POLYMER MIXTURE WITH LINEAR SPECIFIC CRITICAL MIXING TEMPERATURE AND OPTICAL FIBRE TEMPERATURE SENSOR BASED ON THERMORESPONSIVE POLYMERS

摘要

Polymer mixture for fiber-optic temperature measurement in a temperature range from 5 to 95 ° C, comprising a first thermoresponsive polymer, at least one second thermoresponsive polymer, and a solvent and / or swelling agent, the first and the at least second thermoresponsive polymer being water-soluble and hydrogen bridge acceptors, however has no hydrogen bond donors, the first thermoresponsive polymer and the at least second thermoresponsive polymer having different lower critical mixture temperatures or different upper critical mixture temperatures, and the polymer mixture is adapted so that it is at a temperature T above an initial temperature T sub A /sub = 5 ° C and below a final temperature T sub E /sub = 95 ° C has a monotonic course of an optical transparency as a function of the temperature T, so that a measurement of the optical transparency of the polymer mixture an optical determination of the temperature T allowed, where T sub E /sub T T sub A /sub. Use of the described polymer mixture in a fiber-optic measurement system (100, 200, 300) for measuring a temperature, comprising a temperature-sensitive element (101, 201, 301) comprising the polymer blend; at least one light conducting optical fiber (102, 103, 202, 205, 206, 208, 302, 305, 306, 308, 310); a light source (104, 203, 303); and at least one optical detector (105, 207, 209, 309); wherein the temperature-sensitive element is connected to at least one light-conducting optical fiber (102, 103) so that light from the light source can be guided to the temperature-sensitive element and from there to the optical detector, so that a transparency of the temperature-sensitive element that can be changed by the polymer mixture can be detected by the optical detector and is assignable to a temperature on the temperature-sensitive element.Fiber-optic measuring system (100, 200, 300) for measuring a temperature, comprising a temperature-sensitive element (101, 201, 301); at least one light conducting optical fiber (102, 103, 202, 205, 206, 208, 302, 305, 306, 308, 310); a light source (104, 203, 303); and at least one optical detector (105, 207, 209, 309), the temperature-sensitive element comprising the described polymer mixture.