Abstract: A modified conjugated diene-based polymer having high linearity and improved compounding properties is provided. The modified conjugated diene-based polymer includes phosphor, sulfur and chlorine in specific amount ranges, and the degree of branching is controlled, and accordingly, if applied to a rubber composition, tensile strength and viscoelasticity may be excellent, and processability may be markedly improved.

Abstract: The present invention relates to a method of controlling a flexible thermoelectric element to provide dynamic thermal therapy, and to a dynamic thermal therapy device, wherein the flexible thermoelectric element has a plurality of thermoelectric modules, each corresponding to a plurality of regions arranged sequentially, wherein the plurality of thermoelectric modules can selectively perform either exothermic or endothermic operation on the plurality of regions by control of a current.

Abstract: Provided are: a plant cell, in which expression or activity of a phytochelatin synthase (PCS) gene or a protein encoded by the PCS gene is reduced as compared with a parent cell; a plant having that has reduced heavy metal absorption, and includes the plant cell; a method of reducing heavy metals in a plant, the method including reducing expression or activity of a PCS gene or a protein encoded by the PCS gene, as compared with a parent cell; a CRISPR-Cas9 recombinant vector including a single guide RNA targeting a PCS gene; and a method of preparing a plant with reduced heavy metals, the method including transforming a plant cell with the recombinant vector.

Abstract: A catalyst composition capable of forming a conjugated diene-based polymer having a narrow molecular weight distribution by being used in polymerization of a conjugated diene-based monomer, a method of preparing the same, a method of preparing a conjugated diene-based polymer using the catalyst composition, and a conjugated diene-based polymer prepared by the method of preparing the polymer are provided. Since the catalyst composition according to the present invention includes a polymer having a number-average molecular weight of 3,000 g/mol to 10,000 g/mol and including a conjugated diene-based monomer-derived unit, the catalyst composition may be used in the polymerization of a conjugated diene-based monomer to prepare a conjugated diene-based polymer having a narrower molecular weight distribution in comparison to a conventional neodymium catalyst composition.

Abstract: The present invention relates to a rubber composition having excellent tensile properties and viscoelasticity properties and including a conjugated diene-based polymer. The rubber composition may include a modified conjugated diene-based polymer which is selected considering target tensile properties and viscoelasticity properties, by predicting in advance the correlation between the modification ratio of the modified conjugated diene-based polymer and the dynamic viscoelasticity loss coefficient at 60° C. of the rubber composition through Mathematical Formula 1 and Mathematical Formula 2. Therefore, excellent compounding properties may be shown.

Abstract: A method for preparing a catalyst for use in polymerizing a conjugated diene-based monomer, the catalyst, and a method for preparing a conjugated diene-based polymer using the same are disclosed herein. In an embodiment, a method of preparing a catalyst comprises mixing a lanthanide rare earth element-containing compound, an alkylating agent compound and a halogen compound in the presence of a solvent to prepare a catalyst composition, adding a conjugated diene-based monomer to the catalyst composition to form a preformed catalyst composition, and aging the preformed catalyst composition at a temperature of ?1° C. to ?15° C. for 3 hours to 98 hours to prepare the catalyst. The catalyst has excellent catalyst activity and polymerization reactivity and is useful for preparing a conjugated diene-based polymer which has an excellent modification ratio and improved compounding properties.

Abstract: The present invention relates to an oil-extended conjugated diene-based polymer or an oil-extended modified conjugated diene-based polymer, which has excellent wet skid resistance and abrasion resistance in a balanced way, and a rubber composition including the same, and by controlling the microstructure of the polymer such that a full width at half maximum (FWHM) value of a tan ? peak shown in a temperature range of -100° C. to 100° C. becomes 20° C. or higher in a tan ? graph in accordance with temperature, derived from dynamic viscoelasticity analysis by an Advanced Rheometric Expansion System (ARES), and by including a vegetable oil in a polymer, excellent viscoelasticity behavior properties may be shown, and accordingly, the improvement of overall physical properties may be expected.

Abstract: The present invention relates to an oil-extended modified conjugated diene-based polymer having excellent tensile properties and abrasion resistance, a method for preparing same and a rubber composition including same, and provides an oil-extended modified conjugated diene-based polymer including a modified polymer chain including a repeating unit derived from a conjugated diene-based monomer and a functional group derived from an aminoalkoxysilane-based modifier; and a derived unit from a vegetable oil, wherein at least one of the modified polymer chain is coupled with the derived unit from vegetable oil, N and Si atoms are included in 100 ppm or more each based on a total weight of the polymer, two glass transition temperatures of Tg1 and Tg2 measured by differential scanning calorimetry (DSC) are shown, Tg1 is ?80° C. to ?20° C., Tg2 is ?50° C. to 30° C., and Tg2 is higher than Tg1, a method for preparing same and a rubber composition including same.

Abstract: The present invention relates to a rubber composition having excellent tensile properties and viscoelasticity properties and including a modified conjugated diene-based polymer. The rubber composition may include a modified conjugated diene-based polymer which is selected considering target tensile properties and viscoelasticity properties, by predicting in advance the correlation of the modification ratio of the modified conjugated diene-based polymer and the dynamic viscoelasticity loss coefficient at 60° C. of the rubber composition through Mathematical Formula 1 and Mathematical Formula 2. Therefore, excellent compounding properties may be shown.

