A multilayer article is provided which is suitable for use in making (or as) a fuel container by rotational molding, wherein the multilayer article has at least one layer of a thermally cured polymer composition and another layer of a barrier polymer composition, wherein the barrier polymer composition comprises a specified modified ethylene-vinyl alcohol copolymer as a barrier polymer.

Copolymers prepared by a reaction of (1) an unactivated olefin, (2) an activated olefin, and (3) a hydroxyl functional activated olefin and/or a hydroxyl functional unactivated olefin are described. The copolymers have a backbone of polar vinyl monomers and non-polar alkene monomers, with pendant hydroxyl functional groups. The copolymers are well suited for optically clear, pressure sensitive, polyurethane and/or barrier adhesives.

The present invention provides polymers and methods of preparing the same. In certain embodiments, the polymers comprise acrylate repeating units that have been derivatized (e.g., reduced and/or substituted) to form new polymeric structures. In certain embodiments, the polymers described herein self-assemble to form well-defined nanostructures. In some instances, the nanostructures exhibit relatively small d-spacing (e.g., a d-spacing value of 10 nm or less). Due to their properties, the polymers described herein are useful in a variety of applications including functional materials and biomedical applications.

A catalyst composition includes the following components: a) a metallocene compound, b) a co-catalyst component, and c) a phenol, the co-catalyst component being a combination of an organoaluminum compound and an alkyl aluminoxane, or a combination of an organoaluminum compound and an organoboron compound. The catalyst composition is used for the copolymerization of ethylene and a cycloolefin or an alkenol, which can increase the molecular weight of the polymer as well as the content of cycloolefin or alkenol structural unit in the copolymer.

A catalyst composition includes the following components: a) a metallocene compound, b) a co-catalyst component, and c) a phenol, the co-catalyst component being a combination of an organoaluminum compound and an alkyl aluminoxane, or a combination of an organoaluminum compound and an organoboron compound. The catalyst composition is used for the copolymerization of ethylene and a cycloolefin or an alkenol, which can increase the molecular weight of the polymer as well as the content of cycloolefin or alkenol structural unit in the copolymer.

The present invention relates to a process for solution copolymerization process to produce a functionalized polyolefin using a catalyst system comprising a hafnium or zirconium or titanium complex supported by a dianionic tri- and/or tetra-dentate ligand and a co-catalyst selected from the group: MAO, MMAO, DMAO, SMAO or ammonium salts or trityl salts of fluorinated tetraarylborates.

The present invention relates to a process for solution copolymerization process to produce a functionalized polyolefin using a catalyst system comprising a hafnium or zirconium or titanium complex supported by a dianionic tri- and/or tetra-dentate ligand and a co-catalyst selected from the group: MAO, MMAO, DMAO, SMAO or ammonium salts or trityl salts of fluorinated tetraarylborates.

The invention belongs to the technical field of battery dispersing materials, and discloses a preparation method of a comb-shaped positive electrode dispersing material, which comprises the following steps of: mixing a solvent, an unsaturated cyclic monomer, unsaturated branched polyether and a (methyl) acrylate monomer to obtain a mixed solution; heating the mixed solution to a reaction temperature, adding an initiating agent, and keeping the reaction temperature for reaction to obtain a semi-finished product; and adding phosphoric acid which is equal to the (methyl) acrylate monomer in mole into the semi-finished product for esterification and high-temperature dehydration to obtain the comb-shaped positive dispersing material. The invention further discloses a preparation method of a low-internal-resistance electrode plate by taking the comb-shaped positive electrode dispersion material as a raw material.

The present application discloses a secondary battery, a method for preparing the same, a copolymer and an apparatus. The secondary battery includes a binder for binding a first substance and a second substance, the binder including a copolymer, wherein the copolymer comprises at least a first monomer unit represented by formula (I), a second monomer unit represented by formula (II), and a third monomer unit represented by formula (III): ##STR00001## The secondary battery provided by the present application can effectively increase the boding force between the first substance and the second substance by including a specific binder, thereby improving the electrochemical performance of the secondary battery.

The present application discloses a secondary battery, a method for preparing the same, a copolymer and an apparatus. The secondary battery includes a binder for binding a first substance and a second substance, the binder including a copolymer, wherein the copolymer comprises at least a first monomer unit represented by formula (I), a second monomer unit represented by formula (II), and a third monomer unit represented by formula (III): ##STR00001## The secondary battery provided by the present application can effectively increase the boding force between the first substance and the second substance by including a specific binder, thereby improving the electrochemical performance of the secondary battery.