Aromatic hydrocarbon

About: Aromatic hydrocarbon is a research topic. Over the lifetime, 5814 publications have been published within this topic receiving 55499 citations. The topic is also known as: arene & arenes.

Impact-resistant styrene resin composition

Abstract: The disclosure relates to a resin composition comprising (A) 75-98 parts by weight of a block copolymer mixture of vinyl aromatic hydrocarbon and conjugated diolefin and (B) 25-2 parts by weight of an impact-resistant styrene resin, characterized in that said copolymer mixture (A) is a mixture of a copolymer (1) and a copolymer (2) (the weight ratio of the copolymer (1) to the copolymer (2) is 1.5 or more), the copolymer (1) being a copolymer which contains 55-85% by weight of vinyl aromatic hydrocarbon, consists of at least one vinyl aromatic hydrocarbon polymer block and at least one conjugated diene polymer block, and has a number average molecular weight of about 10,000 to about 500,000 and the copolymer (2) being a homopolymer of vinyl aromatic hydrocarbon or a copolymer which consists of at least one vinyl aromatic hydrocarbon polymer block and at least one conjugated diene polymer block, the vinyl aromatic hydrocarbon content of said copolymer being 75% by weight or more and at least 5% by weight higher than that of the copolymer (1), said homopolymer or copolymer having a number average molecular weight of about 500 to about 130,000, both of said copolymer (1) and said copolymer (2) being obtained by polymerization in an inert organic solvent with an organolithium compound as a catalyst; and that said impact-resistant styrene resin (B) is a polymer obtained by graft-polymerizing 3-12% by weight of a rubbery conjugated diene polymer and 97-88% by weight of a vinyl aromatic hydrocarbon. The said resin composition is far superior to conventional resin compositions of similar type in balance between impact resistance and transparency.

Aromatic hydrocarbon compound and organic electroluminescence element using thereof

Abstract: PROBLEM TO BE SOLVED: To obtain a new aromatic hydrocarbon compound having an anthracene structure useful as a constituting material for an organic electroluminescence element exhibiting high heat resistance and having excellent luminous efficacy. SOLUTION: Compounds of formulae I, II and III Ar1 to Ar5 are each a (substituted) hydrocarbon group having the number of nuclear atoms of 5-40; m=1-3; p=3-8; q=0-2, and r=0-4, and at the same time q+r=3-8; X is a group of formula IV [R1 and R2 are each a (substituted) hydrocarbon group having the number of nuclear atoms of 5-40]}. For example, a compound of formula V. Compounds of formulae I to III are obtained for example, by coupling a halide of an aromatic compound with a halide of a styryl compound through a method such as Grignard reaction.

Excess volumes of mixing of aniline + aromatic hydrocarbons

Abstract: The excess volumes of mixing, VE, of aniline with benzene, toluene, o-xylene, m-xylene and p-xylene have been measured at temperatures 293.15, 298.15, 303.15 and 308.15 K over the whole composition range. The results indicate very weak electron donor–acceptor type interactions in these binary liquid mixtures. The shape and size of the aromatic hydrocarbon are responsible for stretching or breaking of hydrogen bonding in aniline.

Method for catalytically converting lignin into aromatic hydrocarbon by using two-step process

Abstract: The invention discloses a method for catalytically converting lignin into aromatic hydrocarbon by using a two-step process. The method comprises the steps of (a) carrying out hydrogenolysis on lignin in a polar solvent under the actions of a hydrodepolymerization catalyst and hydrogen pressure to obtain a phenol and oil mixture; and (b) carrying out rotary evaporation on the phenol and oil mixture obtained in the step (a), and carrying out hydrodeoxygenation reaction under the conditions of a hydrodeoxygenation catalyst, a solvent, high temperature and low pressure to obtain an aromatic hydrocarbon product. The invention also provides the hydrodepolymerization catalyst and the hydrodeoxygenation catalyst. According to the method, the cheap lignin is used as a raw material and is efficiently converted into the aromatic hydrocarbon under a mild reaction condition by using the two-step process, so that the aromatic hydrocarbon serving as a product is high in economic value, the reaction process is environmental friendly, and the method has wide application prospect.

Positive resist composition

Abstract: PROBLEM TO BE SOLVED: To provide a positive resist composition or the like capable of producing a resist pattern with good line edge roughness.SOLUTION: A positive resist composition contains: a resin having an acid-labile group and which is insoluble or poorly soluble in an alkali aqueous solution but becomes soluble in an alkali aqueous solution by the action of an acid; an acid generator; and a compound represented by the formula (I), where Rrepresents a hydroxy group, an alkyl group, an alicyclic hydrocarbon group, or an aromatic hydrocarbon group, and the alicyclic hydrocarbon group or the aromatic hydrocarbon group may be replaced by the hydroxy group or the alkyl group; Xrepresents a divalent saturated hydrocarbon group, and -CH- in the divalent saturated hydrocarbon group may be replaced by -O- or -CO-; Rrepresents a saturated hydrocarbon group; u1 represents an integer of 0 to 2, s1 represents 1 or 2, t1 represents 0 or 1 with the proviso that the sum of s1 and t1 is 1 or 2.