Abstract: Energy efficient optoelectronic devices include an electroluminescent layer containing a polymer made up of structural units of formula I and II; wherein R1 and R2 are independently C22-44 hydrocarbyl, C22-44 hydrocarbyl containing one or more S, N, O, P, or Si atoms, oxaalkylaryl, or a combination thereof; R3 and R4 are independently H, C1-44 hydrocarbyl or C1-44 hydrocarbyl containing one or more S, N, O, P, or Si atoms, or R3 and R4, taken together, form a C2-10 monocyclic or bicyclic ring containing up to three S, N, O, P, or Si heteroatoms; and X is S, Se, or a combination thereof.

Abstract: In an embodiment, an assembly, comprising: a glazing layer; a light absorbing layer; and a thermo-responsive layer between the glazing layer and the light absorbing layer. The thermo-responsive layer comprises a matrix polymer having a glass transition temperature and an inorganic filler, wherein the matrix polymer comprises 0.5 to 10 weight percent of repeat units derived from acrylonitrile, based upon a total weight of the matrix polymer. The refractive indices of the matrix polymer and the inorganic filler differ by less than or equal to 0.05 at 25° C.

Abstract: In an embodiment, an assembly comprises: a glazing layer; a light absorbing layer; and a thermo-responsive layer between the glazing layer and the light absorbing layer, wherein the thermo-responsive layer comprises a matrix polymer having a glass transition temperature and an inorganic filler having a particle size, wherein refractive indices of the matrix polymer and the inorganic filler differ by less than or equal to 0.05 at 25° C. In an embodiment, a method of making the assembly comprises: forming the glazing layer; forming the light absorbing layer; and forming the thermo-responsive layer between the glazing layer and the light absorbing layer, wherein the thermo-responsive layer comprises a matrix polymer having a glass transition temperature and an inorganic filler having a particle size, wherein refractive indices of the matrix polymer and the inorganic filler differ by less than or equal to 0.05 at 25° C.

Abstract: An optical article comprising a primary mark disposed on the optical article and a secondary mark disposed on the optical article in close proximity to the primary mark. The primary mark comprises a first optical-state change material and the secondary mark comprises a second optical-state change material. The optical article is transformed from a pre-activated state to an activated state when a localized authorized activation method is used that selectively activates the primary mark. The optical article is transformed from a pre-activated state to an deactivated state when a non-localized unauthorized activation method is used that activates the secondary mark along with the primary mark resulting in the second optical-state change material undergoing a reverse color change when compared to the first optical-state change material. An optical article with a single mark including multiple color change optical-state change material is also disclosed.

Abstract: Energy efficient optoelectronic devices include an electroluminescent layer containing a polymer made up of structural units of formula I and II; wherein R1 and R2 are independently C22-44 hydrocarbyl, C22-44 hydrocarbyl containing one or more S, N, O, P, or Si atoms, oxaalkylaryl, or a combination thereof; R3 and R4 are independently H, C1-44 hydrocarbyl or C1-44 hydrocarbyl containing one or more S, N, O, P, or Si atoms, or R3 and R4, taken together, form a C2-10 monocyclic or bicyclic ring containing up to three S, N, O, P, or Si heteroatoms; and X is S, Se, or a combination thereof.

Abstract: An organic light emitting device comprises an outcoupling layer having relatively high aspect ratio nanowires imbedded within an optically thick transparent high optical index film. The incorporation of nanowires increases the optical index of a light emitting assembly and provides a means for extracting light from a light emitting assembly of the organic light emitting device.

Abstract: An organic light emitting device comprises an outcoupling layer having relatively high aspect ratio nanowires imbedded within an optically thick transparent high optical index film. The incorporation of nanowires increases the optical index of a light emitting assembly and provides a means for extracting light from a light emitting assembly of the organic light emitting device.

Abstract: Polyfluorene polymers and copolymers having substantial amounts (10-100%) of fluorenes coupled at the 2 and 5 positions of fluorene are useful as active layers in OLED devices where triplet energies >2.10 eV are required.

Abstract: Polyfluorene polymers and copolymers having substantial amounts (10-100%) of fluorenes coupled at the 2 and 5 positions of fluorene are useful as active layers in OLED devices where triplet energies >2.10 eV are required.

Abstract: Polyfluorene polymers and copolymers having substantial amounts (10-100%) of fluorenes coupled at the 2 and 5 positions of fluorene are useful as active layers in OLED devices where triplet energies >2.10 eV are required.

Abstract: Polyfluorene polymers and copolymers having substantial amounts (10-100%) of fluorenes coupled at the 2 and 5 positions of fluorene are useful as active layers in OLED devices where triplet energies >2.10 eV are required.

