Abstract: Gas sensors are provided. The gas sensors comprise: a substrate; a plurality of electrodes on the substrate; and a polymeric sensing layer on the substrate for adsorbing a gas-phase analyte. The adsorption of the analyte is effective to change a property of the gas sensor that results in a change in an output signal from the gas sensor. The polymeric sensing layer comprises a polymer chosen from substituted or unsubstituted polyarylenes comprising the reaction product of monomers comprising a first monomer comprising an aromatic acetylene group and a second monomer comprising two or more cyclopentadienone groups, or a cured product of the reaction product. The gas sensors and methods of using such sensors find particular applicability in the sensing of gas-phase organic analytes.

Abstract: Disclosed is a coating comprising a polymeric layer, wherein the polymeric layer comprises a reaction product of a first monomer comprising two or more aromatic acetylene groups and a second monomer comprising two or more cyclopentadienone groups, or a cured product of the reaction product. The coating may or may not additionally contain a crosslinker and/or a thermal acid generator. Optical thin films made from the coatings exhibit refractive indices that make them useful as interlayers for matching refractive indices between adjacent layers of display devices; thereby improving device output efficiency.

Abstract: Disclosed is a formulation comprising a copolymer comprising one or more high refractive index first monomers and one or more second monomers comprising a reactive side chain and one or more solvents. The formulation may optionally contain additional components. Further disclosed are methods for forming optical thin films from the formulation and optical devices containing the optical thin films.

Abstract: Disclosed is a coating comprising a polymeric layer, wherein the polymeric layer comprises a reaction product of a first monomer comprising two or more aromatic acetylene groups and a second monomer comprising two or more cyclopentadienone groups, or a cured product of the reaction product. The coating may or may not additionally contain a crosslinker and/or a thermal acid generator. Optical thin films made from the coatings exhibit refractive indices that make them useful as interlayers for matching refractive indices between adjacent layers of display devices; thereby improving device output efficiency.

Abstract: Gas sensors are provided. The gas sensors comprise: a substrate; a plurality of electrodes on the substrate; and a polymeric sensing layer on the substrate for adsorbing a gas-phase analyte. The adsorption of the analyte is effective to change a property of the gas sensor that results in a change in an output signal from the gas sensor. The polymeric sensing layer comprises a polymer chosen from substituted or unsubstituted polyarylenes comprising the reaction product of monomers comprising a first monomer comprising an aromatic acetylene group and a second monomer comprising two or more cyclopentadienone groups, or a cured product of the reaction product. The gas sensors and methods of using such sensors find particular applicability in the sensing of gas-phase organic analytes.

Abstract: Certain polyarylene oligomers having improved solubility are useful in forming dielectric material layers in electronics applications.

Abstract: A method of manufacturing a display device is provided which uses a sacrificial layer interposed between a carrier and a display device substrate.

Abstract: A method of forming a pattern by directed self-assembly, comprising: (a) providing a semiconductor substrate comprising one or more layers to be patterned; (b) applying a crosslinkable underlayer composition over the one or more layers to be patterned to form a crosslinkable underlayer, wherein the crosslinkable underlayer composition comprises a crosslinkable polymer comprising a first unit formed from a monomer of the following general formula (I-A) or (I-B): wherein: P is a polymerizable functional group; L is a single bond or an m+1-valent linking group; X1 is a monovalent electron donating group; X2 is a divalent electron donating group; Ar1 and Ar2 are trivalent and divalent aryl groups, respectively, and carbon atoms of the cyclobutene ring are bonded to adjacent carbon atoms on the same aromatic ring of Ar1 or Ar2; m and n are each an integer of 1 or more; and each R1 is independently a monovalent group; (c) heating the crosslinkable underlayer to form a crosslinked underlayer; (d) forming a self-

Abstract: Polyarylenes comprising as polymerized units a first monomer having two cyclopentadienone moieties and a second monomer having two or more alkyne moieties, wherein at least one alkyne moiety is directly bonded to a silicon atom are provided. Such polyarylenes are useful as dielectric materials in the manufacture of electronic devices.

