Abstract: Provided is a process for producing a copolymer of a diallylamine and sulfur dioxide which copolymer has a higher molecular weight and water-solubility than that obtained by a conventional production process by copolymerizing the diallylamine and sulfur dioxide in the presence of an acid and a radical polymerization initiator in a polar solvent.

Abstract: Poly(glycolide) polymers are disclosed. The polymers generally include a polymerized alkynyl-substituted glycolide having a polymer backbone with one or more alkynyl groups appended thereto. The alkynyl groups provide reactive sites for further functionalization of the polymer, for example by reaction with azide derivatives (e.g., azide-substituted organic compounds). Alkynyl and azide groups react via the “click” chemistry mechanism to form functional groups covalently bonded to the polymer via a triazole link. The polymers are biodegradable and can be used to deliver drugs or other therapeutic substances (e.g., large biomolecules such as single strand RNA) at targeted locations in a patient's body and/or at controlled release rates.

Abstract: The present invention relates to a method for preparing polyarylene sulfide, in which the polyarylene sulfide is prepared by a polymerization reaction of reactants including a diiodo aromatic compound and a sulfur compound, the method including: further adding 0.01 to 10.0 wt. % of diphenyl disulfide with respect to the weight of the polyarylene sulfide to the reactants to form the polyarylene sulfide having a melting point of 265 to 320° C. The diphenyl disulfide included in the reactants according to the present invention costs far less than other conventional polymerization inhibitors to dramatically lower the production cost, and the polyarylene sulfide prepared using the diphenyl disulfide exhibits low iodine content and very excellence in thermal stability.

Abstract: Described herein are improved methods of forming polymer films, the polymer films formed thereby, and electronic devices formed form the polymer films. The methods generally include contacting a polymer with a solvent to at least partially solvate the polymer in the solvent, exposing the at least partially solvated polymer and solvent to ultrasonic energy for a duration effective to form a plurality of ordered assemblies of the polymer in the solvent, and forming a solid film of the polymer, wherein the solid film comprises the plurality of ordered assemblies of the polymer.

Abstract: A method is provided for producing a polyarylene sulfide by reacting a sulfidizing agent with a dihalogenated aromatic compound in an organic polar solvent in the presence of an alkali metal hydroxide, the method includes <Step 1>: carrying out the reaction in such a manner that the polymerization time in a temperature range of 230° C. to less than 245° C. (T1a) is not less than 30 minutes and less than 3.5 hours and that the conversion ratio of the dihalogenated aromatic compound at the end of the step is 70 to 98 mol. % and <Step 2>: carrying out the reaction in such a manner that the polymerization time in a temperature range of 245° C. to less than 280° C. (T2) is not less than 5 minutes and less than 1 hour.

Abstract: According to a preferable embodiment of the present invention, a composition for a resin comprising an inorganic compound having a sulfur atom and/or a selenium atom, an episulfide compound, and a mercaptodisulfide compound can be provided. According to another preferable embodiment of the present invention, a composition for a resin having the viscosity thereof decreased to facilitate a cast polymerization operation and thus to improve the tonality of the obtained optical material can be provided. According to still another preferable embodiment of the present invention, an optical material obtained by curing the above-described composition for a resin and having a high refractive index can be provided.

Abstract: A polyphenylene sulfide resin treated by thermal oxidation has a generated gas amount of 0.23 wt % or less when the resin is heated and melted in vacuum at 320° C. for 2 hours; a residual amount of 3.0 wt % or less as a residue when the resin is dissolved in an amount corresponding to 20 times the weight of the resin, of 1-chloronaphthalene at 250° C. for 5 minutes and, as the 1-chloronaphthalene solution, pressure-filtered in a still hot state by a PTFE membrane filter with a pore size of 1 ?m or less; and a melt flow rate (measured at a temperature of 315.5° C. and at a load of 5000 g according to ASTM D-1238-70) of more than 100 g/10 min to 500 g/10 min.

Abstract: Provided is a thioether-functional, oligomeric polythiol having pendant hydroxyl functional groups, prepared by reacting together: (a) a compound having at least two thiol functional groups; and (b) a hydroxyl functional compound having triple bond functionality. Also provided are optical articles prepared from the reaction product of: (A) a reactive compound having functional groups that are reactive with active hydrogens; (B) a thioether-functional, oligomeric polythiol; and, optionally, (C) a compound different from (B) containing active hydrogens.

Abstract: Provided is a thioether-functional, oligomeric polythiol having pendant hydroxyl functional groups, prepared by reacting together: (a) a compound having at least two thiol functional groups; (b) a hydroxyl functional compound having triple bond functionality; and (c) a compound having at least two double bonds. Further provided is a thioether-functional, oligomeric polythiol having pendant hydroxyl functional groups, prepared by reacting together: (a) a compound having at least two thiol functional groups, prepared by reacting together: (1) a dithiol, and (2) a compound having at least two double bonds; (b) a hydroxyl functional compound having triple bond functionality; and optionally (c) an additional compound having at least two double bonds, which may be the same as or different from the compound (2). Optical articles prepared from the thioether-functional, oligomeric polythiols are also provided.

