核-壳结构含氟丙烯酸酯乳液的全盛与表征

摘要

A fluorine-containing polyacrylate copolymer emulsion was synthesized by a seed emulsion polymerization method.in which methyl methacrylate(MMA)and butyl acrylate(BA)were USed as main monomers and hexafluorobutyl methacrylate(HFMA)as fluorine-containing monomer.The structure and properties were characterized by Fourier transform infrared spectrum(FT-IR),transmission electron microscopy(TEM),particle size analysis,X-ray photoelectron spectroscopy(XPS),contact angle(CA),differential scanning calorimetry(DSC)and thermogravimetry (TG) analysis.The FTIR and TEM results showed that HFMA Was effectively involved in the emulsion copolvmerization.and the formed emulsion particles had a core-shell structure and a narrow particle size distribution.XPS and CA analysis revealed that a gradient concentration of fluofine existed in the depth profile of fluorine-containing emulsion film which was richer in fluorine and more hydrophobic in one side.DSC and TG analysis also showed that a clear core-shell structure existed in the fluorine-containing emulsion particles,and their film showed higherthermal stability than that of fluorine-ree emulsion.