Abstract: The present invention relates to the improvement of organic electronic devices, in particular electroluminescent devices, by using compounds which can have a plurality of isomers, where one of these isomers is present in excess.

Abstract: A coordination polymer includes a plurality of metal atoms or metal clusters linked together by a plurality of organic linking ligands. Each linking ligand comprises a residue of a negatively charged polydentate ligand. Characteristically, the plurality of multidentate ligands include a first linking ligand having first hydrocarbon backbone and a second ligand having a second hydrocarbon backbone. The first hydrocarbon backbone is different than the second hydrocarbon backbone.

Abstract: According to the present invention, when cycloolefins are produced by partially hydrogenating a monocyclic aromatic hydrocarbon with hydrogen in the presence of a ruthenium catalyst, water, and a metal sulfate, the decrease in catalytic activity and cycloolefin selectivity is suppressed by reducing the concentration of chloride ions dissolved in the water in which the catalyst is present to 300 wt ppm or less and regenerating a part or all of the catalyst for reuse. Zinc sulfate is preferably used as the metal sulfate. Further, the raw materials and catalyst to be supplied to the reaction preferably have a reduced chloride ion content. This method can suppress the decrease in long-term catalytic activity and cycloolefin selectivity. Furthermore, the catalytic activity and cycloolefin selectivity after catalyst regeneration can be maintained at a high level. As a result, cycloolefins can be efficiently produced for a long period of time.

Abstract: Deaggregated substituted and unsubstituted polyparaphenylenes, polyparaphenylevevinyles, polyanilines, polyazines, polythiophenes, poly-p-phenylene sulfides, polyfuranes, polypyrroles, polyselenophene, polyacetylenes formed from soluble precursors and combinations thereof and copolymers thereof and methods of fabrication are described. The deaggregated polymer molecules when subsequently doped show higher electrical conductivity. Agents such as lithium chloride, m-cresol and nonylphenol are used to deaggregate the polymer molecules. The deaggregating agents can be added prior to or during doping the molecules.

Abstract: A composition that may be useful for thermoforming and blow molding applications comprises a metallocene catalyzed propylene-ethylene random copolymer having an ethylene content of from about 0.1 to about 1.5 weight percent based on the copolymer, and exhibits a flexural modulus of at least about 1,100 MPa, a haze of less than about 40 percent, a melt flow of from about 1.0 dg/min to about 3.0 dg/min, and a xylene solubles content from about 0.2 weight percent to about 1.0 weight percent based on the copolymer. A process for preparing the copolymer and articles prepared therefrom are also disclosed. The composition's properties may make it particularly desirable for applications such as bottles, syringes and containers such as those used for food and medical purposes.

Abstract: The invention concerns novel cytosine based modules and in particular their application in linear multiple hydrogen bonded arrays to form supramolecular polymers of the formula (II): and the use of these in supramolecular materials.

Abstract: The present invention relates to fibers comprising polyareneazole polymer having pendant hydroxyl groups and cations.

Abstract: Multifunctional reactive polymers created by chemical vapor deposition (CVD) and methods of making such polymeric systems are provided. Such polymers provide multifunctional surfaces which can present two or more different molecules (e.g. biological ligands) in controlled ratios. Polymers may include compositional gradients allowing attached ligands to be presented as continuous gradients across a surface. The polymer compositions are modularly designable and applicable to a wider range of applications, including biomedical devices and diagnostic systems.

Abstract: The present invention is directed to a lightweight, gas-filled, highly insulative cellular structure and methods for manufacturing the cellular structure. The cellular structure can be incorporated into outdoor gear and apparel to make the outdoor gear or apparel warm, while still maintaining a desired thinness and flexibility. The insulative article takes advantage of the superior insulative properties of dry gases and preferably highly insulative gases such as argon. In addition, the size and shape of the cells in the cellular structure are selected to minimize convection.

Abstract: A method of synthesizing a poly(9,9-disubstituted-fluorene) includes reacting a 9,9-disubstituted-fluorene with an alkyl lithium in the presence of a catalytic amount of a nickel amine complex. The 9,9-disubstituted-fluorene includes solubility-enhancing substituents in the 9-position and leaving groups in the 2-position and the 7-position. The product poly(9,9-disubstituted-fluorene)s are fluorescent conjugated polymers that are useful as, for example, blue light-emitting materials.