Abstract: A method of separating a secondary alcohol compound from a primary alcohol compound using selective acylation is provided.

Abstract: Polyarylenes comprising as polymerized units a first monomer having two cyclopentadienone moieties and a second monomer having two or more alkyne moieties, wherein at least one alkyne moiety is directly bonded to a silicon atom are provided. Such polyarylenes are useful as dielectric materials in the manufacture of electronic devices.

Abstract: A method of separating a secondary alcohol compound from a primary alcohol compound using selective acylation is provided.

Abstract: A method of manufacturing a display device is provided which uses a sacrificial layer interposed between a carrier and a display device substrate.

Abstract: Certain polyarylene oligomers having improved solubility are useful in forming dielectric material layers in electronics applications.

Abstract: A method of forming a pattern by directed self-assembly, comprising: (a) providing a semiconductor substrate comprising one or more layers to be patterned; (b) applying a crosslinkable underlayer composition over the one or more layers to be patterned to form a crosslinkable underlayer, wherein the crosslinkable underlayer composition comprises a crosslinkable polymer comprising a first unit of the following general formula (I-A) or (I-B): wherein: P is a polymerizable functional group; L is a single bond or an m+1-valent linking group; X1 is a monovalent electron donating group; X2 is a divalent electron donating group; Ar1 and Ar2 are trivalent and divalent aryl groups, respectively, and carbon atoms of the cyclobutene ring are bonded to adjacent carbon atoms on the same aromatic ring of Ar1 or Ar2; m and n are each an integer of 1 or more; and each R1 is independently a monovalent group; (c) heating the crosslinkable underlayer to form a crosslinked underlayer; (d) forming a self-assembling layer compr

Abstract: A crosslinkable polymer comprising: a first unit of the following general formula (I-A) or (I-B): wherein: P is a polymerizable functional group; L is a single bond or an m+1-valent linking group; X1 is a monovalent electron donating group; X2 is a divalent electron donating group; Ar1 and Ar2 are trivalent and divalent aryl groups, respectively, and carbon atoms of the cyclobutene ring are bonded to adjacent carbon atoms on the same aromatic ring of Ar1 or Ar2; m and n are each an integer of 1 or more; and each R1 is independently a monovalent group; and a second unit chosen from general formulae (III) and (IV): wherein R7 is chosen from hydrogen, fluorine, C1-C3 alkyl and C1-C3 fluoroalkyl, R8 is chosen from optionally substituted C1 to C10 alkyl, and Ar3 is an optionally substituted aryl group. Underlayer compositions comprise the crosslinkable polymer and a solvent.

Abstract: Certain polyphenylene oligomers having good solvent strip resistance, low coefficient of thermal expansion and good adhesion to a variety of surfaces are useful as thin-film dielectric materials in electronics applications.

Abstract: A machine for impregnating a die cast metal part with liquid impregnant comprises an impregnation chamber having liquid impregnant in a lower portion, an opening for ingress and egress of the parts being defined in a side wall of the chamber above the liquid impregnant, a door for sealing the opening, a part holder in the chamber and an elevator for positioning parts above the liquid impregnant during evacuation of the chamber and then immersing the parts in the liquid impregnant during subsequent pressurization of the chamber.

Abstract: A machine for impregnating a die cast metal part with liquid impregnant comprises an impregnation chamber having liquid impregnant in a lower portion, an opening for ingress and egress of the parts being defined in a side wall of the chamber above the liquid impregnant, a door for sealing the opening, a part holder in the chamber and an elevator for positioning parts above the liquid impregnant during evacuation of the chamber and then immersing the parts in the liquid impregnant during subsequent pressurization of the chamber.

Abstract: A machine for impregnating a die cast metal part with liquid impregnant comprises an impregnation chamber having liquid impregnant in a lower portion, an opening for ingress and egress of the parts being defined in a side wall of the chamber above the liquid impregnant, a door for sealing the opening, a part holder in the chamber and an elevator for positioning parts above the liquid impregnant during evacuation of the chamber and then immersing the parts in the liquid impregnant during subsequent pressurization of the chamber.