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.

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 2.0 to 5.0% 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.

A polyarylene sulfide in which when the cumulative integral value from the molecular weight of 100 to the molecular weight of 10,000 in a molecular weight distribution curve is 100, the cumulative integrated value at the molecular weight of 4000 is 48 to 53, and when the melt flow rate of the polyarylene sulfide is defined as MFR1, and when the melt flow rate obtained after mixing the polyarylene sulfide with an epoxy silane coupling agent at a weight ratio of 100:1 and heating the resulting mixture at 315.5° C. for 5 minutes is defined as MFR2, the rate of change represented by MFR2/MFR1 is not more than 0.085.

The present invention relates to a powdered material (M) containing at least one poly(arylene sulfide) (PAS) polymer, comprising recurring units p, q and r according of formula (I) wherein n.sub.p, n.sub.q and n.sub.r are respectively the mole % of each recurring units p, q and r; recurring units p, q and r are arranged in blocks, in alternation or randomly; 2≤(n.sub.q+n.sub.r)/(n.sub.p+n.sub.q+n.sub.r)≤9; nq is ≥0% and nr is ≥0%; j is zero or an integer varying between 1 and 4; R.sup.1 is selected from the group consisting of halogen atoms, C.sub.1-C.sub.12 alkyl groups, C.sub.7-C.sub.24 alkylaryl groups, C.sub.7-C.sub.24 aralkyl groups, C.sub.6-C.sub.24 arylene groups, C.sub.1-C.sub.12 alkoxy groups, and C.sub.6-C.sub.18 aryloxy groups.

##STR00001##

The present invention aims to provide a polymer material that has a high refractive index and can be suitably used for applications such as optical applications. The present invention relates to the sulfur-containing polymer containing at least one structural unit selected from the group consisting of a structural unit (A) represented by the following formula (1), a structural unit (B) represented by the following formula (2), and a structural unit (C) represented by the following formula (3); and a reactive functional group,

##STR00001## wherein X.sup.1, X.sup.2, and X.sup.3 are the same as or different from each other and are each an optionally substituted divalent aromatic hydrocarbon group.

The present invention aims to provide a polymeric material having reduced coloration in the visible light region, a high refractive index, and low optical dispersion. The present invention relates to a polymeric material having a sulfoxide structure in a main chain.

The present invention relates to a poly(arylene sulfide) (PAS), comprising recurring units p, q and r according of formula (I) wherein n.sub.p, n.sub.q and n.sub.r are respectively the mole % of each recurring units p, q and r; recurring units p, q and r are arranged in blocks, in alternation or randomly; 2≤(n.sub.q+n.sub.r)/(n.sub.p+n.sub.q+n.sub.r)≤9; n.sub.q is ≥0% and n.sub.r is ≥0%; j is zero or an integer varying between 1 and 4; R.sup.1 is selected from the group consisting of halogen atoms, C.sub.1-C.sub.12 alkyl groups, C.sub.7-C.sub.24 alkylaryl groups, C.sub.7-C.sub.24 aralkyl groups, C.sub.6-C.sub.24 arylene groups, C.sub.1-C.sub.12 alkoxy groups, and C.sub.6-C.sub.18 aryloxy groups.

##STR00001##

A polyphenylene sulfide resin composition includes (A) 100 parts by weight of an acid-treated polyphenylene sulfide resin, (B) 10 to 100 parts by weight of a glass fiber, and (C) 0.1 to 10 parts by weight of an amino group-containing alkoxysilane compound, wherein the polyphenylene sulfide resin composition has an exothermic peak temperature (Tmc) of 195° C. to 225° C., the exothermic peak temperature being observed during a crystallization caused when the polyphenylene sulfide resin composition is melted by heating to 340° C. and then cooled at a rate of 20° C./minute, using a differential scanning calorimeter.

A polyphenylene sulfide resin composition includes (A) 100 parts by weight of an acid-treated polyphenylene sulfide resin, (B) 10 to 100 parts by weight of a glass fiber, and (C) 0.1 to 10 parts by weight of an amino group-containing alkoxysilane compound, wherein the polyphenylene sulfide resin composition has an exothermic peak temperature (Tmc) of 195° C. to 225° C., the exothermic peak temperature being observed during a crystallization caused when the polyphenylene sulfide resin composition is melted by heating to 340° C. and then cooled at a rate of 20° C./minute, using a differential scanning calorimeter.

The present invention relates to a method for manufacturing a polyarylene sulfide resin comprising: reacting a sulfoxide represented by the following formula (1) with a particular aromatic compound to obtain a poly(arylenesulfonium salt) having a particular constitutional unit; and dealkylating or dearylating the poly(arylenesulfonium salt) to obtain a polyarylene sulfide resin having a particular constitutional unit, ##STR00001## wherein R.sup.1 represents an alkyl group having 1 to 10 carbon atoms, etc.; Ar.sup.1 and Ar.sup.2 each independently represent an arylene group optionally having a substituent; and Z represents a direct bond, etc.