Abstract: The present invention relates to a method for preparing a modified conjugated diene-based polymer having excellent physical properties such as tensile properties and viscoelasticity properties with a high modification ratio.

Abstract: The present invention relates to a modified conjugated diene-based polymer having excellent processability and good tensile strength and viscoelasticity, and a rubber composition including the same, and provides a modified conjugated diene-based polymer including a first chain including a repeating unit derived from a conjugated diene-based monomer; a second chain including a repeating unit derived from a compound represented by Formula 1; and a derived unit from an alkoxysilane-based modifier, wherein the first chain and the second chain are coupled by the derived unit from the modifier.

Abstract: The present invention provides a modifier, a modified and conjugated diene-based polymer which is modified using the same, and a rubber composition including the modified and conjugated diene-based polymer, and more particularly, a modifier which includes a compound represented by Formula 1 and is capable of improving the mixing properties between a conjugated diene-based polymer and a filler, a modified and conjugated diene-based polymer which is modified using the same, and a rubber composition including the modified and conjugated diene-based polymer.

Abstract: A modified conjugated diene-based polymer, a method of making the same, and a rubber composition including the same are disclosed herein. The modified conjugated diene-based polymer has excellent processability and good tensile strength and viscoelasticity. In some embodiments, a modified conjugated diene-based polymer includes a first chain including a repeating unit derived from a conjugated diene-based monomer, a second chain including a repeating unit derived from a compound represented by Formula 1 or Formula 2, and a derived unit from an alkoxysilane-based modifier, wherein the first chain and the second chain are coupled by the derived unit from the modifier.

Abstract: A modified conjugated diene-based polymer having high linearity and improved compounding properties is provided. The modified conjugated diene-based polymer includes phosphor, sulfur and chlorine in specific amount ranges, and the degree of branching is controlled, and accordingly, if applied to a rubber composition, tensile strength and viscoelasticity may be excellent, and processability may be markedly improved.

Abstract: A method for preparing a modified conjugated diene-based polymer having excellent compounding properties and improved processability is disclosed herein. According to the method, a first polymer including a functional group is prepared using a modifier represented by Formula 1, and the first polymer is mixed with a sulfur halide. A modified conjugated diene-based polymer having excellent affinity with a filler, excellent compounding properties such as tensile properties and viscoelasticity properties, and excellent compounding processability, may be prepared.

Abstract: A catalyst composition capable of forming a conjugated diene-based polymer having a narrow molecular weight distribution by being used in polymerization of a conjugated diene-based monomer, a method of preparing the same, a method of preparing a conjugated diene-based polymer using the catalyst composition, and a conjugated diene-based polymer prepared by the method of preparing the polymer are provided. Since the catalyst composition according to the present invention includes a polymer having a number-average molecular weight of 3,000 g/mol to 10,000 g/mol and including a conjugated diene-based monomer-derived unit, the catalyst composition may be used in the polymerization of a conjugated diene-based monomer to prepare a conjugated diene-based polymer having a narrower molecular weight distribution in comparison to a conventional neodymium catalyst composition.

Abstract: A method for preparing a catalyst for use in polymerizing a conjugated diene-based monomer, the catalyst, and a method for preparing a conjugated diene-based polymer using the same are disclosed herein. In an embodiment, a method of preparing a catalyst comprises mixing a lanthanide rare earth element-containing compound, an alkylating agent compound and a halogen compound in the presence of a solvent to prepare a catalyst composition, adding a conjugated diene-based monomer to the catalyst composition to form a preformed catalyst composition, and aging the preformed catalyst composition at a temperature of ?1° C. to ?15° C. for 3 hours to 98 hours to prepare the catalyst. The catalyst has excellent catalyst activity and polymerization reactivity and is useful for preparing a conjugated diene-based polymer which has an excellent modification ratio and improved compounding properties.

Abstract: The present invention provides a modifier, a modified conjugated diene-based polymer which is modified using the same, and a rubber composition including the modified conjugated diene-based polymer, and more particularly, a modifier which includes a compound represented by Formula 1 and is capable of improving the mixing properties between a conjugated diene-based polymer and a filler, a modified conjugated diene-based polymer which is modified using the same, and a rubber composition including the modified conjugated diene-based polymer.

Abstract: The present invention relates to a rubber composition having excellent tensile properties and viscoelasticity properties and including a modified conjugated diene-based polymer. The rubber composition may include a modified conjugated diene-based polymer which is selected considering target tensile properties and viscoelasticity properties, by predicting in advance the correlation of the modification ratio of the modified conjugated diene-based polymer and the dynamic viscoelasticity loss coefficient at 60° C. of the rubber composition through Mathematical Formula 1 and Mathematical Formula 2. Therefore, excellent compounding properties may be shown.

Abstract: The present invention provides a catalyst composition including a functionalizing agent of the following Formula 1 together with a rare earth metal compound, an alkylating agent, and a halogen compound, having good catalytic activity and polymerization reactivity and useful for the preparation of a conjugated diene-based polymer having high linearity and excellent processability, and a conjugated diene-based polymer prepared using the catalyst composition. (X1)a—N—(X2)3-a??[Formula 1] In Formula 1, a, X1, and X2 are the same as defined in the disclosure.