Abstract: The present invention relates to propylene based copolymers and to processes for producing propylene based copolymers, particularly propylene-ethylene copolymers. These unique copolymers are prepared using metallocene catalysts.

Abstract: Water-soluble fluorescent particles are formed in a simple process. A mixture comprising a solvent, water, a fluorescent polymer dissolved in the solvent, and an amphiphilic molecule is provided. The fluorescent polymer comprises a hydrophobic segment. The amphiphilic molecule comprises hydrophilic and hydrophobic segments. The solvent is removed from the mixture to allow the fluorescent polymer and the amphiphilic molecule to entangle in the presence of water, thus forming the water-soluble fluorescent particles. In the formed particles, the hydrophilic segments of the amphiphilic molecule are entangled with one another, and the hydrophobic segments of the fluorescent polymer and amphiphilic molecule are entangled with one another. The amphiphilic molecule encapsulates the fluorescent polymer and at least some of the hydrophilic segments are exposed to render the particle soluble in water.

Abstract: A benzoxazole resin precursor comprising a first repeating unit which is obtained by the reaction of a bisaminophenol compound and a dicarboxylic acid compound, at least one of which has the diamondoid structure; a benzoxazole resin precursor further comprising a second repeating unit which is obtained by the reaction of a bisaminophenol compound having no diamondoid structure and a dicarboxylic acid compound having no diamondoid structure; a polybenzoxazole resin obtained by the ring-closing reaction with dehydration of the above benzoxazole resin precursor; a resin film constituted with the benzoxazole resin precursor or the polybenzoxazole resin. A polybenzoxazole resin and a resin film having excellent heat resistance and a small permittivity and a semiconductor device using the resin film can be obtained from the benzoxazole resin precursor.

Abstract: An object of the present invention is to provide white colored fine particles with high white reflectance and not easily precipitating in a dispersion medium compared to inorganic white pigments, a method of producing the fine particles, an image display medium and an image display apparatus having a high whiteness like a paper and an excellent display memorability using the fine particles. Therefore, the fine particles contain a polymer of a compound expressed by the following formula (1). In the above formula (1), R represents a hydrogen atom, a halogen atom, an alkyl group or an alkenyl group, “m” represents an integer of 1 to 10, and at least one of R represents the alkenyl group.

Abstract: The present invention relates to compounds of the formula (1) and to the use thereof in organic electroluminescent devices. The compounds of the formula (1) are used as host material or dopant in the emitting layer and/or as hole-transport material and/or as electron-transport material.

Abstract: The present invention describes chemicals that have certain properties which cause them to be free or substantially free from endocrine disruptive activity. As a result, the chemicals are useful in producing plastic materials that may be used in products which are exposed to individuals in which endocrine disruptive activity is particularly disadvantageous, such as baby bottles, baby toys, food containers, medical containers, animal cages and medical products. The chemicals may also be useful as additives which are used in food products that are ingested by individuals in which endocrine disruptive activity is particularly disadvantageous, such as newborns or the physically infirm.

Abstract: An endodontic device includes a thermoplastic polymer having a polymer backbone having arylene or heteroarylene moieties joined together by covalent bonds between ring carbon atoms.

Abstract: A compound for an organic EL device as a light-emitting material for use in an organic EL device is provided. The compound includes a polymer molecule containing a light-emitting molecule for determining a luminescent color region of the light-emitting material, and molecules represented by Formulas (1) to (4) as constituent units.

Abstract: A copolymer having monomer units derived from ethylene and monomer units derived from an ?-olefin of 3 to 20 carbon atoms, a density of 906 to 970 kg/m3 and an activation energy of flow of 50 kJ/mol or more, and satisfying specific relations among a melt complex viscosity, a melt flow rate and a characteristic relaxation time.

Abstract: An ethylene (co)polymer of the present invention is a (co)polymer with excellent moldability and mechanical properties and either an ethylene homopolymer or a copolymer of ethylene and an ?-olefin of 4 to 20 carbon atoms. The (co)polymer has methyl branches measured by 13C-NMR less than 0.1 in number per 1,000 carbon atoms and Mw/Mn measured by GPC not lower than 1.8 and lower than 4.5. The (co)polymer is either an ethylene homopolymer or a copolymer of ethylene and an ?-olefin of 3 to 20 carbon atoms. The melt tension (MT) and the swell ratio (SR) satisfy the relation; log(MT)>12.9?7.15×SR; and the intrinsic viscosity ([?]) and the melt flow rate (MFR) satisfy the relation; [?]>1.85×MFR?0.192 in the case of MFR?1 and the relation; [?]>1.85×MFR?0.213 in the case of MFR?1. Such an ethylene (co)polymer can be usable for various molding applications and especially suitable for pipes.

