Abstract: A resin composition comprising a resin(S) comprising: a polyerytene other (A) having a ratio of peak integral value of 3.80 to 3.92 ppm relative to a peak integral value of 6.20 to 6.72 ppm being 0.05 to 5.0%, in 1H-NMR spectrum obtained by 1H-NMR spectrum measurement using deuterated chloroform as a solvent, and a thermoplastic resin (B), and an inorganic filler (C).

Abstract: A thermoplastic resin composition comprising a thermoplastic resin (A), a polyarylene ether modified with a functional group (B), a coupling agent (C), and carbon fibers (D).

Abstract: Provided is a resin composition containing a resin (S) containing a polyarylene ether (A) modified with a functional group and a thermoplastic resin (B), and a carbon fiber (C).

Abstract: A fiber-reinforced polyamide resin base material comprises continuous reinforcing fibers, or comprises a reinforcing fiber base material in which discontinuous reinforcing fibers are dispersed, impregnated with a polyamide resin. In the polyamide resin, at least part of the polymer constituting the polyamide resin is an end-modified polyamide resin having, at an end group of the polymer, a structure constituted by a structural unit different from a repeating structural unit constituting the backbone of the polymer. A fiber-reinforced polyamide resin base material having an excellent impregnation property and thermal stability, less void, and excellent surface quality is provided.

Abstract: Provided is an end modified polyamide resin containing 1 to 20% by mass of an end structure represented by the following general formula (I) and 0.1 to 5% by mass of an end structure represented by the following general formula (II): —X—(R1—O)m—R2??(I) wherein m represents 2 to 100; R1 represents a divalent hydrocarbon group having 2 to 10 carbon atoms, and R2 represents a monovalent hydrocarbon group having 1 to 30 carbon atoms; —X— represents —NH—, —N(CH3)— or —(C?O)—; and m R1s in the general formula (I) may be the same or different, and —Y—R3??(II) wherein R3 represents a monovalent hydrocarbon group having 1 to 30 carbon atoms; and —Y— in the general formula (II) represents —(C?O)— when X in the general formula (I) is —NH— or —N(CH3)—, Y in the general formula (II) represents —NH— or —N(CH3)— when X in the general formula (I) is —(C?O)—.

Abstract: A terminally modified polyamide resin has a terminal structure represented by general formula (I), wherein the terminal structure represented by general formula (I) is contained at a quantity of 1-10 mass % relative to 100 mass % of the terminally modified polyamide resin, the weight average molecular weight/content [mass %] ratio of the terminal structure represented by general formula (I) is 6,000-20,000, and the melt viscosity at a temperature corresponding to melting point+60° C. and at a shear rate of 9728 sec?1 is 0.1-8 Pa·s. General formula (I) is as follows: —X—(R1—O)m-R2 (I). In general formula (I), m denotes the range 2-100, R1 denotes a divalent hydrocarbon group having 2-10 carbon atoms, and R2 denotes H or a monovalent organic group, and —X— denotes —NH—, —N(CH3)—, —(C?O)— or —CH2—CH(OH)—CH2—O—. The number m of R1 groups contained in general formula (I) may be the same as, or different from, each other.

Abstract: A fiber-reinforced polyamide resin base material comprises continuous reinforcing fibers, or comprises a reinforcing fiber base material in which discontinuous reinforcing fibers are dispersed, impregnated with a polyamide resin. In the polyamide resin, at least part of the polymer constituting the polyamide resin is an end-modified polyamide resin having, at an end group of the polymer, a structure constituted by a structural unit different from a repeating structural unit constituting the backbone of the polymer. A fiber-reinforced polyamide resin base material having an excellent impregnation property and thermal stability, less void, and excellent surface quality is provided.

Abstract: A polyester resin composition having excellent hydrolysis resistance and excellent transparency and a method of producing the same are provided. There is provided a polyester resin composition comprising a polyester resin that is obtained from a dicarboxylic acid or an ester-forming derivative thereof and a diol as main raw material; and a copper-containing compound and a chelate ligand compound having a nitrogen-containing heterocyclic structure or a tertiary amine structure that are mixed with the polyester resin.

Abstract: Provided is an end modified polyamide resin containing 1 to 20% by mass of an end structure represented by the following general formula (I) and 0.1 to 5% by mass of an end structure represented by the following general formula (II): —X—(R1—O)m—R2??(I) wherein m represents 2 to 100; R1 represents a divalent hydrocarbon group having 2 to 10 carbon atoms, and R2 represents a monovalent hydrocarbon group having 1 to 30 carbon atoms; —X— represents —NH—, —N(CH3)— or —(C?O)—; and m R1s in the general formula (I) may be the same or different, and —Y—R3??(II) wherein R3 represents a monovalent hydrocarbon group having 1 to 30 carbon atoms; and —Y— in the general formula (II) represents —(C?O)— when X in the general formula (I) is —NH— or —N(CH3)—, Y in the general formula (II) represents —NH— or —N(CH3)— when X in the general formula (I) is —(C?O)—.

Abstract: A polyester resin composition having excellent hydrolysis resistance and excellent transparency and a method of producing the same are provided. There is provided a polyester resin composition comprising a polyester resin that is obtained from a dicarboxylic acid or an ester-forming derivative thereof and a diol as main raw material; and a copper-containing compound and a chelate ligand compound having a nitrogen-containing heterocyclic structure or a tertiary amine structure that are mixed with the polyester resin.

