Disclosed are a copolymer, porous membranes made from the copolymer, and a method of treating fluids using the porous membranes to remove metal ions, for example, from fluids originating in the microelectronics industry, wherein the copolymer includes polymerized monomeric units I and II, wherein monomeric unit I is of the formula A-XCH.sub.2B, wherein A is Rf(CH.sub.2)n, Rf is a perfluoro alkyl group of the formula CF.sub.3(CF.sub.2).sub.x, wherein x is 3-12, n is 1-6, X is O or S, and B is vinylphenyl, the monomeric unit II is haloalkyl styrene, and optionally wherein the halo group of haloalkyl is replaced with an optional substituent, for example, ethylenediamine tetra acetic acid, iminodiacetic acid, or iminodisuccinic acid.

The invention relates to an improved process for forming a stabilised precursor that is suitable for the manufacture of carbon materials, such as carbon fibre. The process can convert a precursor comprising polyacrylonitrile into a stabilised precursor with greater efficiency. The invention also relates to a process for preparing a carbon fibre that utilises the stabilised precursor.

An exemplary embodiment of the present disclosure provides a method of affixing molecules to a polymer material, comprising: placing the polymer material in a reactor; removing at least a portion of sorbed water present in the polymer material; exposing the polymer material to a metal precursor to produce an inorganic-organic polymer hybrid material; and soaking the polymer hybrid material in a solution comprising the molecules.

A method for manufacturing a filter membrane for inhibiting microorganisms includes the following steps: obtaining a nano-zinc precursor and dissolving it into water, adding at least one reducing agent and interfacial agent to the water, thereby reducing zinc ions of the nano-zinc precursor to zinc particles so as to form liquid having nano-zinc particles; respectively placing the liquid having nano-zinc particles and a polymer material into plastic masterbatch process equipment, respectively volatilizing the fluid having nano-zinc particles and polymer material through the plastic masterbatch process equipment, performing air extraction and mixing by the plastic masterbatch process equipment, and adding at least one grafting agent to perform a mixed graft link, allowing the nano-zinc particles and polymer material to be linked together stably so as to form a plastic masterbatch having nano-zinc particles; and making the plastic masterbatch into a filer membrane through film making equipment.

A method is designed to prepare foamed, opacifying elements each having a target light blocking value (LBV.sub.T) of at least 3, using a textile fabric substrate with a light blocking value (LBV.sub.S). The LBV.sub.T-S difference is calculated; a foamable aqueous composition is chosen; a dry coating weight for the foamable aqueous composition (when foamed) is determined to form a single dry opacifying layer that is foamed, dried, and densified to provide a dry thickness at least 20% less than the original dry thickness. The single dry opacifying layer a has light blocking value that is equal to LBV.sub.T-S, 15%. The desired foamable aqueous composition can be chosen from a set of similar compositions to achieve the desired LBV.sub.T with the noted textile fabric substrate using suitable mathematical formula relating dry coating weight to light blocking value and a suitable data processor.

Disclosed is a process for preparing a thermoplastic polymer foam. The process includes providing a molten foamable composition including a thermoplastic polymer and a blowing agent. The blowing agent includes from about 2.0 to about 7.0 parts by weight per hundred resin of the thermoplastic polymer (phr) of 1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzz) and from about 0.73 to about 15.37 phr of methyl formate. At least 50%, by weight, of the HFO-1336mzz is E-1,1,1,4,4,4-hexafluoro-2-butene (E-HFO-1336mzz). The thermoplastic polymer is a polystyrene homopolymer, a polystyrene copolymer, a styrene-acrylonitrile copolymer, a polyethylene, a polypropylene, or a blend thereof. The process also includes extruding the molten foamable composition to produce the thermoplastic polymer foam. The thermoplastic polymer foam has a plurality of cells with at least 80% of the cells being closed cells. The thermoplastic polymer foam is essentially free of structural defects. A thermoplastic polymer foam includes a thermoplastic polymer and a blowing agent.

Provided are a carbon fiber thermoplastic resin prepreg which is a carbon fiber prepreg obtained by impregnating a PAN-based carbon fiber in which the average fiber fineness of a single fiber is 1.0 dtex to 2.4 dtex with a thermoplastic resin, wherein the thermoplastic resin satisfies 20(FM/FS)40 (where FM: flexural modulus (MPa) of a resin sheet comprising only the thermoplastic resin, and FS: flexural strength (MPa) of the resin sheet), a method for manufacturing the same, and a carbon fiber composite material employing the carbon fiber prepreg.

Provided are a carbon fiber thermoplastic resin prepreg which is a carbon fiber prepreg obtained by impregnating a PAN-based carbon fiber in which the average fiber fineness of a single fiber is 1.0 dtex to 2.4 dtex with a thermoplastic resin, wherein the thermoplastic resin satisfies 20(FM/FS)40 (where FM: flexural modulus (MPa) of a resin sheet comprising only the thermoplastic resin, and FS: flexural strength (MPa) of the resin sheet), a method for manufacturing the same, and a carbon fiber composite material employing the carbon fiber prepreg.

The invention relates to a process for the manufacture of thermally expandable thermoplastic microspheres. The process comprises, providing a mixture of monomeric materials suitable for polymerisation to form a thermoplastic polymer and at least one blowing agent, providing to the mixture a colloidal silica that is surface-modified with at least hydrophobic organosilane groups and forming an emulsion. A polymerisation is performed to form the thermally expandable thermoplastic microspheres. The invention further relates to thermally expandable thermoplastic micro spheres, expanded micro spheres and their use in the manufacture of products.

The present invention relates to a sulfur-containing positive electrode material for a secondary battery, a preparation method thereof, and a secondary battery. The sulfur-containing positive electrode material is obtained by uniformly mixing microporous polyacrylonitrile (with a pore diameter of 0.2-2 nm) as a precursor with elemental sulfur and then performing heating treatment. The microporous polyacrylonitrile is obtained through free radical polymerization of an acrylonitrile monomer and a crosslinking agent.