Abstract: An ethylene-?-olefin copolymer having monomer units derived from ethylene and monomer units derived from an ?-olefin of 3 to 20 carbon atoms, a density of 906 to 970 kg/m3, an activation energy of flow of 50 kJ/mol or more and a heat quantity of fusion of a cold xylene soluble part of 30 J/g or more, and satisfying specific relations among a rate of the cold xylene soluble part in the copolymer, the density, a melt flow rate and a characteristic relaxation time.

Abstract: A process is provided comprising contacting 1,3-propanediol with a suitable polymerization catalyst to produce polytrimethylene ether glycol or random polytrimethylene ether ester, wherein the 1,3-propanediol comprises about 10 microg/g or less peroxide compounds, based on the weight of 1,3-propanediol, and about 100 microg/g or less carbonyl compounds based on the weight of the 1,3-propanediol. Preferably, the 1,3-propanediol comprises about 100 microg/g or less of monofunctional alcohol compounds based on the weight of the PDO. In addition, polytrimethylene ether glycol and random polytrimethylene ether ester prepared by the process.

Abstract: The present invention provides a radiation-curable prepolymer. The radiation-curable prepolymer of the invention is prepared by reacting an isocyanate-capped polyurethane with an ethylenically unsaturated amine or an ethylenically unsaturated monohydroxy compound or a mixture thereof, wherein the isocyanate-capped polyurethane is a copolymerization production of: (a) at least one polyalkylene glycol; (b) at least one branching agent having at least three hydroxy groups; and (c) at least one di- or polyisocyanate. The radiation-curable prepolymer of the invention can find use in economically producing contact lenses which have durable, highly elastic soft contact lenses with desired physical properties. In addition, the present invention provides method for making a radiation-curable prepolymer of the invention and for making a medical device, preferably an ophthalmic device, more preferably a contact lens.

Abstract: An ethylene-based polymer which is an ethylene/C4 to C10 ?-olefin copolymer and satisfies the following requirements [k1] to [k3]: [k1] melt flow rate (MFR) under a loading of 2.16 kg at 190° C. is in the range of 1.0 to 50 g/10 minutes; [k2] LNR defined as a scale of neck-in upon film molding is in the range of 0.6 to 1.4; and [k3] take-up speed at break [DS (m/min)] at 160° C. and melt flow rate (MFR) satisfy the following relationship (Eq-1): 12×MFR0.577?DS?165×MFR0.577 (Eq-1), and a thermoplastic resin composition containing the ethylene-based polymer, provide a molded product, preferably a film, excellent in moldability and mechanical strength.

Abstract: Polymer blend compositions of a first polymer component comprising an ethylene propylene copolymer and a second polymer component comprising an isotactic polypropylene copolymer. The first polymer component has a uniform distribution of both tacticity and comonomer between copolymer chains. Further, the first polymer component will exhibit a statistically insignificant intramolecular difference of tacticity.

Abstract: A propylenic polymer according to the present invention or a composition thereof have an excellent melt flowability and contains a less amount of stickiness-causing components, and also has a low modulus and is pliable, and is capable of providing a transparent molded article, thus being useful as a substitute for a pliable vinyl chloride resin. In addition, a molded article made therefrom exhibits an excellent heat seal performance at a low temperature, and is excellent in terms of transparency and rigidity. Specifically, it has an isotactic pentad fraction (mmmm), which indicates a stereoregulariry, of 30 to 80%, a molecular weight distribution (Mw/Mn) of 3.5 or less and an intrinsic viscosity [?] of 0.8 to 5 dl/g.

Abstract: A process for polymerizing 1-butene, optionally with up to 30% by mol of ethylene, propylene or an alpha olefin of formula CH2?CHT wherein T is a C3–C10 alkyl group, in the presence of a catalyst system obtainable by contacting a metallocene compound having C1 symmetry with an alumoxane and/or a compound capable of forming an alkyl metallocene cation.