Abstract: A thermoplastic polyester resin composition includes 100 parts by weight of a thermoplastic polyester resin (A) having a melting point of 180 to 250° C. and 0.01 to 1 part by weight of a metal halide (B), wherein an area average particle size of the metal halide (B) in the thermoplastic polyester resin composition is 0.1 to 500 nm. The thermoplastic polyester resin composition has an excellent melt retention stability and is capable of producing a molded article excellent in mechanical properties and long-term resistance to oxidative degradation.

Abstract: A polyester resin composition having excellent hydrolysis resistance and excellent transparency and a method of producing the same are provided. There is provided a polyester resin composition comprising a polyester resin that is obtained from a dicarboxylic acid or an ester-forming derivative thereof and a diol as main raw material; and a copper-containing compound and a nitrogen-containing compound having a nitrogen-containing heterocyclic structure or a tertiary amine structure that are mixed with the polyester resin.

Abstract: A method of producing a polylactic acid block copolymer constituted of a segment(s) composed of L-lactic acid units and a segment(s) composed of D-lactic acid units, includes obtaining a mixture by mixing poly-L-lactic acid and poly-D-lactic acid one of which has a weight average molecular weight of 60,000 to 300,000 and the other of which has a weight average molecular weight of 10,000 to 50,000, the mixture having a weight average molecular weight of not less than 90,000 and a degree of stereocomplexation (Sc) satisfying: Sc=?Hh/(?Hl+?Hh)×100>60 (wherein ?Hh represents the heat of fusion of stereocomplex crystals (J/g), and ?Hl represents the heat of fusion of crystals of poly-L-lactic acid alone and crystals of poly-D-lactic acid alone (J/g)); and subsequently subjecting the mixture to solid-phase polymerization at a temperature lower than the melting point of the mixture.

Abstract: A polylactic acid resin composition includes 0.15 to 0.90 parts by weight of an organic nucleating agent (B) in addition to 100 parts by weight of a polylactic acid resin (A) comprised of a poly-L-lactic acid component and a poly-D-lactic acid component. The polylactic acid resin composition satisfies (i) to (v): (i) amount of a linear oligomer of L-lactic acid and/or D-lactic acid is equal to or less than 0.3 parts by weight; (ii) rate of weight-average molecular weight retention is equal to or greater than 70% after the polylactic acid resin composition is retained in a closed state at 220° C. for 30 minutes; (iii) degree of stereocomplexation (Sc) exceeds 80%; (iv) stereocomplex crystal melting heat quantity ?Hmsc is equal to or greater than 30 J/g; and (v) cooling crystallization heat quantity (?Hc) is equal to or greater than 20 J/g.

Abstract: A polylactic acid block copolymer constituted by a poly-L-lactic acid segment(s) contains as a major component L-lactic acid and a poly-D-lactic acid segment(s) contains as a major component D-lactic acid, the polylactic acid block copolymer satisfying Inequalities (1) and (2): Sc=?Hh/(?Hl+?Hh)×100>80 (1); 1<(Tm?Tms)/(Tme?Tm)<1.8 (2). The polylactic acid block copolymer has excellent transparency, heat resistance and mechanical properties, which forms a polylactic acid stereocomplex.

Abstract: A method of producing a polylactic acid block copolymer constituted of a segment(s) composed of L-lactic acid units and a segment(s) composed of D-lactic acid units, includes obtaining a mixture by mixing poly-L-lactic acid and poly-D-lactic acid one of which has a weight average molecular weight of 60,000 to 300,000 and the other of which has a weight average molecular weight of 10,000 to 50,000, the mixture having a weight average molecular weight of not less than 90,000 and a degree of stereocomplexation (Sc) satisfying: Sc=?Hh/(?Hl+?Hh)×100>60 (wherein ?Hh represents the heat of fusion of stereocomplex crystals (J/g), and ?Hl represents the heat of fusion of crystals of poly-L-lactic acid alone and crystals of poly-D-lactic acid alone (J/g)); and subsequently subjecting the mixture to solid-phase polymerization at a temperature lower than the melting point of the mixture.

Abstract: A process for continuously producing a thermoplastic copolymer, in which a copolymer (A) containing unsaturated carboxylic acid alkyl ester units and unsaturated carboxylic acid units is produced and in succession heat-treated to perform intramolecular cyclization reaction by dehydration and/or dealcoholization reaction, for producing a thermoplastic copolymer (B) containing glutaric anhydride units and the unsaturated carboxylic acid alkyl ester units. The obtained copolymer is excellent in heat resistance and colorless transparency and very small in foreign matter content.

Abstract: A process for continuously producing a thermoplastic copolymer, in which a copolymer (A) containing unsaturated carboxylic acid alkyl ester units and unsaturated carboxylic acid units is produced and in succession heat-treated to perform intramolecular cyclization reaction by dehydration and/or dealcoholization reaction, for producing a thermoplastic copolymer (B) containing glutaric anhydride units and the unsaturated carboxylic acid alkyl ester units. The obtained copolymer is excellent in heat resistance and colorless transparency and very small in foreign matter content.