Abstract: Polyfluorene polymers and copolymers having substantial amounts (10-100%) of fluorenes coupled at the 2 and 5 positions of fluorene are useful as active layers in OLED devices where triplet energies >2.10 eV are required.

Abstract: Polyfluorene polymers and copolymers having substantial amounts (10-100%) of fluorenes coupled at the 2 and 5 positions of fluorene are useful as active layers in OLED devices where triplet energies >2.10 eV are required.

Abstract: Polyfluorene polymers and copolymers having substantial amounts (10-100%) of fluorenes coupled at the 2 and 5 positions of fluorene are useful as active layers in OLED devices where triplet energies >2.10 eV are required.

Abstract: An optical article comprising a primary mark disposed on the optical article and a secondary mark disposed on the optical article in close proximity to the primary mark. The primary mark comprises a first optical-state change material and the secondary mark comprises a second optical-state change material. The optical article is transformed from a pre-activated state to an activated state when a localized authorized activation method is used that selectively activates the primary mark. The optical article is transformed from a pre-activated state to an deactivated state when a non-localized unauthorized activation method is used that activates the secondary mark along with the primary mark resulting in the second optical-state change material undergoing a reverse color change when compared to the first optical-state change material. An optical article with a single mark including multiple color change optical-state change material is also disclosed.

Abstract: A method for preparing a molded article includes the steps of (a) obtaining a polycarbonate resin and (b) molding the polycarbonate resin. The polycarbonate resin is made by a transesterification reaction using an activated diaryl carbonate such that the polycarbonate is susceptible to the formation of internal ester linkages (IEL). The method occurs with the proviso that the polycarbonate resin, the molding conditions or both are selected to control the amount of IEL formed during the molding process to a level of less than 0.4 mol %.

Abstract: Polycarbonates incorporating terminal carbonate groups derived from ester-substituted activated carbonates in a transesterification process have unfavorable properties with respect to color, hydrolytic stability and thermal stability, particularly when the polycarbonate containing such end groups is molded. The number of activated carbonate end groups formed during the melt transesterification formation of polycarbonate can be reduced by reacting a dihydroxy compound with an activated diaryl carbonate in the presence of an esterification catalyst to produce a polycarbonate, in the presence of a monohydroxy chainstopper such as para-cumyl phenol in an amount that results in 35 to 65 mol % of the end groups being derived from the monohydroxy chainstopper. Suitably, the reactants are provided such that the molar ratio of activated diaryl carbonate to the total of dihydroxy compound plus ½ the chainstopping reagent that is less than 1.

Abstract: A method of replacing slot armor and slot liners in radial slots of generator rotors comprising: (a) removing a winding from respective radial slots in the generator rotor; (b) removing existing slot armors and slot liners from each of the radial slots in the generator rotor; (c) installing a pair of L-shaped slot armor components in each radial slot, each L-shaped armor component constructed of a powder-coated metal; and (d) installing a winding in the radial slots, wherein the L-shaped slot armor components substantially fill any space between the winding and adjacent walls of the radial slots.

Abstract: Polycarbonates incorporating terminal carbonate groups derived from ester-substituted activated carbonates, for example terminal methyl salicyl carbonate (TMSC) derived from the use of BMSC as the activated carbonate in a transesterification process, have unfavorable properties with respect to color, hydrolytic stability and thermal stability, particularly when the polycarbonate containing such end groups is molded. The number of activated carbonate end groups formed during the melt transesterification formation of polycarbonate can be reduced, however, without sacrificing the benefits of using an activated diaryl carbonate, and without requiring a separate reaction or additional additives by reacting a dihydroxy compound with an activated diaryl carbonate in the presence of an esterification catalyst to produce a polycarbonate, wherein the molar ratio of activated diaryl carbonate to dihydroxy compound is less than 1 when expressed to at least three decimal places, for example 0.996 or less.

Abstract: This invention relates to an extrusion method preparing polycarbonates from a solution of an oligomeric polycarbonate. A mixture of bis(methyl salicyl)carbonate (BMSC), BPA and a transesterification catalyst are first equilibrated at moderate temperatures to provide a solution of polycarbonate oligomer in methyl salicylate. The solution is then fed to a devolatilizing extruder, where the polymerization reaction is completed and the methyl salicylate solvent is removed. The solution comprising the oligomeric polycarbonate can also be pre-heated under pressure to a temperature above the boiling point of methyl salicylate and subsequently fed to a devolatilizing extruder equipped for rapid flashing off the solvent. The method provides polycarbonate with greater efficiency than the corresponding process in which unreacted monomers are fed to the extruder. Additionally, the method of the invention does not require the isolation of a precursor polycarbonate comprising ester-substituted phenoxy terminal groups.