Abstract: The present invention provides, as a resin bead which can be developed for use completely different from the use of conventional polystyrene resin beads, a porous resin bead made from a styrene-hydroxystyrene-divinylbenzene copolymer, which contain a hydroxyl group in an amount of 10–1000 ?mol/g, and further, a production method of a porous resin bead made from a styrene-hydroxystyrene-divinylbenzene copolymer, which contains suspension copolymerization of a styrene monomer, an acyloxystyrene monomer and a divinylbenzene monomer using an organic solvent (containing at least hydrocarbon and alcohol) and water, followed by hydrolysis reaction.

Abstract: The energy levels (HOMO, LUMO) of the conjugated polymer are tuned independently, so that an energy match on both sides of the device can be accomplished while keeping the emission color in the blue region. Such polymers can be formed by polymerization of a mixture of monomers. The mixture of the monomers contains at least one monomer having an electron-deficient group sandwiched by two aromatic hydrocarbon groups (“Monomer (I)”) and at least one hole transporting (“HT”) monomer. The mixture of monomers may also contain a solubility enhancement (“SE”) monomer and/or a Branching Monomer. Such polymers can be used in fabricating light emitting diodes to achieve some of the best device performance to date including high efficiency and blue color purity.

Abstract: The invention provides an ethylene-?-olefin copolymer which is superior in extrusion molding processability. The present invention is to provide a copolymer of ethylene and ?-olefin of from 4 to 20 carbon atoms, having melt flow rate of from 1 to 100 g/10 min, an activation energy for melt flow of 60 kJ/mol or more, melt tension at 190° C. (MT), intrinsic viscosity ([?]) and a chain length A which satisfy the formula (1) to (3), wherein the chain length A is a chain length at peak position of a logarithm normal distribution curve of a component having the highest molecular weight among logarithm normal distribution curves obtained by dividing a chain length distribution curve obtained by gel permeation chromatography measurement into at least two logarithm normal distribution curves.

Abstract: Methods of synthesizing a substantially monodispersed mixture of polymers comprising polyethylene glycol moieties include: reacting a substantially monodispersed mixture of compounds having the structure of Formula I: R1(OC2H4)n—O?X+ ??(I) wherein R1 is H or a lipophilic moiety; n is from 1 to 25; and X+ is a positive ion, with a substantially monodispersed mixture of compounds having the structure of Formula II: R2(OC2H4)m—OMs ??(II) wherein R2 is H or a lipophilic moiety; and m is from 1 to 25, under conditions sufficient to provide a substantially monodispersed mixture of polymers comprising polyethylene glycol moieties and having the structure of Formula III: R2(OC2H4)m+n—OR1 . ??(III) Substantially monodispersed mixtures of polymers comprising polyethylene glycol moieties are also disclosed.

Abstract: The present invention provides a composition comprising: (a) thermosetting component comprising (1) optionally monomer of Formula I as set forth below and (2) at least one oligomer or polymer of Formula II set forth below where E is a cage compound (defined below); each Q is the same or different and selected from aryl, branched aryl, and substituted aryl wherein the substituents include hydrogen, halogen, alkyl, aryl, substituted aryl, heteroaryl, aryl ether, alkenyl, alkynyl, alkoxyl, hydroxyalkyl, hydroxyaryl, hydroxyalkenyl, hydroxyalkynyl, hydroxyl, or carboxyl; G is aryl or substituted aryl where substituents include halogen and alkyl; h is from 0 to 10; i is from 0 to 10; j is from 0 to 10; and w is 0 or 1; (b) adhesion promoter comprising compound having at least bifunctionality wherein the bifunctionality may be the same or different and the first functionality is capable of interacting with the thermosetting component (a) and the second functionality is capable of interacting with a substrate whe

Abstract: Novel compounds acetoxymethylacenaphthylene and hydroxymethylacenaphthyleneare disclosed. A polymer prepared from these novel compounds containing a structural unit of the formula (3), wherein R1 is a hydrogen atom and R2and R3 individually represent a monovalent atom or a monovalent organic group is also disclosed. The polymer is suitable as a component for an antireflection film-forming composition exhibiting a high antireflection effect and not causing intermixing with a resist film.

