Evaluation of heterogeneity of elastomers by the dielectric spectroscopy method
˜ theoretical principles and experimental results
The heterogeneity of two elastomers differing in polarity, namely an EPDM terpolymerofethylene-propylene-ethylidenenorbornene and chlorosulphonated polyethylene, both unplasticized and plasticized with varibus amount of a polar crosslinking plasticizer, their unplasticized and plastcized rubber mixtures and vulcanizates has been investigated. In the studies, the methods of di electric spectroscopy in the low frequency range (10-5 to 10-1 Hz, „time response” method) and in the high frequency range (103 to 105 Hz, Schering bridge method) have been used. The results have been discussed from the point of view of the presence of one or two phases in the systems under study.
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