A method of production of sorbents involving acylation of a macroporous styrene-divinylbenzene copolymer in the presence of the Friedel-Crafts catalystaluminum chloride. The acylation reaction is carried out using acetyl chloride in a dichloroethane solvent at boiling the solution. This is followed by phosphorylation of the obtained acylated copolymer with phosphorus trichloride at room temperature; the product is hydrolyzed with water, washed and dried. The technical result consists in production of a complexing adsorbent highly selective for scandium and simplification of the production process.

A method of production of sorbents involving acylation of a macroporous styrene-divinylbenzene copolymer in the presence of the Friedel-Crafts catalystaluminum chloride. The acylation reaction is carried out using acetyl chloride in a dichloroethane solvent at boiling the solution. This is followed by phosphorylation of the obtained acylated copolymer with phosphorus trichloride at room temperature; the product is hydrolyzed with water, washed and dried. The technical result consists in production of a complexing adsorbent highly selective for scandium and simplification of the production process.

A method of production of sorbents involving acylation of a macroporous styrene-divinylbenzene copolymer in the presence of the Friedel-Crafts catalystaluminum chloride. The acylation reaction is carried out using acetyl chloride in a dichloroethane solvent at boiling the solution. This is followed by phosphorylation of the obtained acylated copolymer with phosphorus trichloride at room temperature; the product is hydrolyzed with water, washed and dried. The technical result consists in production of a complexing adsorbent highly selective for scandium and simplification of the production process.

The present disclosure provides a process. In an embodiment, the process includes melt blending, at a temperature from 80 C. to 200 C., a composition composed of (i) an ethyl-ene-SiH polymer, (ii) a crosslink agent that is 1,3-dibenzoylpropane, (iii) a triarylborane, and (iv) an alkylamine inhibitor. The process further includes forming a crosslinked ethylene-Si polymer. The present disclosure also provides crosslinked ethylene-Si polymer composition composed from the present process.

The present disclosure provides a process. In an embodiment, the process includes melt blending, at a temperature from 80 C. to 200 C., a composition composed of (i) an ethyl-ene-SiH polymer, (ii) a crosslink agent that is 1,3-dibenzoylpropane, (iii) a triarylborane, and (iv) an alkylamine inhibitor. The process further includes forming a crosslinked ethylene-Si polymer. The present disclosure also provides crosslinked ethylene-Si polymer composition composed from the present process.

Provided is an organic electronic nose using a semi-permeable polymer membrane and also provided is a method for detecting chemical species using the same, in which the organic electronic nose using a novel polyvinyl alcohol-based semi-permeable polymer membrane can detect and distinguish the chemical species with significantly enhanced selectivity for analytes.

Provided is an organic electronic nose using a semi-permeable polymer membrane and also provided is a method for detecting chemical species using the same, in which the organic electronic nose using a novel polyvinyl alcohol-based semi-permeable polymer membrane can detect and distinguish the chemical species with significantly enhanced selectivity for analytes.

The preparation of amine containing polymers from commodity polyolefins has been achieved through the functionalization of polybutadiene. The pre-functionalized polybutadiene is comprised of butadiene and optionally other monomers such as styrene. The butadiene monomer can be enchained with a mixture of both 1,4- and 1,2-subunits. Amine functionalization of the polybutadiene substrate has been afforded using a single step catalytic reaction termed hydroaminoalkylation (HAA).

The preparation of amine containing polymers from commodity polyolefins has been achieved through the functionalization of polybutadiene. The pre-functionalized polybutadiene is comprised of butadiene and optionally other monomers such as styrene. The butadiene monomer can be enchained with a mixture of both 1,4- and 1,2-subunits. Amine functionalization of the polybutadiene substrate has been afforded using a single step catalytic reaction termed hydroaminoalkylation (HAA).

Disclosed is method for on-site glyoxylation of polyacrylamide in a paper or board mill, where a discontinuous batch glyoxylation reaction of aqueous reaction mixture is performed in reactor vessel having driven agitator to form aqueous polymer composition comprising glyoxylated polyacrylamide. The method comprises forming or obtaining the aqueous reaction mixture comprising polyacrylamide base polymer and glyoxal, determining alkali consumption of the mixture, and adding to the mixture, based on determined alkali consumption, pre-determined amount of alkali for adjusting pH to 8-10. The temperature is optionally adjusted to 15-40 C. and the on-site glyoxylation reaction of polyacrylamide base polymer is allowed to proceed. Viscosity of the mixture and/or a variable related to the viscosity is measured, acid is added to the mixture for lowering pH to <8, when a predetermined end viscosity value is attained, and the aqueous polymer composition comprising glyoxylated polyacrylamide is removed from the reaction vessel.