摘要:
Disclosed is a polymer composition (I) 60 to 99.8 wt.% of an amorphous copolymer comprising (a) units derived from perfluoro-2,2-dimethyl-1,3-dixole and (b) units derived from at least one ethylenically unsaturated monomer selected from ethylene, tetrafluoroethylene, chlorotrifluoroethylene, and CF₂=CFOCF₃, and (II) 0.2 to 40 wt.% of a compound having a hydrocarbon group containing at least one fluorine atom and at least one functional group selected from -OH, -SR, -COOH, -SO-, -SO₂-, -CONH-, -COO-CO-, -CONHCO-, -COO-, -CN, -NCO, -CO-, -HCOO-, -NH₂-, -SO₃H, -NHNH₂, -CONH₂, -CH=CH₂, -NH-, (RO) n X 3-n Si-, wherein R is a C₁₋₅ alkyl group, n is 0, 1, 2 or 3 and X is a halogen atom or a C₁₋₅ alkyl group. The polymer composition is useful for a plastic cladding of an optical fiber.
摘要:
Novel optical fiber cladding compositions containing fluorinated acrylamide monomers are described. The claddings are liquids at room temperature which possess excellent coating viscosities in the pre-polymerized state and are polymerized by actinic radiation.
摘要:
The invention provides an optical fiber comprising a cladding and a core wherein the cladding comprises a terpolymer comprising:
(1) about 50 to about 90 mol.% of vinylidene fluoride, (2) about 8 to about 45 mol.% of trifluoroethylene and (3) about 2 to about 15 mol.% of hexafluoropropylene or perfluoro(alkylvinylether).
摘要:
Disclosed is a polymer composition (I) 60 to 99.8 wt.% of an amorphous copolymer comprising (a) units derived from perfluoro-2,2-dimethyl-1,3-dixole and (b) units derived from at least one ethylenically unsaturated monomer selected from ethylene, tetrafluoroethylene, chlorotrifluoroethylene, and CF₂=CFOCF₃, and (II) 0.2 to 40 wt.% of a compound having a hydrocarbon group containing at least one fluorine atom and at least one functional group selected from -OH, -SR, -COOH, -SO-, -SO₂-, -CONH-, -COO-CO-, -CONHCO-, -COO-, -CN, -NCO, -CO-, -HCOO-, -NH₂-, -SO₃H, -NHNH₂, -CONH₂, -CH=CH₂, -NH-, (RO) n X 3-n Si-, wherein R is a C₁₋₅ alkyl group, n is 0, 1, 2 or 3 and X is a halogen atom or a C₁₋₅ alkyl group. The polymer composition is useful for a plastic cladding of an optical fiber.
摘要:
Es wurde ein neues Verfahren zur Herstellung von Lichtleitern auf Basis aromatischer Polycarbonate gefunden, gemäß dem man die Polycarbonatfasern mit einem mit UV-Strahlen polymerisierbaren Gemisch beschichtet, das polyfunktionelle (Meth)Acrylsäurederivate eines speziellen Typs, nämlich der Formel (I), monofunktionelle (Meth)Acrylate eines speziellen Typs, nämlich der Formel (III), und übliche Photoinitiatoren enthält, und dieses Gemisch auf der Faser durch UV-Bestrahlung polymerisiert.
摘要:
An optical sensor which comprises an optical waveguide comprising a cladding (2) and an optical waveguide member (1) made of a transparent elastomer which is surrounded by the cladding and through which light is propagated, wherein an amount of light to be propagated through the waveguide member is changed according to a degree of elastic deformation of the waveguide member, which is not affected byelectr- ical and/or magnetic fields.
摘要:
An optical fibre having good heat resistance, low-temperature resistance, flexural resistance, water absorption resistance and chemical resistance, comprises a core component comprising a polycarbonate or a silica type glass, and a clad component comprising a graft-modified poly (4-methyl-1-pentene) wherein the grafts are formed of unsaturated carboxylic acid or a derivative thereof.
摘要:
A plastic light conduit of cross-linked polymer material having good light transmitting characteristics, without voids or noticeable bubbles, is disclosed. Also disclosed is a method of manufacture and an apparatus, involving progressive heating of reactive monomer mixture in a tube which is submerged in a progressive reactor utilizing cold oil to maintain a cold, non-reacting zone, and hot water to create a hot zone that causes reaction, while simlutaneously carrying away the excess exothermic heat of reaction.
摘要:
The plastic optical fiber of this invention has a core comprising a copolymer which comprises, as the essential constituents, a (meth)acrylic ester I represented by the following formula [I] wherein R₁ denotes hydrogen or methyl; a (meth)acrylic ester II represented by the following formula [II] wherein R2₂denotes hydrogen or methyl, and R₃ denotes C₁-C₈ alkyl, cycloalkyl, or aromatic group; and a multifunctional monomer. The core being formed by heat-curing of the thermosetting resin composition, it provides for a plastic optical fiber with an effect of excellency in the thermal resistance and the mechanical strength. Further, since a fibered polymer can be obtained without a drawing step according to this invention, it gives also an effect of decreasing the light transmission loss caused by a drawing step for plastic optical fibers of the prior art.
摘要:
A core-clad plastic optical fiber is described, comprising a polyglutarimide series polymer having a polymeric structural unit represented by formula (I) wherein R represents a hydrogen atom, an alkyl group, a cycloalkyl group, or an aromatic group and n represents a positive integer, having a thermal deformation temperature of at least 120 °C as a core, and an organic polymer having a refractive index lower than the refractive index of the core as a clad layer, said plastic optical fiber having the characteristic that the light transmission loss measured at 655 nm is not more than 500 dB/km.