A quad-polymer composition includes monomers of (a) acrylonitrile, (a) vinylimidazole, (c) methyl acrylate and (d) either acrylic acid or itaconic acid. Such quad-polymer compositions may be used to form fibers (such as by melt spinning) that may then be annealed, stabilized, and/or carbonized to produce carbon fibers. The quad-polymer composition may be used for supercapacitors, lithium battery electrodes once carbonized, and as synthesized, it may be used for wound healing fibers, fabrics, coatings, and films, and anti-bacterial/anti-microbial fibers, fabrics, coatings and films. The carbon fibers formed from the quad-polymer composition may be used for the fiber composites for automobile, aerospace structures, marine structures, military equipment/parts, sporting goods, robotics, furniture, and electronic parts.

A method for producing a nitrile group-containing copolymer rubber including copolymerizing a monomer mixture containing an α,β-ethylenically unsaturated nitrile monomer and a conjugated diene monomer, in which the copolymer has a Mooney viscosity (ML1+4, 100° C.) in a range of 30 to 60 at a time point when a polymerization conversion rate is 60%, the copolymerization is carried out until the polymerization conversion rate reaches 85% or more, and the obtained nitrile group-containing copolymer rubber has a Mooney viscosity (ML1+4, 100° C.) of 85 to 150.

A method for producing a nitrile group-containing copolymer rubber including copolymerizing a monomer mixture containing an α,β-ethylenically unsaturated nitrile monomer and a conjugated diene monomer, in which the copolymer has a Mooney viscosity (ML1+4, 100° C.) in a range of 30 to 60 at a time point when a polymerization conversion rate is 60%, the copolymerization is carried out until the polymerization conversion rate reaches 85% or more, and the obtained nitrile group-containing copolymer rubber has a Mooney viscosity (ML1+4, 100° C.) of 85 to 150.

A nitrile-group-containing copolymer rubber, including 15% by weight or more and less than 28% by weight of α,β-ethylenically unsaturated nitrile monomer units (a), 10 to 50% by weight of α,β-ethylenically unsaturated monocarboxylic acid ester monomer units (b), 22 to 74% by weight of conjugated diene monomer units (c), and 1 to 10% by weight of carboxyl group-containing monomer units (d) and having an iodine value of 120 or less, wherein the conjugated diene monomer units (c) are at least partially hydrogenated, and the proportion of isoprene units in the conjugated diene monomer units (c) is 5% by weight or more and less than 33% by weight.

A nitrile-group-containing copolymer rubber, including 15% by weight or more and less than 28% by weight of α,β-ethylenically unsaturated nitrile monomer units (a), 10 to 50% by weight of α,β-ethylenically unsaturated monocarboxylic acid ester monomer units (b), 22 to 74% by weight of conjugated diene monomer units (c), and 1 to 10% by weight of carboxyl group-containing monomer units (d) and having an iodine value of 120 or less, wherein the conjugated diene monomer units (c) are at least partially hydrogenated, and the proportion of isoprene units in the conjugated diene monomer units (c) is 5% by weight or more and less than 33% by weight.

Disclosed is a method of preparing a vinyl cyanide compound-conjugated diene rubber-aromatic vinyl compound graft copolymer, a method of preparing a thermoplastic resin composition including the same, and a thermoplastic resin composition including the same. More specifically, when a conjugated diene compound and a molecular weight regulator are fed in a split manner during polymerization of conjugated diene rubber, and the content of an emulsifier is reduced, gel content may be reduced. In addition, when enlarged conjugated diene-based rubber latex is prepared by enlarging conjugated diene-based rubber latex using an acid enlarging agent, the enlarged conjugated diene-based rubber latex may have an expanded full width at half maximum in particle size distribution, thereby improving gloss, reflection haze, fluidity, and impact resistance. In addition, deposits may be reduced during injection molding.

Disclosed is a method of preparing a vinyl cyanide compound-conjugated diene rubber-aromatic vinyl compound graft copolymer, a method of preparing a thermoplastic resin composition including the same, and a thermoplastic resin composition including the same. More specifically, when a conjugated diene compound and a molecular weight regulator are fed in a split manner during polymerization of conjugated diene rubber, and the content of an emulsifier is reduced, gel content may be reduced. In addition, when enlarged conjugated diene-based rubber latex is prepared by enlarging conjugated diene-based rubber latex using an acid enlarging agent, the enlarged conjugated diene-based rubber latex may have an expanded full width at half maximum in particle size distribution, thereby improving gloss, reflection haze, fluidity, and impact resistance. In addition, deposits may be reduced during injection molding.

Disclosed is a thermoplastic resin composition, a method of preparing the same, and a molded article including the same. Also disclosed is a thermoplastic resin composition including 100 parts by weight of a base resin consisting of a graft copolymer and a non-graft copolymer, 6 to 15 parts by weight of a polyether-amide block copolymer, 0.2 to 0.9 parts by weight of a metal stearate, and 0.001 to 0.006 parts by weight of an organic pigment; a method of preparing the thermoplastic resin composition; and a molded article including the thermoplastic resin composition.

Also disclosed is a thermoplastic resin composition having excellent transparency, colorability, color stability, chemical resistance, and antistatic properties, thus being suitable for use in the manufacture of medical products; a method of preparing the thermoplastic resin composition; and a molded article including the thermoplastic resin composition.

Disclosed is a thermoplastic resin composition, a method of preparing the same, and a molded article including the same. Also disclosed is a thermoplastic resin composition including 100 parts by weight of a base resin consisting of a graft copolymer and a non-graft copolymer, 6 to 15 parts by weight of a polyether-amide block copolymer, 0.2 to 0.9 parts by weight of a metal stearate, and 0.001 to 0.006 parts by weight of an organic pigment; a method of preparing the thermoplastic resin composition; and a molded article including the thermoplastic resin composition.

Also disclosed is a thermoplastic resin composition having excellent transparency, colorability, color stability, chemical resistance, and antistatic properties, thus being suitable for use in the manufacture of medical products; a method of preparing the thermoplastic resin composition; and a molded article including the thermoplastic resin composition.

Disclosed is a thermoplastic resin composition, a method of preparing the same, and a molded article including the same. Also disclosed is a thermoplastic resin composition including 100 parts by weight of a base resin consisting of a graft copolymer and a non-graft copolymer, 6 to 15 parts by weight of a polyether-amide block copolymer, 0.2 to 0.9 parts by weight of a metal stearate, and 0.001 to 0.006 parts by weight of an organic pigment; a method of preparing the thermoplastic resin composition; and a molded article including the thermoplastic resin composition.

Also disclosed is a thermoplastic resin composition having excellent transparency, colorability, color stability, chemical resistance, and antistatic properties, thus being suitable for use in the manufacture of medical products; a method of preparing the thermoplastic resin composition; and a molded article including the thermoplastic resin composition.