This analysis reveals how nucleating agents affect foam morphology in extruded high consistency silicone rubber, suggesting significant variations in mechanical properties.
Silicone rubbers are high-performance polymers which, in the case of high consistency silicone rubber (HCR), are processed in the extrusion process, for example. Due to the relatively high material price, the material can be foamed to reduce costs and to adjust certain properties. This study therefore investigated the influence of nucleating agents on extruded high consistency silicone foams where water was used as blowing agent. The types of crosslinker investigated showed clear differences in their resulting foam structure and mechanical properties with the talcum and calcium carbonate agents used.
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Hofmann et al. (2025) studied this question.
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