Sk Innovation Co., Ltd.

Sk Global Chemical Co., Ltd.

SungJae Na

Myungahn Ok

Jisu Jeong

Sujith Sudevan

Kwangjin Chung

Bunyeoul Lee

Anish Cyriac

Yonggyu Han

SangHwan Lee

Bun Yeoul Lee

Jieun Yoo

Dong-Won Kim

Kodiyan Varghese Jobi

YeonJeong Choi

YoungGyu Han

Young Gyu Han

There is provided a method for preparing a low-molecular weight poly(alkylene carbonate) of which the molecular weight and chain shape are precisely controlled, by introducing a phosphorous compound having a hydroxyl group as a chain transfer agent in order to regulate the molecular weight, in alternating copolymerizing an epoxide compound and carbon dioxide by using trivalent metal complex prepared from a Salen type ligand containing a quaternary ammonium salt, and a polymer prepared by the method. Since poly(alkylene carbonate) prepared according to the present invention includes a phosphate or phosphonate group in the polymer chain, it has flame-retarding property.

Flame-retarding carbon dioxide/epoxide copolymer and method for preparing the same

This invention relates to a method of preparing poly(alkylene carbonate) that has a molecular weight and polymer chain structure precisely controlled by adding a chain transfer agent composed of a compound having an alcohol or carboxylic acid functional group upon alternating copolymerization of an epoxide compound and carbon dioxide using a catalyst composed of a trivalent metal complex compound synthesized from a quaternary ammonium salt-containing Salen type ligand, and to a polymer compound prepared thereby. According to this invention, the polymer compound having a star-shaped chain as well as the polymer having a linear chain can be prepared. The low-molecular-weight poly(alkylene carbonate) has an &#x2014;OH terminal group and can be used alone as a coating agent, etc., and also in mixtures with an isocyanate compound and thus can be easily utilized to prepare polyurethane.

Precise control of molecular weight and chain shape control in carbon dioxide/epoxide alternating copolymerization and preparation of low molecular weight poly(alkylene carbonate) thereby

The present invention related to a method of manufacturing a polycarbonate including the process of copolymerizing epoxide compound and CO2 using cobalt(III) or chromium(III), where the ligands contains at least 3 ammonium cations, central metal has formal &#x2212;1 charge, and conjugated anions of the two cationic ammonium groups are acid-base homoconjugation, as catalyst. According to the present invention, the initial induction time can be reduced when the said polycarbonate is manufactured and it is possible to improve the activity of the catalyst and the molecular weight of the obtained polymer.

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Disclosed is a polymer electrolyte composition, a gel-type polymer electrolyte obtained by mixing the same at normal temperature, and a dye-sensitized solar cell containing the electrolyte. Since the poly(alkylene carbonate)-based polymer is included, a crosslinking process by radiation of heat or UV is not required when the polymer electrolyte is manufactured, such that a manufacturing process is simple. Accordingly, the polymer electrolyte is useful for mass production of a solar cell and maintained in a uniform state without a phase separation between two components due to excellent affinity between the polymer and the organic solvent included in the electrolyte, and has excellent electrode-electrolyte interface property in the solar cell due to an adhesive property of the gelled polymer electrolyte.

Polymer electrolyte composition and dye-sensitized solar cell containing the same

Provided is a method for preparing poly(alkylene carbonate) containing ether linkages, by the copolymerization of an epoxy compound and carbon dioxide, with a trivalent metal complex prepared from a salen type ligand containing a quaternary ammonium salt, and a double metal cyanide (DMC) catalyst together. The amount of ether linkages can be controlled by regulating the weight ratio of two catalysts and the carbon dioxide pressure.

Method for preparing carbon dioxide/epoxide copolymers containing ether linkages

Provided is preparation of poly(alkylene carbonate) by alternating copolymerization of carbon dioxide and epoxide. To be specific, provided are a method for preparing block or graft copolymers of the polymer compound and poly(alkylene carbonate) by alternating-copolymerization of an epoxide compound and carbon dioxide by using a metal (III) compound prepared from salen-type ligand with a quaternary ammonium salt as a catalyst in the presence of a polymer compound having a functional group of hydroxyl or carboxylic acid, and block or graft copolymers prepared by the method.

Block and graft copolymers of poly(alkylene carbonate) and various polymers

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Daejeon, South Korea

SungJae Na