Korea Institute of Science and Technology

Korea Research Institute of Chemical Technology

Hyeon Yeol Jeon

Seung Sang Hwang

Soon Man Hong

Kyung Youl Baek

Chong Min Koo

Jong Geon Jegal

Hyun Ji Kim

Dong Yeop Oh

Sung Yeon Hwang

Tae Ho Kim

Min Jae Ko

Yun Jae Lee

Je Young Park

Jeyoung Park

Kie Yong Cho

Seon Mi Kim

Seon-ja Song

A polybutylene succinate (PBS) nanocomposite material includes a matrix comprising polybutylene succinate chains, and nanocelluloses dispersed between the polybutylene succinate chains. The PBS composite material may be produced by polymerizing 1,4-butanediol and succinic acid or a derivative thereof in a mixture of 1,4-butanediol and succinic acid or a derivative thereof with nanocelluloses. The PBS nanocomposite material and the method have improved properties, which does not require a surface hydrophobization pretreatment process of cellulose, melt kneading, and solution mixing processes.

PBS composite material and method for producing same

A self-restoring polyurethane-based polymer obtained by polymerization of a composition containing an aromatic disulfide diol represented by Chemical Formula, HO&#x2014;Ar&#x2014;S&#x2014;S&#x2014;Ar&#x2014;OH, an alicyclic polyisocyanate, and a polyol. Arand Areach are independently a substituted or unsubstituted C-Carylene group. The composition satisfies Equation, 0.1&#x2264;M/M. Mis a total mole number of the aromatic disulfide diol in the composition, and Mis a total mole number of the aromatic disulfide diol and the polyol in the composition.

Self-restoring polyurethane-based polymer and preparation method therefor

The present invention provides a method for producing polythiophene star copolymer capable of being self-doped by an external stimulus, which includes the steps of: forming a polythiophene macroinitiator made by introducing a living radical polymerizable functional group into an end of polythiophene or a derivative thereof; forming through living radical polymerization a polymer macroinitiator for providing by an external stimulus at least a dopant selected from the group consisting of sulfonic acid radical, carboxylic acid radical and phosphoric acid radical; and polymerizing the polythiophene macroinitiator added with the polymer macroinitiator and at least one kind of divinyl monomer to produce the polythiophene star copolymer. The polythiophene star copolymer capable of being self-doped by an external stimulus according to the present invention is a self-doped material to stably increase conductivity, and can be used as a material for a conductive film.

Polythiophene star copolymer capable of being self-doped by external stimulus, a method for producing the same, a conductive thin film using the same, and a method for producing the conductive thin film

Provided are a CNT-polymer complex and a process for preparing the same. The CNT-polymer complex includes carbon nanotubes (CNT) coated with a block copolymer of a conjugated polymer and a non-conjugated polymer, wherein the non-conjugated polymer comprises at least one monomer selected from the group consisting of styrene, butadiene, isoprene, methacryl, acryl, acryl amide, methacryl amide, acrylonitrile, vinyl acetate, vinyl pyridine and vinyl pyrrolidone in which at least one selected from the group consisting of a sulfone group, carboxyl group, acryl group and phosphate group is protected with a protective group, and provides at least one dopant selected from the group consisting of a sulfone group, carboxyl group, acryl group and phosphate group by external stimuli so that self-doping is allowed; and the complex is soluble to an organic solvent in a neutral state but is insoluble to any solvent after subjecting it to external stimuli.

CNT-polymer complex capable of self-doping by external stimuli and process for preparing the same

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Busan, South Korea

Hyeon Yeol Jeon