Encapsulation and dispersion of carbon black by an in situ controlling radical polymerization of AA/BA/St with DPE as a control agent

In this paper, a new strategy to encapsulate and disperse carbon black by an in situ controlling free radical polymerization of 1,1-Diphenylenthyene (DPE) method was developed. Firstly, a living amphipathic precursor polymer of P (AA-BA) containing DPE unit was synthesized. This precursor could be grafted or absorbed on the surface of small carbon black particles to prevent further aggregation of carbon black. And the DPE unit in the living amphipathic precursor could initiate following monomer to form polymer shell via in situ polymerization. Carbon black/polymer core-shell composite particles with 69.6 wt.% polymer shell were prepared. The encapsulated carbon black had a small particle size and high performance on dispersibility and stability. Encapsulation mechanism of this method was confirmed by analyses of TEM, UV-vis, ¹H NMR, ¹³C NMR, TGA, and other instruments.