摘要:
An optical fiber bundle 10 is disclosed including a plurality of polymer optical fibers 12 disposed within a rigid sleeve 14. The fibers have been drawn to a draw ratio of at least 1:1.5 prior to placing them within the sleeve, whereupon the structure 13 is heated to induce elastic relaxation of the fibers which contract in length and expand in girth. The expansion within the rigid sleeve results in a close-packed geometry.
摘要:
A thermally expandable wax composition and its use in polymer-based actuators is disclosed and claimed. The compositions are wax-based and include conductive filler as well as a viscosity modifier to stabilize the composition against segregation. Optionally included are thermoxidative stabilizers.
摘要:
A unitary injection molded waveguiding optical element is disclosed and claimed. In a preferred embodiment, there is shown an NXN star coupler 310 with a plurality of fibers 314, 316 integrally formed with the mixing body. Preferably, the fibers are continuously transitioned to the signal mixing body such that the optical path is substantially constant and the surfaces are free from lateral discontinuities.
摘要:
A process for preparing poly{[benzo (1,2-d:5,4-d')bisthiazole-2,6-diyl]-1,4-phenylene} or one of the reactants used in the preparation of such polymer by the use of an electrolytic cell. In the process, thiocyanate ions are oxidized to thiocyanogen in the anode chamber of the cell. In a preferred embodiment, the cathode chamber of the same electrolytic cell is used to reduce 4,6-dithiocyanobenzene-1,3-diamine to form the dithio radical of 4,6-diaminobenzene-1,3-dithiol. Upon hydrogenation, the dithiol or its acid salt may be used to react with terephthalic acid to form the polymer.
摘要:
This invention provides an electrochemical process for the production of vinyl acetate from ethylene and anolyte acetic acid at a constant anodic half cell potential and under, ambient conditions of temperature and pressure.
摘要:
Process for producing highly stretchable, amorphous anisotropic melt-forming polymers having recurring units derived from p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, at least one aromatic diacid and an aromatic diol and/or hydroxyamine component, at least a portion of which is 4,4'-biphenol, which comprises incorporating into such polymers recurring units derived from resorcinol and at least one additional monomer that provides the resulting polymer with selected meta linkages, wherein each of said recurring units is present in the polymer in specified amounts.
摘要:
Multilayer films that include a thermotropic liquid crystalline polymer film layer and a polyethylene film layer are bound together using one of the following hot melt adhesives: ethylene-glycidyl methacrylate copolymer, ethylene-methyl acrylate-glycidyl methacrylate terpolymer, ethylene vinyl acetate copolymer, a polyolefin blend, ethylene-acrylic acid copolymer, and mixtures thereof.
摘要:
In one embodiment this invention provides a tunable laser device which is characterized by a dye laser medium which consists of a porous glass matrix containing an incorporated solution of a lasing dye, and which is adapted to operate continuously in combination with an optical pumping means.
摘要:
Provided is an archival recording medium and a method for recording information on same. The recording medium comprises a microporous polymeric layer and an energy-absorbing material, e.g., a layer of an energy-absorbing material such as a metal or dye/polymer layer deposited on the microporous layer. If desired, further dimensional stability and mechanical strength can be provided by a thermally stable substrate or by tensioning the medium within a rigid frame. Information is recorded by the energy-absorbing material heating up in localized irradiated regions and causing the controlled collapse of the microporous structure in the microporous polymer layer. The collapsed portions of the structure constitute the information which can then be read either by reflectance or transmission.
摘要:
Provided is an information recording medium and a method for recording information thereon. The information layer of the recording medium comprises a naphthalocyanine chromophore, e.g., a sulfonamidonaphthalocyanine having silicon or germanium as the central hetero atom. Information can thereby be readily recorded via a thermal deformation technique due to the effective absorption by the dye of light in the wavelength range of about 760-850 nm. The naphthalocyanine chromophores exhibit excellent chemical and photolytic stability, their use thereby increasing the useful life of the recording medium.Provided herein are also novel naphthalocyanine chromophore compounds which are useful in optical recording media, and which exhibit exceptional solubility characteristics. Such chromophores are thereby readily applied as a film in the formulation of an information recording medium.