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Abstract of Lezingenmiddag Elastomer Technology and Engineering Twente University      2008

The effect of DPG on silane chemistry of silica in rubber processing

From the environmental point of view, silica is one of the most important fillers in tire rubber compounding. In silica-filled rubber compounds, large polarity differences between the filler and the polymers are present. Therefore, the silica-silica interaction which has a negative effect on the physical properties of silica-filled rubber, takes place. A silane coupling agent is generally used in silica-filled rubber in order to reduce the polarity difference between filler and polymer. However, the chemistry of silane coupling during rubber processing is complicated. 1,3-diphenylguanidine (DPG), used as a secondary accelerator, has an important function in silica-filled tire rubber. In the present study, the focus is on the effect of DPG on the silane chemistry during processing.