Abstract: The present disclosure relates to a polyester polymer including: a polymer matrix containing a polyester repeating unit; and a mono-metallic salt of a polyvalent inorganic acid and a multi-metallic salt of a polyvalent inorganic acid that remain in the polymer matrix, a method for preparing the same and a catalyst system.

Abstract: A poly(ether ester) copolymer including a polymer matrix containing a polyether-based repeating unit and a polyester-based repeating unit, and a mono-metallic salt of an inorganic acid and a multi-metallic salt of an inorganic acid that remain in the polymer matrix, and a method for preparing the same.

Abstract: Provided is a polylactide resin composition that is used in combination with a specific nucleating agent, wherein the composition is excellent in crystallization half-life and crystallinity degree, and thus can maintain the properties inherent in the polylactide resin while having excellent processability.

Abstract: Provided are a polyethylene having excellent processability and capable of reducing an injection molding defect rate, and a method of preparing the same. The polyethylene has an integral value in the region where the Log Mw is 5.5 or more in a GPC curve, wherein the x-axis is log Mw and the y-axis is dw/dlogMw, of 9% or less of the total integral value: and has a ratio (Tc10/Tc40) of a crystallization temperature (Tc10) measured at a cooling rate of 10° C./min to a crystallization temperature (Tc40) measured at a cooling rate of 40° C./min of less than 1.04.

Abstract: The present disclosure relates to a negative electrode for a secondary battery that is improved in the peeling resistance and adhesiveness of the active material layer and thus can improve the life characteristics of the negative electrode and the lithium secondary battery, a method of manufacturing the same and a lithium secondary battery including same. The negative electrode for a secondary battery includes a metal current collector; and an active material layer formed on the metal current collector and containing a negative electrode active material, a binder, and a conductive material, wherein the active material layer has an average value of shear strength of 1.6 MPa or more as measured at a predetermined depth.