Hanwha Chemical Corporation

Hanwha Solutions Corporation

Postech Academy-industry Foundation

Ceko Co., Ltd.

Dankook University Cheonan Campus Industry Academic

Kyung Ho Kwon

Jin Seo Lee

Seung Hoe Do

Do Kyoung Kim

Kyoung Won Yim

Hye Yeon Lee

Dae Hak Kim

Kwan Young Han

Jeong Rae Kim

Hong Chul Kim

Hyun Joong Kim

Byung Min Park

Moon Hor Ree

Won Yeong Ryu

Dong Hoon Jang

Sung Kyoo Lim

Provided is a method for preparing a polyamide by an anionic polymerization reaction, wherein lactam, and based on 100 parts by weight of the entire lactam, 0.01 parts by weight to 20 parts by weight of an alkali metal as an initiator, 0.3 parts by weight to 10 parts by weight of a molecular weight controller, and 0.002 parts by weight to 1.0 part by weight of carbon dioxide as an activator may be included.

Method for preparing polyamide by anion ring-opening polymerization and polyamide prepared thereby

Provided are a method for producing a polyamide including an amide-based molecular weight controller and a polyamide produced thereby, wherein the amide-based molecular weight controller may easily control the molecular weight of the polyamide to have a narrow molecular weight distribution so as to prevent an increase in the molecular weight due to a basic intermediate produced in anionic polymerization and a side reaction generated under a high-temperature polymerization condition.

Method for producing polyamide comprising amide-based molecular weight modifier, and polyamide produced thereby

The present invention provides a method for producing a polyamide with controlled activator addition, and a polyamide produced thereby, the method allowing a polymerization conversion rate and a polydispersity index (PDI) to be enhanced by controlling the addition of an activator so as to prevent a gelation phenomenon that occurs during anionic polymerization.

Method for producing polyamide with controlled activator addition, and polyamide produced thereby

The present invention relates to a method for producing a polyamide by coordinated anionic ring-opening polymerization and a polyamide produced thereby, wherein metal alkoxide as an initiator and metal hydride as a catalyst are added to enable polymerization having a narrow molecular weight distribution and uniform molecular weight within a short polymerization reaction time at a low temperature, without a separate vacuum process, as compared with an existing polymerization method.

Method for producing polyamide by coordinated anionic ring-opening polymerization, and polyamide produced thereby

The present invention relates to a lightweight sandwich steel sheet using polyamide, and more particularly, to a lightweight sandwich steel sheet using polyamide and a manufacturing method therefor, the steel sheet being usable at a wider temperature range than that of a conventional sandwich steel sheet and, particularly, having excellent adhesion at a low temperature and remarkably increasing stability and lightweight property.

Lightweight sandwich steel sheet using polyamide, and manufacturing method therefor

The present invention relates to a polyvinyl-based compound, which maximizes self-healing ability by introducing various functional molecules into a brush of a polyvinyl-based resin, a preparation method thereof, and a polymer coating film produced therefrom.

Self-healing functional polyvinvyl-based compound and preparation method thereof

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Daegu, South Korea

Kyung Ho Kwon