摘要:
A production method includes a process (I) of heating a cyclic polyarylene sulfide composition under reduced pressure and a process (II) of heating and polymerizing a cyclic polyarylene sulfide composition. This simple method allows for production of a polyarylene sulfide of the higher molecular weight and can produce a polyarylene sulfide having a narrow molecular weight distribution, low gas generation and high industrial usability. Additionally, pelletization after the process (I) can produce a cyclic polyarylene sulfide pellet having ease of conveyance, excellent molding processability, less gas generation amount and high industrial usability.
摘要:
This invention relates to: a molding material comprising a bundle of continuous reinforcing fibers (A), a polyarylene sulfide prepolymer (B) comprising at least 50% by weight of cyclic polyarylene sulfide and having the weight average molecular weight of less than 10,000 or polyarylene sulfide (B') having the weight average molecular weight of 10,000 or greater and the degree of dispersion of 2.5 or lower, and thermoplastic resin (C); a prepreg comprising a resin composition comprising the polyarylene sulfide prepolymer (B) impregnated into a reinforcing fiber; and a method for producing a fiber-reinforced molding substrate comprising step (I) of continuously feeding a bundle of continuous reinforcing fibers, step (II) of combining cyclic polyarylene sulfide with the reinforcing fiber bundle, step (III) of heating the composite obtained in step (II) to subject the cyclic polyarylene sulfide to ring-opening polymerization to convert into polyarylene sulfide, and step (IV) of cooling the composite obtained in step (III) and withdrawing the same.
摘要:
Disclosed are: A molding material comprising: a composite comprising 1 to 50 wt% of (A) a bundle of continuous reinforcing fibers and 0.1 to 40 wt% of (B) a polyarylene sulfide prepolymer or (B') a polyarylene sulfide; and 10 to 98.9 wt% of (C) a thermoplastic resin adhered to the composite; wherein the composite further comprises (D) a zero-valent transition metal compound or (E) a low-valent iron compound in an amount of 0.001 to 20 mol% based on the amount of sulfur atoms contained in the component (B) or (B'); a prepreg; and a method of producing a fiber-reinforced molding base material. By using the molding material according to the present invention which exhibits excellent economical efficiency and productivity, a molded article having excellent mechanical characteristics can be easily produced.
摘要:
Disclosed is a method for producing a cyclic polyarylene sulfide, wherein a for producing a cyclic polyarylene sulfide is produced by heating a reaction mixture which is composed of at least a linear polyarylene sulfide (a), a sulfidizing agent (b), a dihalogenated aromatic compound (c) and an organic polar solvent (d). This method for producing a cyclic polyarylene sulfide is characterized in that not less than 1.25 liters of the organic polar solvent is used per 1 mole of the sulfur content in the reaction mixture. This method enables to efficiently produce a cyclic polyarylene sulfide, more specifically cyclic oligoarylene sulfide by an economical and simple process in short time.
摘要:
A reactive functional group-containing polyarylene sulfide being narrow in dispersity and little in gas generation amount is produced by heating a cyclic polyarylene sulfide composition in the presence of 0.1 mol% to 25 mol%, per mol of arylene sulfide structural units, of a sulfide compound having a reactive functional group selected from among an amino group, a carboxyl group, a hydroxyl group, an acid anhydride group, an isocyanate group, an epoxy group, a silanol group, and an alkoxysilane group.
摘要:
Provided is a molding material comprising a composite of 1 to 50 wt% of a continuous reinforcing fiber bundle (A) and 0.1 to 20 wt% of a poly (phenylene ether ether ketone) oligomer (B); and 30 to 98.9 wt% of a thermoplastic resin (C) adhering to the composite, wherein the component (B) has a melting point of not higher than 270°C. Also provided are a method for molding the molding material, a method for producing the molding material, and a method for producing a fiber-reinforced composite material. A molded article having high heat resistance and dynamic properties can be easily produced without impairing the economic efficiency and productivity during the process for producing a molding material. In addition, a fiber-reinforced composite material can be produced with more ease and high productivity.
摘要:
A production method includes a process (I) of heating a cyclic polyarylene sulfide composition under reduced pressure and a process (II) of heating and polymerizing a cyclic polyarylene sulfide composition. This simple method allows for production of a polyarylene sulfide of the higher molecular weight and can produce a polyarylene sulfide having a narrow molecular weight distribution, low gas generation and high industrial usability. Additionally, pelletization after the process (I) can produce a cyclic polyarylene sulfide pellet having ease of conveyance, excellent molding processability, less gas generation amount and high industrial usability.
摘要:
There is provided a polyphenylene sulfide resin composition, comprising 5 to 95% by weight of a component (B) which is a polyphenylene sulfide resin having a weight-average molecular weight of not less than 10,000 and a weight loss percentage ΔWr of not greater than 0.18% under heating, relative to 95 to 5% by weight of a component (A) which is a polyphenylene sulfide resin having the weight loss percentage ΔWr of greater than 0.18%, wherein a total of the component (A) and the component (B) is equal to 100% by weight.
摘要:
The object of the invention is to provide a method of economically and efficiently recovering an industrially useful cyclic poly(phenylene ether ether ketone) composition in a short time. A mixture including linear poly(phenylene ether ether ketone) and cyclic poly(phenylene ether ether ketone) is exposed to a ketone-based solvent and is then subjected to solid-liquid separation. This enables recovery of a cyclic poly(phenylene ether ether ketone) composition including a cyclic poly(phenylene ether ether ketone) mixture of cyclic poly(phenylene ether ether ketone)s having different repeating numbers m.