Abstract: The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. By comprising the compound according to the present disclosure, it is possible to produce an organic electroluminescent device having improved driving voltage, power efficiency, and/or lifetime properties compared to the conventional organic electroluminescent devices.

Abstract: A method for preparing a pitch for carbon fibers and a pitch for carbon fibers prepared by the same are disclosed. The method includes introducing a peroxide compound and ozone into a petroleum-process residual oil, followed by heat treatment for reaction. By the method, the pitch for carbon fibers, which exhibits excellent oxidative stabilization and oxidative incompatibility while having a high softening point and high strength, can be obtained at high yield at a relatively low temperature.

Abstract: A method for preparing a pitch for carbon fibers and a pitch for carbon fibers prepared by the same are disclosed. The method includes introducing a peroxide compound and ozone into a petroleum-process residual oil, followed by heat treatment for reaction. By the method, the pitch for carbon fibers, which exhibits excellent oxidative stabilization and oxidative incompatibility while having a high softening point and high strength, can be obtained at high yield at a relatively low temperature.

Abstract: Disclosed herein is a method of preparing an isotropic pitch for carbon fiber having a high softening point, and more particularly, a method of preparing an isotropic pitch for carbon fiber by mixing petroleum residues with C9 fraction to form a mixture and then heating the mixture to perform heat polymerization. With the method of preparing an isotropic pitch according to the present invention, a separate catalyst is not required, and the isotropic pitch for carbon fiber having a low softening point may be prepared with a high yield even at a relatively low temperature.

Abstract: The present invention provides cellulose-based fibers including cellulose and at least one polymer selected from the group consisting of a polysiloxane, a polyacrylic acid, a polyacrylamide, an m-aramid, and a polyvinylalcohol/polystyrene copolymer, and a tire cord including the same. Furthermore, the cellulose-based fibers of the present invention have an advantage in superior elongation and tenacity of the prior cellulose fibers by blending at least one polymer having a functional group that is capable of a hydrogen bond with a hydroxyl group of a cellulose molecule.

Abstract: Disclosed are a cellulose-based filament for a tire cord, a bundle including the same, a twisted yarn including the same, and a tire cord including the same. The cellulose-based filament is suitable for use in a tire cord has advantages in that strength deterioration due to twisting is remarkably low and elongation is improved, and thus the fatigue resistance is good.

Abstract: The present invention relates to a novel polymer, an adhesive composition including the same, and a rubber reinforcing material treated with the same, and more particularly to an organic polysiloxane including a certain repeating unit, an adhesive composition including the same, and a rubber reinforcing material treated with the same. Because the organic polysiloxane and the adhesive composition including the same is superior in reactivity to a hydroxyl group, an amide group, or an amine group, and has high thermal resistance and low stiffness, the composition is preferably used for surface-treating a rubber reinforcing material such as a tire cord and make it possible to provide a rubber reinforcing material such as a tire cord having good properties.

Abstract: The present invention is relates to lyocell filament fibers having fatigue resistance and durability, of which the dimensional stability at high temperature and the high speed driving performance are good, and a tire cord prepared therefrom.

Abstract: Disclosed are a lyocell filament fiber and a cellulose-based tire cord. The lyocell filament fibers and the cellulose based tire cord have good dimensional stability in a highly humid state and thus the tenacity, the elongation, and the modulus are superior to common cellulose based fibers, such as rayon and so on. Their property maintaining rate at the post manufacturing process is high and the processibility is good.

Abstract: The present invention provides cellulose-based fibers including cellulose and at least one polymer selected from the group consisting of a polysiloxane, a polyacrylic acid, a polyacrylamide, an m-aramid, and a poly vinylalcohol/polystyrene copolymer, and a tire cord including the same. Furthermore, the cellulose-based fibers of the present invention have an advantage in superior elongation and tenacity of the prior cellulose fibers by blending at least one polymer having a functional group that is capable of a hydrogen bond with a hydroxyl group of a cellulose molecule.

Abstract: The present invention relates to a lyocell fiber having superior the crystalline properties, which are measured by wet-treated and dry-treated condition under high temperature and high pressure conditions compared to measurement under standard conditions, and to a tire cord comprising the lyocell fiber. According to the present invention, the lyocell fiber has strength, elongation, and modulus that are superior to those of a conventional rayon, even when the lyocell fiber is wet- and dry-treated under high temperature and high pressure conditions by specifying water-washing conditions of a spinning machine, thereby improving dimensional stability of a tire cord when it is applied to the tire cord.

Abstract: Disclosed are a cellulose-based filament for a tire cord, a bundle including the same, a twisted yarn including the same, and a tire cord including the same. The cellulose-based filament is suitable for use in a tire cord has advantages in that strength deterioration due to twisting is remarkably low and elongation is improved, and thus the fatigue resistance is good.

Abstract: The present invention relates to a novel polymer, an adhesive composition including the same, and a rubber reinforcing material treated with the same, and more particularly to an organic polysiloxane including a certain repeating unit, an adhesive composition including the same, and a rubber reinforcing material treated with the same. Because the organic polysiloxane and the adhesive composition including the same is superior in reactivity to a hydroxyl group, an amide group, or an amine group, and has high thermal resistance and low stiffness, the composition is preferably used for surface-treating a rubber reinforcing material such as a tire cord and make it possible to provide a rubber reinforcing material such as a tire cord having good properties.

Abstract: A simple method of preparing a homogeneous cellulose solution is disclosed, which comprises the steps of (a) preparing fibrillar cellulose powder; (b) injecting a molten liquid tertiary amine oxide solvent into a twin screw extruder; (c) feeding the cellulose powder of step (a) into a section of the twin screw extruder where the molten liquid tertiary amine oxide solvent fed in step (b) produces a well swollen paste with the cellulose powder fed in step (c); (d) dissolving the well swollen cellulose paste in the following melting sections in the twin screw extruder; and (e) stabilizing the solution obtained in step (d) in a storage tank.