Influence of filler mixing technique on the properties of silica-filled natural rubber vulcanizates
DOI:
https://doi.org/10.34117/bjdv11n2-072Keywords:
natural rubber, rubber compounding, silica filler, latex-stage filler incorporation, quick coagulationAbstract
A simple process for the preparation of 40 parts silica incorporated dry natural rubber by latex stage master batching followed by quick coagulation and drying was developed. This environment friendly process avoids the loss of silica during mixing associated with the conventional dry rubber – filler mixing on an open two roll mill. The processing and the evaluation of the properties of the vulcanizates based on the dry rubber prepared by the latex stage filler incorporation technique shows improved scorch safety, mechanical properties, abrasion resistance and DeMattia flex resistance compared to a control formulation processed by conventional dry rubber -filler mixing process. The novel latex stage silica incorporation in natural rubber latex followed by quick coagulation and drying is effective at combining significant quantities of silica with natural rubber without the need of additional chemicals such as coupling agents for compatibility.
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