Current research projects

Image Low temperature – test facilities
Image Measurement of insulated packaging
Image Multifunctional electronic modules for cryogenic applications
Image Software for technical building equipment
Image Swirl-free on the move...
Image Verification of storage suitability of cryo tubes
Image Measurements on ceiling mounted cooling systems
Image Influenced melting point of water by magnetic field
Image Refrigerants, lubricants and mixtures
Image Filter Tests
Image Performance tests of condensing units
Image High Capacity Pulse Tube Cooler
Image Cryostats, Non-Metallic and Metallic
Image Hybrid- Fluid for CO2-Sublimation Cycle
Image Range of services laboratory analyses
Image Testing of mobile leak detectors according to DIN EN 14624

You are here:  Home /  Research and Development


In-situ investigation concerning the swelling behaviour of polymer materials under elevated pressures and temperatures

04/2021 - 09/2023

Dr.-Ing. Margrit Junk

+49-351-4081-5419

Material Science

Polymerwerkstoffe sind heute nicht nur im Alltag, sondern auch im technischen Einsatz nicht mehr wegzudenken. Neben den klassischen Konstruktionskunststoffen spielen im Bereich der Kältetechnik vor allem Elastomere in Form von Dichtungen eine Rolle. Die grundlegenden Werkstoffeigenschaften sowie eine gleichbleibende Qualität des Materials sind hier entscheidend für den störungsfreien Langzeitbetrieb der Anlagen und für die Vermeidung von Kältemittelverlusten.

Ein Indikator für ihre Medienbeständigkeit und somit ein wichtiger Parameter für den Einsatz der Werkstoffe ist das Quellverhalten der Polymere im Kontakt mit flüssigem bzw. gasförmigem Kältemittel (und mit Kältemaschinenöl). Bisher war eine Prüfung bzgl. der Veränderung der Polymere durch die Lagerung unter erhöhten Gasdrücken erst nach deren Entnahme aus dem Medium, also erst NACH der Dekompressionsphase, möglich. Für das in der Praxis relevante Verhalten der Materialien WÄHREND der Medienbelastung und Dekompression waren die Daten bisher nur bedingt aussagekräftig. Genau hier setzt das neue In-Situ-Messverfahren an.

The objective of the research project is to develop and set up a suitable test method for measuring the swelling or shrinkage process of polymer materials in situ under process conditions, i.e. during chemical and mechanical stress (p-T). Utilizing a see-through autoclave, a measurement system is to be configured that can be used for investigations in a temperature range up to 80 °C and for pressures up to 90 bar. Two alternative optical measurement methods will be used and compared. The first is a camera system for recording and measuring the time-dependent swelling behaviour of the samples. The second system is a high-speed 2D optical micrometer.

The measurement method should allow a time- and cost-saving evaluation of materials and provide a basis for the development of improved sealing materials. Thus, this research project contributes significantly to improving product sustainability and the safety of refrigeration systems.

The ILK is the leading institute for method development and investigations on material behaviour in the field of refrigeration technology. With the in-situ method, the existing test methods in the field of material aging and evaluation are supplemented by an innovative measurement procedure.


Your Request

Further Projects - Research and Development

Image

Innovative Parahydrogen Generator Based on Magnets

Magnetic Gas Separation of the Hydrogen Isomers

Image

Innovative cryogenic cooling system for the recondensation / liquefaction of technical gases up to 77 K

high performance efficiency, environmental friendliness, compactness, cost-effectiveness

Image

Intelligent innovative power supply for superconducting coils

Compact, powerful power supply with 4-quadrant converter

Image

Laseroptical measurement

PIV and LDA / PDA

Image

Multifunctional electronic modules for cryogenic applications

Electronic with less wiring effort - more than 100 sensors via one feedthrough