seungpyo Jeong

Chul Haeng Lee

Kyoung Ho Ahn

Sol Ji Park

Jeongbin Lee

Young Jea Kim

Minchul Jang

Byoungkuk Son

Sung Ho Lee

Seong Ho Lee

Da Young Sung

Tae Geun Noh

Yu Jin Kim

Yu Mi Kim

Jong Hyun Chae

Sikwon Moon

Daeil Kim

Gi Su Park

Min Seo Kim

Eun Ju Park

Taehyeong Kim

Suhwan Kim

Soyoung Yu

Myong Jo Ham

Hyejin Kwon

YoungSeok Kim

Myeongjin Ha

A method is provided for preparing a low temperature thermosetting polyarylene sulfide having significantly low crystallinity while maintaining a low melt flow rate at a high polymerization yield, so as to ensure excellent laser welding property and mechanical properties even when used in a molded product on the transmitting side of laser beam by a laser welding method.

Preparation method of polyarylene sulfide

There is provided a method and an apparatus for efficiently recovering an amide-based compound such as N-methyl-2-pyrrolidone from an aqueous solution containing an amide-based compound such as N-methyl-2-pyrrolidone.

Method and apparatus for recovering amide-based compound

The present disclosure relates to a method of more efficiently separating and purifying a polyarylene sulfide exhibiting excellent strength, heat resistance, flame retardancy, and processability when processed into a molded product after polymerization.

Separation and purification method of polyarylene sulfide

The present disclosure relates to a method of more efficiently separating and recovering a polyarylene sulfide exhibiting excellent strength, heat resistance, flame retardancy, and processability when processed into a molded product after polymerization.

Separation and recovery method of polyarlene sulfide

A preparation method of a polyarylene sulfide that may produce a polyarylene sulfide having properties equal to or higher than those of the conventional method with a high molecular weight at a high yield by optimizing the content and molar ratio of an amide-based compound in a polymerization step.

The present disclosure relates to a preparation method of a polyarylene sulfide, and this method may produce a polyarylene sulfide having properties equal to or higher than those of the conventional method at a high yield by using a dihalogenated aromatic compound in a predetermined equivalent ratio with respect to a sulfur compound and performing both dehydration and polymerization under optimum conditions.

A method for preparing polyarylene sulfide that can control a viscosity grade thereof by adjusting the molar ratio of water and amide-based compounds present in a polymerization reaction.

Method for preparing polyarylene sulfide

The present invention provides a polyarylene sulfide resin composition comprising a mixture of polyarylene sulfide and a binder resin having excellent electrical conductivity and high temperature stability.

Conductive polyarylene sulfide resin composition

According to the present invention, an alkali metal salt such as NaCl which is a major by-product of polyarylene sulfide polymerization may be recycled in the dehydration reaction for the preparation of a sulfur source, thereby providing a method of preparing a polyarylene sulfide with a high yield in an economical manner.

Method of preparing polyarylene sulfide

There is provided a method for efficiently recovering amide-based compounds such as N-methyl-2-pyrrolidone from a waste liquid containing amide-based compounds such as N-methyl-2-pyrrolidone generated, for example, in a production process of polyarylene sulfide.

Process for recovering amide compounds

The present disclosure relates to a preparation method of a polyarylene sulfide, and this method may produce a polyarylene sulfide having properties equal to or higher than those of the conventional method at a high yield by adding an aliphatic amino acid hydrochloride in addition to existing materials for dehydration.

The present disclosure relates to a preparation method of a polyarylene sulfide, and this method may produce a polyarylene sulfide having properties equal to or higher than those of the conventional method at a high yield by adding an acidic compound in addition to existing materials for dehydration.

The present invention relates to a polymer electrolyte for a secondary battery and a lithium secondary battery comprising the same, and particularly, to a polymer electrolyte for a secondary battery, in which mechanical properties, ionic conductivity, and electrical conductivity are improved by comprising a polymer and an electron-acceptor having at least one double bond, as a dopant, and a lithium secondary battery in which electrochemical stability at high temperature and high voltage is enhanced by comprising the polymer electrolyte.

Polymer electrolyte for secondary battery and lithium secondary battery comprising the same

The present specification relates to a block polymer and a polymer electrolyte membrane including the same, a membrane-electrode assembly including the polymer electrolyte membrane, a fuel cell including the membrane-electrode assembly and a redox flow battery including the polymer electrolyte membrane.

Block polymer and polymer electrolyte membrane comprising same

The present invention relates to a method of preparing a polyphenylene sulfide and a high-viscosity polyphenylene sulfide prepared using the method. In this method, the ratio of an organic phase to an aqueous phase is controlled by controlling dehydration conditions, so that high viscosity may be realized without adversely affecting a reaction or physical properties during preparation of the polyphenylene sulfide.

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Chungju-si, South Korea

Joong Jin Han