Abstract: A supported metallocene catalyst includes a carrier and a metallocene component. The carrier includes an inorganic oxide particle and an alkyl aluminoxane material. The inorganic oxide particle includes at least one inorganic oxide compound selected from the group consisting of an oxide of Group 3A and an oxide of Group 4A. The alkyl aluminoxane material includes an alkyl aluminoxane compound and an alkyl aluminum compound that is present in amount ranging from greater than 0.01 wt % to less than 14 wt % base on 100 wt % of the alkyl aluminoxane material. The metallocene component is supported on the carrier, and includes one of a metallocene compound containing a metal from Group 3B, a metallocene compound containing a metal from Group 4B, and a combination thereof. A method for preparing the supported metallocene catalyst and a method for preparing polyolefin using the supported metallocene catalyst are also disclosed.

Abstract: A thermoplastic vulcanizate and a method for preparing the same are provided. The thermoplastic vulcanizate includes a thermoplastic, a cross-linked rubber particle, and a compatibilizer, wherein the cross-linked rubber particle is dispersed in the thermoplastic serving as a continuous phase, wherein the cross-linked rubber particle is a product of a composition via a cross-linking reaction. The composition includes an ethylene copolymer and a cross-linking agent, wherein the weight ratio of the thermoplastic to the ethylene copolymer is 3:17 to 1:1.

Abstract: A thermoplastic and thermoset foam nucleation additive, which is added to a foamed material, includes a gas absorbent and a nano-compound, wherein the nano-compound and the gas absorbent are mixed to form the thermoplastic and thermoset foam nucleation additive. The gas absorbent includes a central structure and a short chain structure, wherein a first chemical bond is formed between the short chain structure and the central structure. The nano-compound includes a base structure and a long chain structure, wherein a second chemical bond is formed between the long chain structure and the base structure. A number of carbon atoms in the short chain structure is not less than 8, and a molecular weight of the long chain structure is higher than 10000 g/mole.