| A styrene(St)/butyl acrylate(BA) latex was successfully synthesized by using an organic-inorganic hybrid compound (OIHC), an aliphatic carboxylate sodium/nano-silica composite, as the emulsifier, and investigated by Malvern Autosizer 4700, transmission electron microscope (TEM), optical contact angle measurement (OCA) and dynamic mechanical analyzer (DMA). It was found that the protective agent, sodium polyacrylate (PA) could obviously improve the polymerization stability and the functional monomer, glycidyl methacrylate (GMA), could enhance the store stability. The particle size of St-BA latex decreased and then level off with the content of the organic-inorganic hybrid emulsifier increasing. TEM observed that the prepared polymers by the latex were actually an organic-inorganic nanocomposite, and these films had better waterproof property than those prepared by traditional St-BA latex or organic silicone modified St-BA latex. The nanocomposite polymers had much higher glass transition temperature than those containing the same organic silicone content. |
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