Embodiments are directed to catalyst systems comprising: a procatalyst; and a co-catalyst dissolved in a non-halogenated aprotic hydrocarbon solvent, the co-catalyst comprising: a non-coordinating borate dianion having the formula: (III) and two cations, each cation being independently chosen from a cation according to formula (I) or formula (II).

The present disclosure relates to a process for preparation of disentangled ultra-high molecular weight isotactic polypropylene. The disentangled ultra-high molecular weight isotactic polypropylene of the present disclosure has a low entanglement density, a low bulk density and a sphere like morphology. Further, the disentangled ultra-high molecular weight isotactic polypropylene of the present disclosure does not need costly and energy consuming post-production treatment for reducing the entanglement density.

The present disclosure relates to a process for preparation of disentangled ultra-high molecular weight isotactic polypropylene. The disentangled ultra-high molecular weight isotactic polypropylene of the present disclosure has a low entanglement density, a low bulk density and a sphere like morphology. Further, the disentangled ultra-high molecular weight isotactic polypropylene of the present disclosure does not need costly and energy consuming post-production treatment for reducing the entanglement density.

Heterocyclic amido transition metal complexes are disclosed for use in alkene polymerization to produce polyolefins, preferably multimodal polyolefins. The heterocyclic amido transition metal complexes are formed by the chelation of a tridentate dianionic heterocyclic amido ligand to a group 3, 4, or 5 transition metal, where the tridentate ligand coordinates to the metal forming a five-membered ring and an eight-membered ring.

The present invention relates to a catalyst composition including a transition metal compound represented by the following Formula 1; and one or more of a compound represented by the following Formula 2, a compound represented by the following Formula 3 and a compound represented by the following Formula 4. The catalyst composition according to the present invention has excellent copolymerization properties, and can be usefully used as a catalyst for a polymerization reaction for preparing an olefin-based polymer having a high molecular weight.

The present invention relates to a catalyst composition including a transition metal compound represented by the following Formula 1; and one or more of a compound represented by the following Formula 2, a compound represented by the following Formula 3 and a compound represented by the following Formula 4. The catalyst composition according to the present invention has excellent copolymerization properties, and can be usefully used as a catalyst for a polymerization reaction for preparing an olefin-based polymer having a high molecular weight.

A multiblock copolymer having a structure in which polystyrene chains are attached to both terminals of a polyolefin chain, a resin composition comprising same, and methods for preparing them are described herein.

A multiblock copolymer having a structure in which polystyrene chains are attached to both terminals of a polyolefin chain, a resin composition comprising same, and methods for preparing them are described herein.

A polyolefin-polystyrene multi-block copolymer and a method of producing the same is disclosed herein. In some embodiments, the polyolefin-polystyrene multi-block copolymer has a first complex viscosity of 40,000 Pa.Math.s to 350,000 Pa.Math.s at a temperature of 160 C. and a first frequency of 0.5 rad/s, and has a second complex viscosity of 900 Pa.Math.s to 3,500 Pa.Math.s at a temperature of 160 C. and a second frequency of 125 rad/s. The polyolefin-polystyrene multi-block copolymer has a structure in which polystyrene chains are attached to both ends of a polyolefin chain.

A polyolefin-polystyrene multi-block copolymer and a method of producing the same is disclosed herein. In some embodiments, the polyolefin-polystyrene multi-block copolymer has a first complex viscosity of 40,000 Pa.Math.s to 350,000 Pa.Math.s at a temperature of 160 C. and a first frequency of 0.5 rad/s, and has a second complex viscosity of 900 Pa.Math.s to 3,500 Pa.Math.s at a temperature of 160 C. and a second frequency of 125 rad/s. The polyolefin-polystyrene multi-block copolymer has a structure in which polystyrene chains are attached to both ends of a polyolefin chain.