采用分步乳液聚合法合成了一种具有核-壳结构的环氧-丙烯酸酯复合乳液，通过核层和壳层之间的化学交联使涂膜具有较高的阻尼性能。通过透射电镜观察到乳胶粒子呈均匀的核-壳球形结构，红外光谱（FTIR）结果表明复合乳液涂膜实现了环氧与丙烯酸树脂的交联反应。动态热机械分析（DMA）显示该乳液涂膜具有较高的损耗因子和较宽的阻尼温域，加热成膜的最大损耗因子（tan δ）达到2.12，明显高于传统阻尼涂料，在tan δ＞0.3的阻尼温域为40℃，在金属阻尼涂层材料领域具有良好的应用潜能。%An epoxy/polyacrylate (EP/PA) composite particles with core-shell structure was synthesized by two-stage emulsion polymerization. The high damping property was obtained by cross-linking reaction between core layer and shell layer. TEM showed that the composite particles had a spherical morphology with a core-shell structure 120nm size. Fourier transform infrared spectra (FTIR) indicated the cross-linking between EP groups in core and carboxyl groups in shell during film formation of composite particles. The cross-linking reaction improved the dynamic mechanical property by combining the core and shell polymers. DMA (dynamic mechanical analysis) results revealed that the coatings of composite latex presented a markedly loss factor (tanδ) and widen damping temperature range. The highest peak values of tanδ of the composite materials by heating formation film could reach 2.12, which exceeded the value of the traditional damping coatings. The damping temperature range (tanδ≥0.3) could reach to 40℃. It indicated that the composite material presented an obvious application potentials in the field of metal damping coatings.
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