Abstract: A process for working up a liquid reaction discharge of the cationic polymerization of isobutene, which substantially comprises polyisobutene, unconverted isobutene and an inert diluent, in which the reaction discharge is heated and is let down into a flash container, is described, the reaction discharge separating, as a result of the flashing, into a polyisobutene-containing liquid phase and a gas phase containing the main amount of the isobutene contained in the reaction discharge and of the diluent.

Abstract: The present invention relates to compositions and processes for producing borohydride compounds. In particular, the present invention provides efficient processes and compositions for the large-scale production of borohydride compounds.

Abstract: The present invention provides a composition comprising: (a) thermosetling component comprising (1) optionally at least one monomer of Formula I as sel forth below and (2) at least one oligomer or polymer of Formula II set forth below where E is a cage compound (defined below); each Q is the same or different and selected from hydrogen, aryl, branched aryl, and substituted aryl wherein the substituents include hydrogen, halogen, alkyl, aryl, substituted aryl, heteroaryl, aryl ether, alkenyl, alkynyl, alkoxyl, hydroxyalkyl, hydroxyaryl, hydroxyalkenyl, hydroxyalkynyl, hydroxyl, or carboxyl; Gw is aryl or substituted aryl where substituents include halogen and alkyl; h is from 0 to 10; i is from 0 to 10; j is from 0 to 10; and w is 0 or 1; adhesion promoter comprising compound having least bifunctionality wherein the bifunctionality may be the same or different and the first functionality is capable of interacting with the thermosetting component (a) and the second functionality is capable of interacting with

Abstract: The present invention provides a radiation-curable prepolymer. The radiation-curable prepolymer of the invention is prepared by reacting an isocyanate-capped polyurethane with an ethylenically unsaturated amine or an ethylenically unsaturated monohydroxy compound or a mixture thereof, wherein the isocyanate-capped polyurethane is a copolymerization production of: (a) at least one polyalkylene glycol; (b) at least one branching agent having at least three hydroxy groups; and (c) at least one di- or polyisocyanate. The radiation-curable prepolymer of the invention can find use in economically producing contact lenses which have durable, highly elastic soft contact lenses with desired physical properties. In addition, the present invention provides method for making a radiation-curable prepolymer of the invention and for making a medical device, preferably an ophthalmic device, more preferably a contact lens.

Abstract: A method for functionalizing a crosslinked polymer bead. The method comprises the steps of: (a) swelling the bead in a first solvent or solvent mixture to a volume from 200% to 310% of its volume when dry; and (b) contacting the bead with a functionalizing reagent in a second solvent or solvent mixture capable of swelling the bead to a volume from 200% to 310% of its volume when dry.

Abstract: Anionic polymerization initiators useful in the preparation of polymers having a protected amine functional group. The amine functionality includes a first protecting group, which can be aralkyl, methyl, allyl or tertiary alkyl group. The other of the amine protecting groups can be the same as the first protecting group. Alternatively, the second protecting group can be different from the first protecting group, in which case it is selected to have differential stability to agents used to remove the aralkyl, methyl, allyl or tertiary alkyl protecting group.

Abstract: An ethylene copolymer is provided which is a copolymer of ethylene and an ?-olefin of 3 to 20 carbon atoms and has the following properties: (a) the melt index (MI2) at 190° C. under a load of 2.16 kg is in the range of 0.0001 to 1000 g/10 min, (b) the density is not more than 0.899 g/cm3, (c) the relationship between a vinyl group amount and MI2 of the polymer satisfies the following expression: (vinyl group amount: number of vinyl groups/1000 carbon atoms)?0.004509+0.000815×log(MI2), and (d) the relationship between a vinylidene group amount and MI2 of the polymer satisfies the following expression: (vinylidene group amount: number of vinylidene groups/1000 carbon atoms)?0.013528+0.002445×log(MI2).

Abstract: Methods of synthesizing a substantially monodispersed mixture of polymers comprising polyethylene glycol moieties include: reacting a substantially monodispersed mixture of compounds having the structure of Formula I: R1(OC2H4)n—O−X+  (I) wherein R1 is H or a lipophilic moiety; n is from 1 to 25; and X+ is a positive ion,  with a substantially monodispersed mixture of compounds having the structure of Formula II: R2(OC2H4)m—OMs  (II) wherein R2 is H or a lipophilic moiety; and m is from 1 to 25, under conditions sufficient to provide a substantially monodispersed mixture of polymers comprising polyethylene glycol moieties and having the structure of Formula III: R2(OC2H4)m+n—OR1  (III).

