Image Combined building and system simulation
Image Brine (water)-water heat pump
Image State of system and failure analyses
Image Measurements on ceiling mounted cooling systems
Image Intelligent innovative power supply for superconducting coils
Image Behavior of multiphase cryogenic fluids
Image Low noise and non metallic liquid-helium cryostat
Image Laseroptical measurement
Image Multifunctional electronic modules for cryogenic applications
Image Reduction of primary noise sources of fans
Image Micro fluidic expansion valve
Image Innovative small helium liquefier
Image Verification of storage suitability of cryo tubes
Image Humidifier System for High-Purity Gases
Image Thermal engines
Image Refrigerants, lubricants and mixtures

You are here:   /  Home

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

Dr. Margrit Junk


Material Science

Nowadays, polymer materials are not only part of everyday life but are also essential in technical applications. In addition to the classic structural plastics, elastomeric materials are used, mainly as seals, in refrigeration technology. The basic properties of the materials as well as their consistent quality are essential for the long-term and failure-free operation of the systems and for the prevention of refrigerant losses.

The swelling behaviour of the polymers in contact with liquid or gaseous refrigerant (and with refrigeration oil) is an indicator of their resistance to the medium and thus an important parameter for the applicability of the materials. Until now, it was only possible to evaluate changes of the polymers, which were aged under increased gas pressure after their removal from the medium, i.e. AFTER the decompression phase. For the relevant behaviour of the materials DURING the media exposure and decompression, the data were previously only of limited significance. Here, the new in-situ measurement method will show its advantage.

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


Investigation of materials

Investigations regarding the compatibility of materials with refrigerants, oils and heat transfer fluids


Non- invasive flow measurements

PDPA - flow fields and particle sizes


High temperature heat pump

Using waste heat from industrial processes


Computational fluid dynamics CFD

Scientific analysis of flows


Institut für Luft- und Kältetechnik - Gemeinnützige Gesellschaft mbH
Bertolt-Brecht-Allee 20, 01309 Dresden

Secretary to the Management



Image ISO 9001
Bild Zuse Mitglied Bild SIG