Polymer-grafted silica dispersions

Preparation and Stability of Polymer-Grafted Silica Dispersions... 

Ex situ techniques can also be used. The effects of particle dispersion on the melt state have been documented using nanocomposites containing PS homopolymers or PS-grafted silica. PS has also been grafted onto the cross links in a siloxane polymer and onto filler particles used to reinforce an elastomer. ... 

Finally, in order to make a comparison of the amount of polymer that could be physisorbed, as distinct from terminally-grafted, one sample (S12/PS19, Table III) was prepared in which "dead" PS19 was added to a dispersion of silica S12 in DMF, using essentially similar conditions and quantities as in the preparation of sample S12/PS13a by the grafting route. 

Among the two ionic polymerization techniques mentioned above, a living anionic polymerization should show the best possible control of polymer architecture and composition. Mono dispersed homopolymers, complex-block, graft, star, and miktoarm architectures have been accessible primarily by anionic polymerization methods [22]. They have been used to grow polymer brushes from various small particles such as silica gels graphite,carbon black, and flat surfaces [23-26]. Recent results have been reported on living anionic polymerizations on clay [27] and silica nanoparticles [28,29]. 

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