Provided is an amorphous epoxy fiber excellent in dimensional stability, a fiber structure comprising at least in part amorphous epoxy fibers, and a molded body formed by melting said fibers. The amorphous epoxy fiber has a birefringence value of 0.005 or lower. For example, the amorphous epoxy fiber may include an amorphous epoxy resin represented by the following general formula:

##STR00001## in which, X is a residue of a bivalent phenol and n is 20 or greater (preferably 20 to 300, more preferably 40 to 280, still more preferably 50 to 250). The amorphous epoxy fiber may have an average fiber diameter of single fibers of 40 μm or smaller.

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.

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 invention relates to strong hydrogen-bond acidic sorbents. The sorbents may be provided in a form that limits or eliminates intramolecular bonding of the hydrogen-bond acidic site between neighboring sorbent molecules, for example, by providing steric groups adjacent to the hydrogen-bond acidic site. The hydrogen bond site may be a phenolic structure based on a bisphenol architecture. The sorbents of the invention may be used in methods for trapping or detecting hazardous chemicals or explosives.

The invention provides a laminate having a first substrate formed of a semiconductor substrate; a second substrate formed of a light-transmissive support substrate; and an adhesive layer and a release layer disposed between the first substrate and the second substrate, characterized in that the release layer is a film formed from a releasing agent composition containing a polynuclear phenol derivative represented by formula (P) (wherein Ar represents an arylene group), a cross-linking agent, and at least one of an acid generator and an acid.

##STR00001##

A polycarbonate resin having a high refractive index, a low Abbe number and a high moisture and heat resistance is provided. In an embodiment, a polycarbonate resin including a structural unit represented by general formula (1) below is provided.

##STR00001##

A phenolic hydroxyl-containing compound is provided. The compound dissolves well in solvents and can be formulated into compositions that give coatings superior in thermal decomposition resistance, alkali developability, resolution, and dry-etch resistance. Specifically, the compound is a phenolic hydroxyl-containing calixarene represented by structural formula (1):

##STR00001##

(where A is a structural unit including a dihydroxynaphthalene- or naphthol-derived structure optionally with a substituent alkyl, alkoxy, aryl, or aralkyl group or halogen atom on the aromatic rings and a methylene group optionally having an alkyl or aryl group in place of one of the hydrogen atoms) and obtained using a dihydroxynaphthalene in combination with a naphthol, with the total repeat number p being an integer of 2 to 10.

A phenolic hydroxyl-containing compound is provided. The compound dissolves well in solvents and can be formulated into compositions that give coatings superior in thermal decomposition resistance, alkali developability, resolution, and dry-etch resistance. Specifically, the compound is a phenolic hydroxyl-containing calixarene represented by structural formula (1):

##STR00001##

(where A is a structural unit including a dihydroxynaphthalene- or naphthol-derived structure optionally with a substituent alkyl, alkoxy, aryl, or aralkyl group or halogen atom on the aromatic rings and a methylene group optionally having an alkyl or aryl group in place of one of the hydrogen atoms) and obtained using a dihydroxynaphthalene in combination with a naphthol, with the total repeat number p being an integer of 2 to 10.

We report a new class of single-ion electrolyte including pendant lithium perfluoroethyl sulfonates. Embodiments may be based on, for example, aromatic poly(arylene ether)s, polyphenylenes, or polyarylene sulfides. The microporous polymer film saturated with organic carbonates exhibits a nearly unity t.sub.Li+, state-of-the-art conductivities (e.g. >10.sup.−3 S cm.sup.−1 at room temperature) over a wide range of temperatures, high electrochemical stability, and outstanding mechanical properties, which enables the membrane to function as both ion conducting medium and separator in the batteries.

We report a new class of single-ion electrolyte including pendant lithium perfluoroethyl sulfonates. Embodiments may be based on, for example, aromatic poly(arylene ether)s, polyphenylenes, or polyarylene sulfides. The microporous polymer film saturated with organic carbonates exhibits a nearly unity t.sub.Li+, state-of-the-art conductivities (e.g. >10.sup.−3 S cm.sup.−1 at room temperature) over a wide range of temperatures, high electrochemical stability, and outstanding mechanical properties, which enables the membrane to function as both ion conducting medium and separator in the batteries.