The invention is directed to a composite structure in which a metal member having a roughened surface and a resin member are joined in a state in which at least a portion of the roughened surface is included. The resin member is made of a molded article obtained by melt-molding a polyarylene sulfide resin composition containing a polyarylene sulfide resin. In the roughened surface, a cumulative pore volume of a pore diameter in a range of 0.1 μm to 20 μm is in a range of 0.5 nL/mm.sup.2 or more and 5 nL/mm.sup.2 or less measured by mercury porosimetry. According to the invention, it is possible to provide a composite structure that is obtained by joining a metal member and a molded article made of polyarylene sulfide resin composition and is more excellent in joining strength, heat cycle resistance, and sealing properties, and a method for producing the composite structure.

The invention is directed to a composite structure in which a metal member having a roughened surface and a resin member are joined in a state in which at least a portion of the roughened surface is included. The resin member is made of a molded article obtained by melt-molding a polyarylene sulfide resin composition containing a polyarylene sulfide resin. In the roughened surface, a cumulative pore volume of a pore diameter in a range of 0.1 μm to 20 μm is in a range of 0.5 nL/mm.sup.2 or more and 5 nL/mm.sup.2 or less measured by mercury porosimetry. According to the invention, it is possible to provide a composite structure that is obtained by joining a metal member and a molded article made of polyarylene sulfide resin composition and is more excellent in joining strength, heat cycle resistance, and sealing properties, and a method for producing the composite structure.

A sulfur-containing compound and a halogenated aromatic compound are used as raw materials, with an alkaline compound and a fatty acid as polycondensation aids to carry out a polycondensation reaction. After purification treatment, a primary polyphenylene sulfide is obtained which then reacts with a chain extender at high temperature to form a high molecular weight polyphenylene sulfide resin. A preparation method has the advantages of being high yield, low cost, and capable of selectively and controllably preparing polyphenylene sulfide resins with different melt viscosities and molecular weights, and the obtained polyphenylene sulfide resins have excellent heat resistance. The linear high molecular weight polyphenylene sulfide resin with high thermal stability can be used for producing plates, pipes and rods, can be mechanically processed like metals, such as cutting, grinding, polishing, drilling, and can be used to produce fibers, membranes, films, and are applicable to automotive parts, electronic/electrical equipment, chemical and machinery.

A sulfur-containing compound and a halogenated aromatic compound are used as raw materials, with an alkaline compound and a fatty acid as polycondensation aids to carry out a polycondensation reaction. After purification treatment, a primary polyphenylene sulfide is obtained which then reacts with a chain extender at high temperature to form a high molecular weight polyphenylene sulfide resin. A preparation method has the advantages of being high yield, low cost, and capable of selectively and controllably preparing polyphenylene sulfide resins with different melt viscosities and molecular weights, and the obtained polyphenylene sulfide resins have excellent heat resistance. The linear high molecular weight polyphenylene sulfide resin with high thermal stability can be used for producing plates, pipes and rods, can be mechanically processed like metals, such as cutting, grinding, polishing, drilling, and can be used to produce fibers, membranes, films, and are applicable to automotive parts, electronic/electrical equipment, chemical and machinery.

A method of producing a polyarylene sulfide composed of amino groups, the method including allowing at least a dihalogenated aromatic compound, an inorganic sulfurizing agent and a compound (A) to react in an organic polar solvent and in the presence of an alkali metal hydroxide, wherein: said compound (A) is present in an amount of 0.04 moles or more and 0.5 moles or less with respect to 1 mole of said inorganic sulfurizing agent, in a reaction vessel; and said compound (A) is a compound comprising at least one aromatic ring, and having, on said one aromatic ring, an amino group, and at least one functional group selected from the group consisting of hydroxyl group, a salt of hydroxyl group, thiol group and a salt of thiol group.

A method of producing a polyarylene sulfide composed of amino groups, the method including allowing at least a dihalogenated aromatic compound, an inorganic sulfurizing agent and a compound (A) to react in an organic polar solvent and in the presence of an alkali metal hydroxide, wherein: said compound (A) is present in an amount of 0.04 moles or more and 0.5 moles or less with respect to 1 mole of said inorganic sulfurizing agent, in a reaction vessel; and said compound (A) is a compound comprising at least one aromatic ring, and having, on said one aromatic ring, an amino group, and at least one functional group selected from the group consisting of hydroxyl group, a salt of hydroxyl group, thiol group and a salt of thiol group.

A polyphenylene sulfide resin composition for automotive cooling parts contains, with respect to 100 parts by weight of a polyphenylene sulfide resin (A): 30 to 110 parts by weight of glass fibers (B); and 0.1 to 3 parts by weight of a silane compound (C) having a functional group selected from an amino group and an isocyanate group. In this polyphenylene sulfide resin composition, the PPS resin (A) has a number-average molecular weight of 7,000 to 14,000, and gives a residue amount of 0.05 to 1.0% by weight when dissolved in 20-fold amount by weight of 1-chloronaphthalene at 250° C. for 5 minutes and subsequently subjected to heat pressure filtration through a PTFE membrane filter having a pore size of 1 μm.

Provided are a purification method for a polyarylene sulfide (PAS) that can efficiently reduce the amount of a carboxyalkylamino group-containing compound in the PAS by treating the carboxyalkylamino group-containing compound in the PAS under a low pressure without using a strong acid, and a production method for a PAS having a reduced amount of the carboxyalkylamino group-containing compound in the PAS. The purification method for a PAS includes: a step of obtaining a crude PAS-containing mixture by removing a solvent from a crude reaction product containing the PAS obtained by reacting a polyhalo aromatic compound with a sulfidizing agent in an organic polar solvent; a step of bringing the crude PAS mixture into contact with water and an oxygen atom-containing solvent to convert the crude PAS into porous particles; and a step of bringing the obtained porous particles into contact with carbonated water.

Provided are a purification method for a polyarylene sulfide (PAS) that can efficiently reduce the amount of a carboxyalkylamino group-containing compound in the PAS by treating the carboxyalkylamino group-containing compound in the PAS under a low pressure without using a strong acid, and a production method for a PAS having a reduced amount of the carboxyalkylamino group-containing compound in the PAS. The purification method for a PAS includes: a step of obtaining a crude PAS-containing mixture by removing a solvent from a crude reaction product containing the PAS obtained by reacting a polyhalo aromatic compound with a sulfidizing agent in an organic polar solvent; a step of bringing the crude PAS mixture into contact with water and an oxygen atom-containing solvent to convert the crude PAS into porous particles; and a step of bringing the obtained porous particles into contact with carbonated water.

Described herein are poly(arylene sulfide) (“PAS”) polymers (PASP) including recurring units formed from selected dihalofluorene monomers. Surprisingly, at relative low dihalofluorene monomer concentrations, the PAS polymers (PASP) have significantly increased glass transition temperatures (“T.sub.g”) and impact performance, relative to analogous PAS homopolymers and PAS polymers (PASP) including recurring units formed from 4,4′-dibromobiphenyl (“DBBP”). Simultaneously, the PAS polymers (PASP) also retain high elastic modulus. Furthermore, the PAS polymers (PASP) are free of recurring units formed from polyhalogenated biphenyls (e.g. DBBP and polychlorinated biphenyls) and, therefore, are not currently subject to restrictive governmental regulation. Due at least in part to the excellent thermal (T.sub.g, T.sub.c and T.sub.m) and impact properties of the PAS polymers (PASP), the PAS polymers (PASP) and PAS polymer compositions can be desirably incorporated into wide variety of articles including, but not limited to, automotive articles, electrical and electronic articles, articles for aerospace and oil and gas articles.