Fig. 8: Temperature distribution of the NR20-sample during biaxial harmonic loading  with a strain amplitude of 60 % at 1 Hz at minimal and maximal strain of the 250th  loading cycle (left and middle) and curves of dissipative heating over time at different strains (right). Source: Leibniz-Institut Polymerforschung, Dresden

A new Biaxial Tester

Biaxial testing System for high static and dynamic Loading of Elastomers and its Applications

For the investigation of elastomers under near-realistic loading, a new Biaxial Tester was designed and tested. more...

June 21. 2018 - Research news


Elastomers in Oil- and Gas-Applications

Oilfield Requirements and Drilling Fluid Influence on Elastomers

Operating environments during oil and gas applications compromise elastomer exposure to hydrocarbons and aqueous solutions at temperatures exceeding 150 °C at high pressure. Besides static seals like O-rings oilfield applications of elastomers contain dynamically strained bellows and Moineau motors. Elastomers show physical as well as chemical interaction with drilling liquids, which result in positive or in negative volume swelling caused by elution processes. Furthermore the elastomer network may be attacked chemically. Contact to acids results in embrittlement of hydrated nitrile rubber (HNBR) whereas alkaline solutions cause degradation of fluoro rubbers. This article describes the main functions of additives and reveals some information on the composition of drilling liquids and the effects on elastomer stability. more...

February 24. 2016 - Research news


Aging and Resistance Studies of Elastomeric Materials

During their application, elastomeric materials are exposed to different environmental influences, which can be the reason for material changes known as „ageing“. Therefore, beside the general facts of ageing, this publication gives a short overview of a literature study regarding artificial ageing investigations. more...

October 7. 2014 - Research news