A styrene resin having a syndiotactic structure, with an endothermic amount in a range of 175 to 260° C. of less than 30% based on the total endothermic amount, and a styrene resin composition containing 50 to 95% by mass of a thermoplastic resin composition and 5 to 50% by mass of a glass filler, the thermoplastic resin composition containing 100 parts by mass containing 80 to 100% by mass of a styrene resin having a syndiotactic structure and 0 to 20% by mass of a rubbery elastic material, 0.2 to 2.0 parts by mass of at least one kind of an antioxidant selected from a phenol-based antioxidant and a sulfur antioxidant, 1.5 to 5.0 parts by mass of at least one kind of a compound selected from a polyphenylene ether or a modified polyphenylene ether, and at least one kind selected from a nucleating agent or a release agent.

The present application provides a resin component, and a prepreg and a circuit material using the same. The resin component comprises unsaturated polyphenylene ether resin, polyolefin resin, terpene resin and an initiator. When the total weight of the unsaturated polyphenylene ether resin, polyolefin resin and terpene resin is defined as 100 parts by weight, the terpene resin is in an amount of 3-40 parts by weight. The polyolefin resin is one or a combination of at least two selected from the group consisting of unsaturated polybutadiene resin, SBS resin and styrene butadiene resin. The present application discloses that the resulting resin composition has good film-forming properties, adhesion and dielectric properties through the coordination of unsaturated polyphenylene ether resin, unsaturated polyphenylene ether resin, polyolefin resin and terpene resin, and the circuit boards using the same have higher interlayer peel strength and lower dielectric loss.

An aspect of the present application relates to a resin composition, which contains a polymer having a structural unit represented by Formula (1) in a molecule and a free radical compound and in which the free radical compound has at least one free radical group selected from the group consisting of structures represented by Formulas (2), (3), (4) and (5) in the molecule.

An aspect of the present invention relates to a resin composition, which contains a modified polyphenylene ether compound of which a terminal is modified with a substituent having a carbon-carbon unsaturated double bond and a free radical compound, in which the free radical compound has at least one free radical group selected from the group consisting of structures represented by Formulas (1), (2), (3) and (4) in a molecule.

The present disclosure provides a polyphenylene ether composition having a high glass transition temperature and a long-term solubility in a solvent, and exhibiting a low viscosity when being dissolved in a solvent. The polyphenylene ether composition of the present disclosure contains 60 mol % or more of a polyphenylene ether having the structure of Formula (1), wherein the ratio of the integrated value of the peak appearing at 7.6 to 8.3 ppm to the integrated value of the peak derived from the structure of the following Formula (2) in a .sup.1H-NMR measurement result is 1 or less, and the number average molecular weight in terms of polystyrene is 500 to 15,000 g/mol.

An ion conducting polymer comprising a modified poly(phenylene oxide) is described. In an exemplary modified polymer, a portion of the monomeric units are attached to a sulfonate-substituted arylamino moiety, such as a monovalent derivative of phenoxy aniline trisulfonate (BOATS), to form a monomeric unit with a charged side chain. Ion conducting polymers can also be prepared with polyether-containing side chains. The ion conducting polymer can be used to prepare ion exchange membranes which can be used in a variety of applications, such as in non-aqueous redox flow batteries and related energy storage systems.

A rubber composition is based on at least one predominant vinylaromatic diene elastomer, having a vinylaromatic content of less than 10%; from 3 to 50 phr of a thermoplastic resin, denoted PPE resin, comprising optionally substituted polyphenylene ether units, the resin having a number-average molecular weight (Mn) of less than 6000 g/mol; from 5 to 60 phr of silica as predominant reinforcing filler; and a crosslinking system. Also disclosed are rubber articles comprising such a composition and in particular tires.

A polyphenylene ether resin modified with benzoxazine, a method for producing the same, and a substrate material for a circuit board are provided. The polyphenylene ether resin modified with the benzoxazine has a structural formula as follows:

##STR00001## in which R represents a chemical group that is located between two hydroxyphenyl functional groups of a bisphenol compound, and n is an integer between 3 and 25, inclusive.

A polyphenylene ether resin modified with bismaleimide, a method for producing the same, and a substrate material for a circuit board are provided. The polyphenylene ether resin modified with the bismaleimide has a structural formula as follows:

##STR00001##

in which R represents a chemical group that is located between two hydroxyphenyl functional groups of a bisphenol compound, and n is an integer between 3 and 25, inclusive.

A polyphenylene ether resin modified with two amino functional groups, a method for producing the same, and a substrate material for a circuit board are provided. The polyphenylene ether resin modified with the two amino functional groups has a structural formula as follows:

##STR00001## in which R represents a chemical group that is located between two hydroxyphenyl functional groups of a bisphenol compound, and n is an integer between 3 and 25, inclusive.