Abstract: A process for the production of polyacetylene derivatives by which polyacetylene derivatives having an ability to discriminate asymmetry can be easily obtained in a few steps and in high yield and which is also advantageous in respects of economical efficiency, environmental problems, and so on. This process is characterized by polymerizing an acetylene derivative having a hydrophilic functional group in an aqueous solvent in the presence of a water-soluble transition metal complex catalyst and a base.

Abstract: A 2-cyanoacrylate composition useful as an adhesive contains a Lewis acid metal salt comprising a metal such as aluminum, gallium, indium or thalium, and the conjugate base of an acid such as a monohalo-, dihalo- or trihalo-acetate (e.g. aluminum trifluoroacetate salt). A clathrate such as a crown ether is also present.

Abstract: Disclosed are a propylene polymer composition possessing excellent balance among rigidity and low warpage, resistance to deterioration caused by thermal oxidation during processing, weathering resistance, antistatic properties, and low bleeding properties, and a propylene resin composition which can easily produce molded products having excellent balance between rigidity and impact resistance (particularly low-temperature impact resistance) or heat resistance. The propylene polymer composition and the propylene resin composition comprise a propylene block copolymer consisting essentially of the following blocks (a) and (b) and having a melt flow rate of 0.

Abstract: The present invention is a method of making amide and super plastics including the steps of dissolving hydrocarbon feed materials in a molten metal at temperatures above 400° C. and pressures above 400 kg/cm2; increasing the temperature to above 800° C. and the pressure to above 800 kg/cm2 such that the feed material polymerizes together as an amide plastic; separating the amide plastic from the molten metal; and cooling the amide plastic and extracting amide plastic. Preferably wherein the molten metal is tin and the hydrocarbon feed materials are selected from the group comprised of oil, natural gas, sulfides of; sodium, potassium, magnesium, and zinc, salts of; bromine and chlorine, coal oils, propane, nitrogen, oxygen, urea, and hydrocarbon containing refuse.

Abstract: A polymeric fluorescent substance exhibiting fluorescence in solid state. The substance has a polystyrene reduced number-average molecular weight of 5×104 to 1×108, and contains repeating units represented by formula (1) and formula (3):  —Ar3—(CR6═CR7)k—  (3). The polymeric fluorescent substance exhibits particularly strong fluorescence, and a high performance polymer LED which can be driven at low voltage and high efficiency is obtained.

Abstract: Methods of synthesizing a substantially monodispersed mixture of polymers comprising polyethylene glycol moieties include: reacting a substantially monodispersed mixture of compounds having the structure of Formula I: R1(OC2H4)n—O−X+  (I) wherein R1 is H or a lipophilic moiety; n is from 1 to 25; and X+ is a positive ion, with a substantially monodispersed mixture of compounds having the structure of Formula II: R2(OC2H4)m—OMS  (II) wherein R2 is H or a lipophilic moiety; and m is from 1 to 25, under conditions sufficient to provide a substantially monodispersed mixture of polymers comprising polyethylene glycol moieties and having the structure of Formula III: R2(OC2H4)m+n—OR1  (III). Substantially monodispersed mixtures of polymers comprising polyethylene glycol moieties are also disclosed.

Abstract: A golf ball comprising a core, a cover, and at least one water vapor barrier layer, wherein the water vapor barrier layer comprises at least one layer formed from poly-para-xylylene and its derivatives.

Abstract: Novel reactions used to prepare phosphole and bisphosphole compounds are detailed. Novel phosphole compounds and metal coordination compounds of phosphole and bisphosphole compounds are also provided. These metal coordination compounds are useful as catalysts for the polymerization or olefins with carbon monoxide and for the polymerization of acrylic monomers.

Abstract: A copolymer of benzene and substituted benzene, particularly anthracene is disclosed. The copolymer is soluble in common organic solvents like chloroform, methylene chloride, benzene, toluene, dimethylformamide, N-methyl pyrrolidinone etc unlike the parent polymer poly-p-phenylene which is highly insoluble in organic solvents. The copolymer is thermally stable up to 380° C. and environmentally stable for at least 1 year. The copolymer is capable of being thermally evaporated useful for elecroluminescent devices. The copolymer shows electroluminescene and can be used in the fabrication of an organic light emitting diode device.