Summary
The technique developed for precipitating reinforcing silica into an elastomer is extended to titania fillers by hydrolyzing a titanate instead of a silicate. Of the three catalysts studied, namely HCl, NH4OH, and (C2H5)2NH, the NH4OH was the most efficient, introducing as much as 65 wt % titania into a poly(dimethylsiloxane) network in twelve hours. Stress-strain measurements in elongation showed the nature and extent of the reinforcement to be very similar to that obtained from insitu precipitated silica.
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Wang, S.B., Mark, J.E. In-situ precipitation of reinforcing titania fillers. Polymer Bulletin 17, 271–277 (1987). https://doi.org/10.1007/BF00285360
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DOI: https://doi.org/10.1007/BF00285360