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Determination of crosslink density of TPVs and conventional elastomers by means of rapid TSSR-Meter tests

von Dipl.-Phys. Kay Fremuth, Prof. Dr. Norbert Vennemann

TPEs and TPVs combine the properties of conventional elastomers (rubber) and the processibility of thermoplastics. Compared with conventional rubber elastomers, these materials can be more easily processed and more easily recycled. But because of the complex phase morphology and molecular structure, traditional test methods normally used for characterization of elastomers only give limited information about the unique properties of TPE. For this reason a temperature scanning stress relaxation (TSSR) test method has recently been developed [2, 3]. In this work, the basic principle of the TSSR-Meter test method and the latest development for rapid determination of crosslink density of TPV will be described. The new method of rapid determination of crosslink density should also be suitable for conventional elastomers. This will be subject of further investigations.