制备了贮存稳定、高无机硅含量（≥21.0%）的聚（苯乙烯-丙烯酸酯）/SiO2杂化乳液（PSE/Si）,考察了甲基丙烯酸羟乙酯（HEMA）含量对杂化乳液微观形态的影响,探讨了成膜过程中Si-O-Si键的形成机理。结果发现,PSE/Si杂化乳液的粒径及其分布系数随着HEMA含量的增加而减小;透射电镜分析显示,m（HEMA）/m（单体）=3/100时,杂合乳液的分散稳定性良好;傅里叶红外光谱证实杂化乳液两相之间形成了分子间氢键,成膜过程中形成Si-O-Si交联网络;涂膜的综合性能在m（HEMA）/m（单体）=3/100时为最佳;原子力显微镜分析发现,HEMA促进了无机组分在涂膜表面的均匀分布;热失重结果显示,m（HEMA）/m（单体）=3/100时,PSE/Si杂化涂膜的热稳定性优于m（HEMA）/m（单体）=0/100和纯苯丙涂膜。
The poly（styrene-co-acrylate）/silica（PSE/Si） hybrid emulsions with high silicon contents（up to 21%） and good stability were prepared.The effect of 2-hydroxyethyl methacrylate HEMA contents on morphological structure was investigated. The mechanism of Si-O-Si formation was discussed.The results indicate that the particle sizes and distributions decrease with increase of HEMA contents.Transmission electron microscopy（TEM） photos show that the hybrid emulsion shows good dispersive with 3% HEMA contents.Fourier transform infrared（FTIR） confirmed that hydrogen bonds are formed in PSE/Si hybrid emulsions and Si-O-Si crosslinking bonds are formed during film formation.PSE/Si hybrid films with m（HEMA）/m（monomer）=3/100 display better properties.Atomic force microscope（AFM） photos disclose that HEMA promotes the dispersion of inorganic particle on hybrid film surface.Thermogravimetric analysis（TGA） curves demonstrate that PSE/Si hybrid film with m（HEMA）/m（monomer）=3/100 displays much better thermal stability than those with m（HEMA）/m（monomer）=0/100 and pure poly（styrene-co-acrylate）.
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