Abstract: A thiophene compound represented by formula (I): in which: A represents a C2–C5 alkylene bridge; R represents a stereoselectively substituted, linear or branched C2–C24 alkyl, C3–C18 cycloalkyl, C1–C18 alkoxy or polyethyleneoxide group, optionally substituted with at least one substituent selected from the group consisting of an alcohol, amide, ether, ester or sulfonate group; or an optionally substituted aryl group having at least one chiral center substituted at said C2–C5 alkylene bridge; polymers derived therefrom; a process for polymerizing a thiophene according to formula (I), optionally chemically or electrochemically; and dispersions, pastes and layers containing polymers derived therefrom.

Abstract: The invention relates to novel 3,4-alkylenedioxythiophene dimers and trimers, to their preparation and to their use as precursors for conductive polymers.

Abstract: Provided are a polyarylene sulfide having a chloroform soluble content of at most 0.5% by weight and having an inherent viscosity &eegr;inh of from 0.05 to 0.4; a polyarylene sulfide resin composition comprising a polyarylene sulfide and an inorganic filler, of which the chloroform soluble content is at most 0.5% by weight relative to the polyarylene sulfide in the composition; car parts produced through injection molding of the composition; and a method for producing a polyarylene sulfide. The polyarylene sulfide has a reduced content of low-molecular components, and has well balanced properties of fluidity, flexural strength and impact resistance.

Abstract: Copolymers of sulfur dioxide and/or carbon monoxide and olefins, especially ethylene, can be made by contacting these monomers with a combination of selected strong Lewis acid and a selected metal or a compound of a selected metal. The resulting polymers, which are often alternating copolymers, are useful as molding resins.

Abstract: In order to produce a polymer electrolyte membrane from sulfonated, aromatic polyether ketone, an aromatic polyether ketone of the formula (I) ##STR1## in which Ar is a phenylene ring having p- and/or m-bonds,Ar' is a phenylene, naphthylene, biphenylene, anthrylene or another divalent aromatic unit,X, N and M, independently of one another are 0 or 1,Y is 0, 1, 2 or 3,P is 1, 2, 3 or 4,is sulfonated and the sulfonic acid is isolated. At least 5% of the sulfonic groups in the sulfonic acid are converted into sulfonyl chloride groups, and these are reacted with an amine containing at least one crosslinkable substituent or a further functional group, and unreacted sulfonyl chloride groups are subsequently hydrolyzed. The resultant aromatic sulfonamide is isolated and dissolved in an organic solvent, the solution is converted into a film, and the crosslinkable substituents in the film are then crosslinked.In specific cases, the crosslinkable substituents can be omitted.

Abstract: Polyarylene thioether is easily prepared by oxidative polymerizing an aromatic compound of the formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently a hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group, and Y is a hydrogen atom or a group of the formula: ##STR2## wherein R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are independently a hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group and X is --O--, --S--, a methylene group or an ethylene group with a sulfidizing agent in the presence of an acid and an oxidizing agent, or in the presence of an acid, a catalyst for oxidative polymerization and oxygen, or in the presence of a Friedel-Crafts catalyst.

Abstract: A method for preparing functionalized polymers formed by anionic polymerization, e.g., polystyrene, polyisoprene, etc., generally comprising the steps of conducting anionic polymerization, reacting the formed polymer with a sterically hindering compound such as 1,1-diphenylethylene, in the presence of a polar diluent, such as tetrahydrofuran, and then contacting the polymer so formed with CO.sub.2.

Abstract: The invention is a process for preparing linear alternating polymers of sulfur dioxide, ethylene, optionally at least one ethylenically unsaturated hydrocarbon other than ethylene and optionally carbon monoxide having the general formula ##STR1## wherein Z is at least one moiety selected from SO.sub.2 and CO, G is the moiety of at least one ethylenically unsaturated hydrocarbon of at least 2 carbon atoms polymerized through the ethylenic unsaturation, n is an integer of at least 1, and m is an integer of zero or greater, which process comprises contacting sulfur dioxide, ethylene, optionally carbon monoxide, and optionally at least one ethylenically unsaturated hydrocarbon of at least 2 carbon atoms, in the presence of a catalyst obtained from (1) a compound of a Group VIII metal selected from palladium, cobalt and nickel, (2) a bidentate ligand of phosphorus, arsenic, or antimony, and (3) an anion of a non-hydrohalogenic acid having a pKa of less than 6.